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Sulfolobus solfataricus; Western blotting; antigens; enzyme-linked immunosorbent assay; nucleotide sequences; phylogeny; polyclonal antibodies; protein synthesis; ribosomal RNA
Abstract:
... Polyclonal antibodies were raised against the EFâTu of the archaebacterium Sulfolobus solfataricus and crossâreactivities of EFâTus of other, phylogenetically disparate archaebacteria were determined using Western blotting and ELISA. The results demonstrate a high degree of heterogeneity of archaebacterial Tu factors with recognition by S. solfataricus EFâTu antibodies ranging from 48% to ...
... POLONELLI, L. & MORACE, G., 1989. Serological potential for fungal identification. Specific antigens are valuable for the identification of fungal cultures. Early attempts to immunoidentify fungi were hampered by heterogeneity of antigens, antibody preparations and use of improper serological procedures. In recent years, the double diffusion exoantigcn technique has proved to be the most effective ...
DNA libraries; Pseudomonas thermocarboxydovorans; Western blotting; blood serum; carbon monoxide; clones; genes; plasmids
Abstract:
... Carbon monoxide dehydrogenase (CODH) from Pseudomonas thermocarboxydovorans strain C2 is composed of three nonâidentical subunits. A gene library of C2 DNA in lambda vector L47.1 was generated and screened using antiâCODH serum. Western blotting experiments revealed a protein which coâmigrated with and had the same immunological reaction as the large subunit of CODH in some of the clones iso ...
... Infectious pancreatic necrosis virus serotype Sp was identified by immunohistochemistry in formaldehyde-fixed and paraffin-embedded tissue of Atlantic salmon (Salmo salar). The immunoreaction was present in degenerating and necrotic cells in exocrine pancreatic cells. Cross reactions were observed with rabbit antisera against serotypes Sp, Ab, and VR-299 in neutralization tests and western blottin ...
... Whereas previously there has been no convincing evidence for ribulose bisphosphate carboxylase in dinoflagellates, a strong and highly specific reaction was observed when antibodies to the denatured large subunit of the (silver beet) protein were used to probe Western blots of whole soluble fractions of various Symbiodinium isolates. No reaction was observed using extracts from Symbiodinium isolat ...
Trichodesmium thiebautii; Western blotting; antiserum; cytoplasm; molecular weight; nitrogen-fixing cyanobacteria; nitrogenase; transmission electron microscopy; trichomes
Abstract:
... Nitrogenase reductase (Feâprotein) was detected in the marine planktonic cyanobacterium Trichodesmium. The molecular weight was about 38 kD, as shown by western blotting using anti âRhodospirillum rubrum nitrogenase reductase antiserum. The enzyme was confined to a limited number (ca. 10â40%) of randomly distributed trichomes in the Trichodesmium colonies, as shown by immunogold localization ...
... We have established seven murine hybridoma cell lines which produce monoclonal antibodies (mAbs) against Pseudomonas aeruginosa elastase. The seven mAbs recognized at least six different epitopes on the elastase molecule. All mAbs inhibited both enzymatic activities of elastase and protease, in which elastin fluorescein and hide powder azure were used as substrates, respectively. One of them, mAb ...
... Prostaglandin 9âketoreductase (PGâ9âKR) was purified from pig kidney to homogeneity, as judged by SDS/PAGE using an improved procedure. The enzyme is proâS stereoselective with regard to hydrogen transfer from NADPH with prostaglandin E2 as substrate and reduces its 9âketo group with approximately 90% stereoselectivity to form prostaglandin F2α. Approximately 8% of the prostaglandin F f ...
Western blotting; antibodies; beans; complementary DNA; electrophoresis; heat-shock protein 70; mitochondria; open reading frames; polypeptides; protein aggregates; sequence analysis; threonine; transcription (genetics); translation (genetics)
Abstract:
... A bean cDNA clone that specifies a 70 kDa heat‐shock protein (hsp70) has been isolated and sequenced. The nucleotide sequence analysis shows that the cDNA could encode a 72 kDa protein that is highly related to prokaryotic and mitochondrial members of the hsp70 family. The predicted protein was found to contain an amino‐terminal extension typical of transit sequences. The in vitro transcription/tr ...
Picea abies; Western blotting; antibodies; biomarkers; corn; ozone; pathogenesis; pathogenesis-related proteins; pathogens; tobacco; trees
Abstract:
... In a search for biochemical markers indicating the impact of ozone on plants. Pathogenesis related (PR) proteins were studied. The following observations were made: (1) PR‐proteins are present in gymnosperms, exemplified by Norway spruce (Picea abies) and (2) ozone induces PR‐proteins in Norway spruce. Studies were made by Western blot analysis using antibodies raised against seven PR‐proteins; fi ...
... The cross‐reactivity of two polyclonal antisera with various members of the Potyviridae was determined using four different serological methods. An antiserum (no. 314) prepared against apparently intact turnip mosaic potyvirus (TuMV) particles showed a high cross‐reactivity with all of 20 aphid‐borne potyviruses tested as well as the mite‐borne ryegrass mosaic rymovirus (RGMV) and the fungus‐borne ...
... Rabbit polyclonal antibodies prepared against faba bean phyllody MLO from the Sudan reacted with its homologous antigen and with extracts of Catharanthus roseus experimentally infected with the same or a related MLO from Crotalaria saltiana showing symptoms of phyllody disease, as well as with extracts of naturally MLO‐infected C. saltiana growing in the field in the Sudan. The antibodies also rea ...
Western blotting; animal pathology; antibodies; antiserum; bone marrow; dogs; granulocyte colony-stimulating factor; hyperplasia; necropsy; neutropenia; neutrophils; rabbits
Abstract:
... A severe persistent neutropenia developed in a rabbit that was injected intradermally with 120, 60, 60, and 120 μg of recombinant canine granulocyte colony-stimulating factor (cG-CSF) on days 1, 22, 31, and 44, respectively. The neutropenia was present from day 44 to day 205. The nadir of the neutropenia (60 cells/μl) occurred in conjunction with peak antibody titer (640,000) to cG-CSF on day 58. ...
D1 protein; Western blotting; aerobic conditions; antibodies; crosslinking; gels; hydroxylamine; molecular weight; pH; photoinhibition; photosystem II; polyacrylamide gel electrophoresis; proteins; sodium dodecyl sulfate; spinach; urea; white light
Abstract:
... When photosystem II (PS II) membranes from spinach were treated with Tris (0.8 M, pH 9.0) and illuminated with white light (5000 microeinsteins m(-2) s(-1) under aerobic conditions at 25 degrees C, not only were the reaction center-forming D1 and D2 proteins degraded but the antenna chlorophyll-binding protein CP43 was also degraded. Three products of the degradation of CP43, with molecular masses ...
... Cytochrome (cyt) c-550 and the 33 kDa protein are two extrinsic components that function in maintaining oxygen evolution in cyanobacterial cells. Deletion of either of the two components has been shown to result in cyanobacterial phenotypes that are still capable of photoautotrophic growth albeit with a reduced rate. In order to study the function of cyt c-550 in cyanobacterial photosystem II (PSI ...
... General muscle proteins and parvalbumins of Tilapia dageti (Thys van den Audenaerde), T. guineensis (Bleeker) and T. zillii (Gervais) (Pisces, Cichlidae) which occur sympatrically in Ghana were subjected to various electrophoretic and immunological assays, and erythrocytes of the species underwent agglutination tests. These investigations aimed to identify species-specific markers, as discriminati ...
... Candida maltosa JCM1504 can grow well on L-alanine as a sole carbon and nitrogen source. We found that the activities of alanine aminotransferase (AlaAT) and NAD-dependent glutamate dehydrogenase were remarkably induced when glucose-grown cells were transferred to medium containing L-alanine. This suggested that C. maltosa has an inducible L-alanine degradation system including the above two enzym ...
DNA; Rhodobacter sphaeroides; Western blotting; bacterial motility; drug resistance; flagellin; genes; mutants; phenotype; restriction mapping; sequence analysis; transposons
Abstract:
... A transposon mutant of Rhodobacter sphaeroides WS8 was isolated that showed reduced swarming on soft agar plates. Liquid cultures of this mutant (M18) showed a low percentage of motile swimming cells in mid‐exponential phase and a low level of extracellular flagellin protein by Western blotting. M18 was complemented by a clone from a library of R. sphaeroides WS8 DNA, and restriction mapping of th ...
... A dot immunobinding assay (DIA) was developed for the detection of antibodies to Salmonella enteritidis. Western blot analysis of outer membrane proteins from SE identified 2 polypeptides of molecular masses 43 and 46 kD that were specific for S. enteritidis. These 2 polypeptides were utilized as antigens in the DIA. The DIA was tested on sera from chickens experimentally infected with S. enteriti ...
... The direct biochemical analysis of protein tyrosine kinases from yeast has been difficult due to their very low activity in crude cell lysates. Here we present a procedure for the enrichment and partial purification of protein tyrosine kinases from Saccharomyces cerevisiae based on single‐step substrate affinity chromatography using a synthetic random co‐polymer of glutamic acid and tyrosine. Frac ...
... The purpose of this study was to evaluate a serodiagnostic test (enzyme‐linked immunosorbent assay; ELISA) for sarcoptic mange in dogs and to characterize the assay antigen, based on the mite Sarcoptes scabiei var. vulpes. The ELISA, applied to sera from 359 dogs suspected of having sarcoptic mange, showed a sensitivity and specificity of 92 and 96%, respectively. Sodium dodecyl sulphate polyacryl ...
... Previously, we showed that cathepsin L is essential for the differentiation of imaginal discs of the flesh fly [Homma, K. & Natori, S. (1994) J. Biol. Chem. 269, 15258 - 15264]. We have now identified imaginal disc proteins that are susceptible to digestion by cathepsin L and showed that they are selectively hydrolyzed during imaginal disc differentiation. Two of these proteins, with molecular mas ...
Dichelobacter nodosus; Western blotting; antigens; electron microscopy; enzyme-linked immunosorbent assay; false positive results; molecular weight; potassium thiocyanate; sheep
Abstract:
... The antigens extracted from Dichelobacter nodosus with potassium thiocyanate were analyzed by western blotting with sera from footrot-free sheep and from sheep infected with D. nodosus to identify components specific for infection. Several components with molecular mass < 33 kD were associated with infection, particularly bands of 32.5 kD, 30.5 kD, and 28 kD. Components with molecular mass > 56 kD ...
Hyphomicrobium methylovorum; Methylobacterium; Western blotting; antibodies; bacteria; enzymes
Abstract:
... Immunological characterization of serine‐glyoxylate aminotransferase and hydroxypyruvate reductase, key enzymes for the assimilation of one‐carbon compounds in methylotrophs, was performed using antibodies raised against these enzymes purified from Hyphomicrobium methylovorum GM2. Immunodiffusion studies indicated that serine‐glyoxylate aminotransferase and hydroxypyruvate reductase of all seven H ...
Escherichia coli; Hordeum vulgare; Oryza sativa; Pisum sativum; Western blotting; antibodies; barley; chloroplast genome; chloroplasts; etiolation; genes; leaf extracts; leaves; peas; protein degradation; protein synthesis; proteinases; proteins; proteolysis; rice; roots
Abstract:
... Despite numerous demonstrations of protein degradation in chloroplasts of higher plants, little is known about the identity of the proteases involved in these reactions. To identify chloroplast proteases by immunological means, we investigated two proteins: ClpP, a protein similar to the proteolytic subunit of the bacterial ATP-dependent Clp protease, for which a gene is found in the chloroplast g ...
prions; diagnostic techniques; spleen; scrapie; Western blotting
Abstract:
... Scrapie in sheep has recently become again a target of control measures and eradication programs. Crucial for the effectiveness of these measures is the detection of infected sheep during the long and potentially hazardous incubation period. However, routine-diagnosis is mostly limited to clinical examinations when disease becomes apparent, and to postmortem investigations. Through the detection o ...
... A genomic DNA clone encoding carnitine acetyltransferases (EC 2.3.1.7), localized in two subcellular organelles, peroxisomes and mitochondria of an n-alkane-assimilating yeast Candida tropicalis, was isolated from the yeast lambda EMBL library using a carnitine acetyltransferase cDNA probe. Nucleotide sequence analysis disclosed that the open reading frame was 1881 bp, corresponding to 627 amino a ...
Western blotting; acetylation; acetyltransferases; amino acids; antiserum; chromatin; corn; gel chromatography; germination; histone deacetylase; histones; molecular weight; polyacrylamide gel electrophoresis; polyclonal antibodies; polypeptides; rabbits
Abstract:
... The dynamic state of core histone acetylation is maintained by histone acetyltransferases and deacetylases. In germinating maize embryos, four nuclear histone deacetylases can be distinguished. From a chromatin fraction prepared at 72 h after start of embryo germination, we have purified the nuclear histone deacetylase HD2 to homogeneity. Using a sequence of chromatographic steps, we achieved the ...
Clostridium thermocellum; EDTA (chelating agent); Western blotting; aerobic conditions; amino acid sequences; antibodies; asparagine; calcium; cellulosome; epitopes; models; peptides; polyacrylamide gel electrophoresis; protein subunits
Abstract:
... The cellulosome of Clostridium thermocellum is a multipolypeptide complex of structural and catalytic subunits. Several of the catalytic subunits have at the carboxyl end a conserved duplicated region (CDR) which interacts with internally repeated elements (IREs) of scaffolding subunits such as CipA. This interaction requires calcium. The two parts of the CDR region here designated CDR1 and CDR2 ( ...
Baculoviridae; Western blotting; Spodoptera frugiperda; cell lines; Northern blotting
Abstract:
... The assembly of the polyhedron envelope in baculovirus-infected cells has been the subject of several studies, yet it is still poorly understood. We have used immunogold-labelled antibodies to two baculovirus proteins, p10 and calyx (also referred to as polyhedron envelope protein or PEP), to follow envelope assembly in AcMNPV-infected tissues of Spodoptera frugiperda larvae. We show that, in wild ...
... Western blot analysis showed the presence of three forms of starch-branching enzyme (SBE), with apparent molecular masses of 103, 97 and 80 kDa, in extracts of leaves and stored tubers of Solanum tuberosum. The 80-kDa form was absent in extracts of fresh tuber. Active 80-kDa enzyme was partially purified from stored tubers and sequence analysis showed that it, similar to the two larger enzyme form ...
Escherichia coli K12; Western blotting; biotechnology; gamma-glutamyltransferase; genes; temperature
Abstract:
... Escherichia coli K-12 cultured at 20°C has more γ-glutamyltranspeptidase (GGT: EC 2.3.2.2) activity than that cultured at 37 or 42°C. On Western blot analysis, E. coli K-12 cells cultured at 20°C produced more GGT protein than those cultured at 37°C. mRNA of the GGT gene (ggt) in the cells was also measured and it was found that the level of ggt mRNA at 20°C was 10-fold higher than that at 37°C. W ...
... Five overlapping segments of the VP60 capsid protein gene of rabbit haemorrhagic disease virus have been expressed in E. coli under the control of the T7 RNA polymerase. After purification, the antigenicity of these denatured protein segments has been studied by reactivity with sera from both naturally infected and vaccinated animals in Western blot analysis. The amino terminus segments of the pro ...
... Prions are infectious agents involved in neurodegenerative diseases, such as scrapie in sheep and goats, bovine spongiform encephalopathy (BSE) in cows and Creutzfeldt-Jakob disease (CJD) in humans. These pathogens are characterized by unusual properties, and, in particular, by their strong resistance to common procedures of disinfection used against conventional microorganisms. A major component ...
... The precursor proteins of the carotenogenic enzymes geranylgeranyl diphosphate synthase, phytoene synthase, phytoene desaturase and lycopene cyclase were imported into isolated pea chloroplasts. Geranylgeranyl diphosphate synthase remained soluble in the stroma in a free form and phytoene synthase associated to thylakoid membranes upon import, both as expected. Surprisingly, phytoene desaturase an ...
DNA probes; Western blotting; antibodies; cattle; complementary DNA; cyclins; developmental stages; genes; goats; granulosa cells; in situ hybridization; meiosis; messenger RNA; oocytes; polymerase chain reaction; polypeptides; transcription (genetics)
Abstract:
... To start determining the nature of meiotic incompetence in goat oocytes, we have examined the expression of one of the potential pre-MPF subunits: the cyclin B1. We have been isolating a small DNA probe encoding the goat cyclin B1 box to analyze the expression of the cyclin B1 gene in competent and incompetent goat oocytes. This probe was easily obtained by polymerase chain-reaction (PCR) on rever ...
... A western blot assay using purified recombinant bovine immunodeficiency virus gag protein has been developed for detection of bovine immunodeficiency virus antibodies in bovine serum samples. The test was standardized with known bovine immunodeficiency virus positive and negative bovine serum samples and the monoclonal antibody to gag protein. Both naturally and experimentally infected cattle sera ...
... Polymorphonuclear (PMN) cells of more than 90% viability and 92% purity were isolated from the peripheral blood of buffaloes. The cationic proteins were extracted with 0.2 mol/L sodium acetate, pH 4.0 from the granules in the PMN and subjected to both non-denaturing and denaturing acid urea polyacrylamide gel electrophoresis (AUPAGE) for identification of myeloperoxidase (MPO), lysozyme, protease ...
Western blotting; antibodies; epithelium; gel electrophoresis; immunohistochemistry; messenger RNA; nuclear proteins; oligonucleotides; pregnancy; proto-oncogenes; sheep; trophoblast
Abstract:
... Expression of c-fos and jun protoon-cogenes was analyzed in the ovine extraembryonic trophoblast from days 14-18 of gestation, using Northern and Western blotting and immunohistochemistry. This study was carried out in relation to the early implantation process and the expression of interferon-tau, which is secreted in large amounts for a few days before implantation. Our results demonstrated that ...
... Full-length cDNA clones coding for the matrix (M) and fusion (F) proteins of equine morbillivirus (EMV) were isolated by RT-PCR, and expressed in Escherichia coli using two different expression systems. Western blot analysis indicated that the M and F proteins, expressed either by itself or as fusion proteins with glutathione S-transferase (GST), were insoluble and degraded after expression. Analy ...
... Foot-and-mouth disease (FMD) vaccines induce antibodies against structural and some nonstructural proteins present in vaccine preparations. To differentiate between FMDV-infected and vaccinated animals, we developed immunochemical assays capable of detecting antibodies against a FMDV nonstructural protein. Recombinant nonstructural 3AB1 protein was expressed in E. coli and in insect cells and used ...
NAD (coenzyme); Neurospora crassa; Western blotting; adenosine triphosphate; crosslinking; fluorescence; heat-shock protein 70; polyacrylamide gel electrophoresis; polyclonal antibodies; precipitin tests; tryptophan; uridine triphosphate
Abstract:
... The subunit structure of Hsp80, the most abundant heat-shock protein of Neurospora crassa, was examined by chemical cross-linking of the purified protein in vitro. Resolution of glutaraldehyde-treated Hsp80 by sodium dodecyl sulfate-polyacrylamide gel electrophoresis SDS-PAGE suggests that the native state of this protein is a tetramer; the relative proportion of cross-linked species, estimated by ...
Northern blotting; Western blotting; blood sampling; drugs; enzyme activity; hematocrit; hemoglobin; hemolytic anemia; monoclonal antibodies; patients; protein kinases; protein synthesis; rabbits; reticulocyte count; reticulocytes
Abstract:
... The heme-regulated enkaryotic initiation factor-2α (eIF-2α) kinase, also called the heme-regulated inhibitor (HRI), is a key regulator of protein synthesis in mammalian reticulocyte. HRI is almost undetectable in blood samples of normal rabbits and it increases by 12–15-fold in the reticulocytes of anemic rabbits. In order to determine if such an increase in the quantity of HRI is gradual during a ...
Lactococcus lactis; Western blotting; active sites; bacteria; cattle; gene expression; genes; heterologous gene expression; hybridization; plasmin; promoter regions; secretion; signal peptide
Abstract:
... Heterologous production of bovine plasmin was studied in the industrially relevant bacterium Lactococcus lactis. Two sets of lactococcal gene expression signals were coupled to the region of the plasmin gene coding for the serine protease domain. When the promoter region of the prtP gene was used, plasmin was detected mainly intracellularly in strain BPL25 by Western blot hybridization. The intrac ...
... Anti-human T-lymphotropic virus type I/II (HTLV-I/II) antibodies were screened by particle agglutination test in a total of 66 patients with thalassemia major who received multiple transfusion from paid donors at the Blood Transfusion Hematology Center of Ho Chi Minh City in South Vietnam. HTLV-II infection was confirmed in 6 patients (9.1%) by Western blot analysis and/or polymerase chain reactio ...
Orf virus; Western blotting; cross reaction; electron microscopy; enzyme-linked immunosorbent assay; epitopes; immunoglobulin M; mice; monoclonal antibodies; pathogenicity; viruses
Abstract:
... Monoclonal antibodies (Mabs) were generated in BALB/c mice immunized with gradient-purified particles, envelopes and cores of intracellular mature orf virus D-1701. Three distinct antigenic sites were identified in this virus strain. Their topographical relationships was determined by pairwise epitope specificity studies in competition ELISAs. One MAb (class IgM) neutralized virus infectivity. Fou ...
... Bovine herpesvirus 1 (BHV-1) encodes four immediate-early (IE) proteins. The transactivators BICP0 and BICP4 are key regulatory elements in viral replication, and circ is a myristylated virion component, whereas BICP22 – originating from a spliced 1.7-kb transcript synthesized with dual IE and late kinetics – has not yet been characterized as a protein. In this study, Western blot and immunofluore ...
... Although peroxisomal localization of NADP-linked isocitrate dehydrogenase (Idp) was first demonstrated in Candida tropicalis, the mitochondrial isozyme has not been found in this yeast. Here we report that the presence of mitochondrial Idp in the yeast was demonstrated by screening for its gene with a DNA probe containing conserved sequences of Idps from various organisms. The nucleotide sequence ...
... An aspartic proteinase in rice seeds (oryzasin) was purified by (NH4)2SO4 fractionation, DEAE-celluose anion exchange chromatography, Sephadex G-100 gel filtration, Mono Q anion exchange chromatography, and pepstatin-affinity chromatography. SDS-PAGE showed the affinity-purified enzyme to have two molecular forms, 57 and 53 kDa, together with their probable autolysates appearing as two small bands ...
... The larva of Scrobipalpuloides absoluta, a South American moth, is the most devastating insect pest of tomato production in Chile. The potential for using bacterial insecticides was studied analysing the relative toxicity of native Bacillus thuringiensis (BT) isolates belonging to the Chilean collection. The polymerase chain reaction (PCR) technique was used in order to facilitate the prescreening ...
Suid alphaherpesvirus 1; regulatory proteins; Western blotting; gene expression; transcription (genetics); cytopathogenicity; genes; viruses; DNA topoisomerase
Abstract:
... Previous results from our laboratory have demonstrated that type I DNA topoisomerase activity is required for the replication and gene expression of pseudorabies virus (PRV). In the present report, we further analyzed the expression of topoisomerase I in PRV-infected cells, and the western blot result showed that the expression of topoisomerase I was increased after virus infection. The increase s ...
Hyalella azteca; Western blotting; biomarkers; cadmium; densitometry; diazinon; dieldrin; freshwater; heavy metals; lethal concentration 50; polycyclic aromatic hydrocarbons; protein synthesis; proteins; sediments
Abstract:
... To investigate the use of stress proteins hsp60 and hsp70 as sublethal biomarkers for contaminant exposure in sediments, two infaunal (Ampelisca abdita, estuarine; Rhepoxynius abronius, marine) and one epifaunal (Hyalella azteca, freshwater) amphipod species were exposed for 24 h to solutions of the heavy metal cadmium, the pesticides diazinon and dieldrin, and the polycyclic aromatic hydrocarbon ...
... Ferredoxin (Fd)-dependent glutamate synthase is present in green leaves, etiolated leaves, shoots and roots of Arabidopsis thaliana (ecotype Columbia). In photosynthetic green leaves and shoots, Fd-dependent glutamate synthase accounts for more than 96% Of the total glutamate synthase activity in vitro with the remaining activity derived from an enzyme that uses NADH as the electron donor. In etio ...
... A lambda ZAP II cDNA library was constructed by cloning cDNA prepared from a high molecular weight double-stranded RNA (dsRNA, ca. 18 kb) isolated from grapevine leafroll associated closterovirus-3 (GLRaV-3) infected tissues. This cDNA library was immuno-screened with GLRaV-3 coat protein specific polyclonal and monoclonal antibodies and three immuno-positive clones were identified. Analysis of nu ...
chickens; Mycoplasma gallisepticum; polypeptides; immune response; immunoglobulin A; immunoglobulin M; immunoglobulin G; blood serum; trachea (vertebrates); Western blotting
Abstract:
... Two experiments were conducted to test the sensitivity of Western blotting for detection of M. gallisepticum antibodies in respiratory washings and sera of infected chickens by mouse monoclonal antibodies to chicken IgG, IgM and IgA. In the first experiment, birds infected at 10 days of age were examined 2 weeks later. In the respiratory washings, IgA antibodies reacted with eight polypeptides of ...
... Over the past decade, there have been many reports suggesting the presence of complex carbohydrates on nuclear and cytoplasmic proteins in mammalian cells. Some of the most often cited of these reports deal with the glycosylation of the high mobility group (HMG) proteins. These are relatively abundant chromosomal proteins that are known to be associated with nucleosomes and actively transcribed re ...
Rotavirus; Vibrio cholerae; Western blotting; cattle; humans; mice; neutralization; polysaccharides; proteins; serotypes; sialidase; viruses; United Kingdom
Abstract:
... Serotype specific (non-immunoglobulin) inhibitors of rotavirus have been identified in normal mouse serum obtained from BALB/c, CBA, and BL10 mice. Sialic acid was essential for the neutralising activity as sera treated with the neuraminidase from Vibrio cholerae failed to neutralise rotavirus. G serotypes 4, 5, 7, 8, 9, & 10 were unaffected by the inhibitor(s) while G serotypes 1, 2, 6 and two G3 ...
... A mutant of Lactococcus lactis subsp. lactis C2 with reduced membrane-bound ATPase activity was characterized to clarify its acid sensitivity. The cytoplasmic pH of the mutant was measured in reference to the parental strain under various pH conditions. At low pH, the mutant could not maintain its cytoplasmic pH near neutral, and lost its viability faster than the parental strain. The ATPase activ ...
... A mutant of Saccharomyces cerevisiae deleted for the COQ3 gene was constructed. COQ3 encodes a 3,4‐dihydroxy‐5‐hexaprenylbenzoate (DHHB) methyltransferase that catalyses the fourth step in the biosynthesis of ubiquinone from p‐hydroxybenzoic acid. A full length cDNA encoding a homologue of DHHB‐methyltransferase was cloned from an Arabidopsis thaliana cDNA library by functional complementation of ...
... A full-length DNA clone encoding the genome of odontoglossum ringspot tobamovirus (ORSV) was synthesized and placed adjacent to a bacteriophage T7 RNA polymerase promoter. Capped-RNA transcripts produced in vitro were highly infectious when mechanically inoculated onto seedlings of Nicotiana benthamiana and Oncidium Gower Ramsey. A representative clone, designated pOT2, caused a disease phenotype ...
... Detection of BIV virus infection by serological means, PCR and virus isolation in experimentally infected calves is described. Viral sequences were specifically detected by PCR in peripheral blood mononuclear cells (PBMCs), with primer systems located in the gag, pol and tat regions of the viral genome. An enzyme-linked oligosorbent assay (ELOSA) in microtiter plates is described, for the detectio ...
Escherichia coli; Mycobacterium avium subsp. paratuberculosis; Mycobacterium smegmatis; Western blotting; antibodies; genes; open reading frames; plasmids
Abstract:
... Mycobacterium paratuberculosis is mycobactin dependent and contains multiple copies of the IS900 gene that encodes for p43 (46.5K protein). The correlation between the two characteristics has been investigated. A 3.2-kb BamHI fragment from M. paratuberculosis containing the 1.451 kb IS900 gene was cloned in Escherichia coli and Mycobacterium smegmatis with pcDNA II and pNEZ6.3 plasmids, respective ...
infection; Botrytis cinerea; grape must; plant proteins; detection; polyacrylamide gel electrophoresis; Western blotting
Abstract:
... Qualitative effects of Botrytis cinerea infection on a must protein fraction were studied by comparing the electrophoretic patterns of musts obtained from healthy grapes or from grapes highly infected by B. cinerea. Evidence was obtained that proteins secreted by B. cinerea can degrade grape proteins. Most of the proteins present in the healthy must, between 20 and 30 kDa and a major glycoprotein ...
... Cellulose-producing Acetobacter xylinum has been known to secrete a cellulose-hydrolyzing β-1,4-endoglucanase (CMCax). When antibodies to recombinant CMCax were added to the culture medium, the formation of cellulose fiber was severely inhibited. Western blot analysis using the antibody showed that this enzyme was secreted into the medium even by a cellulose non-producing strain (Cel⁻). These resu ...
... Adults of the human parasitic trematode Schistosoma mansoni, which causes hepatosplenic/intestinal complications in humans, synthesize glycoconjugates containing the Lewis x (Leˣ) Galβ1→4(Fucα1→3)GlcNAcβ1→R, but not sialyl Lewis x (sLeˣ), antigen. We now report on our analyses of Leˣ and sLeˣ expression in S.haematobium and S.japonicum, which are two other major species of human schistosomes that ...
Paul François Gallet; Hélène Vaujour; Jean-Michel Petit; Abderrahman Maftah; Ahmad Oulmouden; Rafael Oriol; Christine Le Narvor; Michel Guilloton; Raymond Julien
... A stable GS115 Pichia pastoris recombinant strain was constructed to secrete a truncated form of the human α(1,3/4) fucosyltransferase (amino acids 45–361). Enzyme production resulted from a secretory pathway based on the pre-pro- α mating factor signal sequence of the yeast Saccharomyces cerevisiae. Following its transit through the Golgi apparatus, the enzyme accumulated in the periplasmic space ...
... Thaumatin‐like proteins (TLPs) were shown to be induced in rice plants (cv. IR58) that were infected with the sheath blight fungus, Rhizoctonia solani. Western blot analysis revealed the presence of two TLPs with sizes of 25 and 24 kDa which are different from a previously reported TLP with a size of 15.6 kDa from rice plants infiltrated with the non‐pathogenic bacterium, Pseudomonas syringae pv. ...
... From a lung of a fetus of a breeding sow showing PRRS-like symptoms a viral agent could be isolated. It was characterized as an enveloped, hemag-glutinating RNA virus. Ultrastructural examination of purified virus revealed paramyxovirus-like pleomorphic virions of approx. 200 nm in diameter. The helical nucleocapsids were about 18 nm in diameter. The virus was found to be antigenically related to ...
... Three endopolygalacturonases (endoPG Ia, Ib, and Ic) were isolated from the culture filtrate of Stereum purpureum, the causative fungus of apple silver-leaf disease. Their properties, including specific activities, optimum pHs, thermal stabilities, and kinetic parameters (K ₘ and V ₘₐₓ) were compared. Their properties were very similar to one another except for the substrate specificity and relati ...
Northern blotting; Western blotting; biotechnology; mice; proteinases; small intestine; sucrose alpha-glucosidase
Abstract:
... The small intestinal sucrase activity in a senescence-accelerated strain of mouse, SAMP1, was significantly lower than that in other strains, including its control strain, SAMR1. In contrast, the activity of isomaltase, which usually associates with sucrase to form a complex enzyme (SI complex), in SAMP1 was comparable to that in other strains. Thus, the ratio of the sucrase to isomaltase activiti ...
... This report presents a case of paraneoplastic pemphigus in a 7‐year‐old female Bouvier. The dog initially showed extensive oral ulcerations that exacerbated upon treatment with trimethoprim‐sulfadiazine. Subsequently, the dog developed vesiculobullous and ulcerative lesions on the ear margins, the nose, periocular, and at the nail beds. Due to complete therapy resistance and a deteriorating genera ...
... Heat shock proteins (Hsps) represent a group of specific proteins which are synthesized primarily in response to heat shock in almost all biological systems. Members of Hsp100 family have been directly implicated in induction of thermotolerance in microbial and animal cells. Yeast cells harbouring defectivehsp104 gene do not show thermotolerance under conditions in which the normal cells do. Sever ...
Western blotting; antiserum; brain; carbohydrates; clones; epitopes; galectins; humans; monoclonal antibodies; two-dimensional gel electrophoresis
Abstract:
... Antisera raised against galectin-1 exhibit crossreactivities with other galectins or related molecules. In order to overcome this problem, a monoclonal antibody to human brain galectin-1 was obtained by selecting clones without reactivity toward galectin-3. This mAb specifically bound galectin-1 of various animal origins but neither galectin-2 nor galectin-3. Western-blotting analysis of soluble h ...
Escherichia coli; Nephila clavipes; Western blotting; amino acid composition; complementary DNA; desorption; genes; mass spectrometry; silk; silk proteins
Abstract:
... A partial cDNA clone, from the 3' end of the dragline silk gene was isolated from Nephila clavipes major ampullate glands. This clone contains a 1.7-kb insert, consisting of a repetitive coding region of 1.4-kb and a 0.3-kb nonrepetitive coding region; 1.5-kb of the 1.7-kb fragment was cloned into Escherichia coli and a 43-kDa recombinant silk protein was expressed. Characterization of the purifie ...
... Galectins, β-galactoside-binding lectins, are extensively distributed in the animal kingdom and share some basic molecular properties. Galectin-3, a member of this family, is generally associated with differentiation, morphogenesis, and metastasis. In this study, galectin-3 was isolated from ovine placental cotyledons round the middle of the gestation period by lactose extraction followed by affin ...
... Passage of ingested cat immunoglobulin G (IgG) into the hemocoel of cat fleas, Ctenocephalides felis (Bouche), was examined using antibody capture enzyme-linked immunosorbent assays (ELISA) and Western blotting. Fleas were fed heparinized cat blood via membrane feeders. Cat IgG was present in the hemolymph of engorged female fleas 1 h after ingestion at an estimated quantity of 35 +/- 14 microgram ...
... In previous work, it was reported that a strain of Aeromonas hydrophila (B32) produces the most potent lethal toxin with neurotoxic activity described so far for fish. In the present study, the presence and distribution of this acetylcholinesterase toxin lethal for fish were determined in extracellular products (ECP) of 42 Vibrionaceae strains using both immunological and colorimetric methods. Thi ...
... Following amino acid or ammonium starvation, ppGpp is accumulated by Rhizobium meliloti strain 1021 but not by R. meliloti strain 41 or Rhizobium tropici. Azorhizobium caulinodans ORS571 produced ppGpp following amino acid deprivation; however, the free-living nitrogen-fixing bacteria Azotobacter vinelandii and Azomonas agilis did not produce ppGpp. Western blot analysis using anti-RelA antibody d ...
metabolism; seeds; aldehyde oxidoreductases; Hordeum vulgare; immunohistochemistry; heat stability; enzyme activity; plant extracts; Western blotting; enzyme inhibitors; molybdenum; chemical constituents of plants; molecular weight; isozymes; roots; aldehydes; leaves
Abstract:
... Aldehyde oxidase (AO, EC 1.2.3.1) proteins in leaves, roots and seeds of barley (Hordeum vulgare L.) plants were studied. Differences in substrate specificity and mobility in native PAGE between AO proteins extracted from roots, leaves and seeds have been observed. Four clear bands of AO reacting proteins were detected in barley plants capable of oxidizing a number of aliphatic and aromatic aldehy ...
... Nitrogen assimilation was studied in the deciduous, perennial climber Clematis vitalba. When solely supplied with NO₃⁻ in a hydroponic system, growth and N-assimilation characteristics were similar to those reported for a range of other species. When solely supplied with NH₄⁺, however, nitrate reductase (NR) activity dramatically increased in shoot tissue, and particularly leaf tissue, to up to th ...
... The occurrence of calreticulin, the main Ca²⁺ binding protein in the endoplasmic reticulum of eukaryotic cells, was investigated in the unicellular green alga Chlamydomonas reinhardtii Dangeard. The biochemical characterization of a diethylaminoethyl purified extract highlighted the presence, on SDS-PAGE, of a 55-kDa protein that stained blue with the Stains All dye, a diagnostic feature of acidic ...
... Cellulose-binding proteins (CBP) isolated from cell envelopes of the cellulolytic bacterium Fibrobacter intestinalis strain DR7 were studied in order to investigate the adhesion mechanism. The proteins were examined for their reaction with antibodies that specifically block bacterial adhesion, response to glycosylation staining and monosaccharide composition. To this end, the effect of some monosa ...
Jimmy Kwang; Simon Yang; Fernando A. Osorio; Steve Christian; J. Galeota Wheeler; Kelly M. Lager; Sharon Low; Leo Chang; Alan R. Doster; Amy White; Ching Ching Wu
swine; porcine reproductive and respiratory syndrome; Arterivirus; antibody formation; open reading frames; antibody detection; enzyme-linked immunosorbent assay; recombinant antigens; Western blotting
Abstract:
... The sensitivity and specificity of recombinant open reading frame 5 products used in the Western blotting assay for confirmation of porcine reproductive and respiratory syndrome virus (PRRSV) serologic status were evaluated. The recombinant antigen-based assays were specifically compared with a commercial enzyme-linked immunosorbent assay (ELISA) for PRRSV antibodies using 1) PRRSV antibody-negati ...
... Fourteen orthopoxvirus strains isolated from humans, cats, a dog, a cow, and an elephant in Germany were characterized. All were classified as cowpox virus based on haemorrhagic lesions induced on the chorioallantoic membrane of chicken eggs and reactivity of a 160 kDa protein with anti-A-type inclusion protein hyperimmun serum in a Western blot. More detailed comparison of the isolates by restric ...
Baculoviridae; Western blotting; amino acid sequences; complementary DNA; fat body; genes; insect larvae; insects; mice; open reading frames; proteins; viruses
Abstract:
... cDNA of yellowtail ascites virus (YAV) segment A encoding a polyprotein of VP2, NS, and VP3 has been cloned. Comparison of the nucleotide and the deduced amino acid sequences showed very high homology between YAV and other aquatic birnaviruses. The two small open reading frames (VP5) besides the 5′ terminus of the VP2 gene were found on segment A of YAV. Proteins encoded by cDNAs from segment A an ...
... Studies in cell lines and malignant human tissues have shown that increased cell-surface Asn-linked β1–6(GlcNAcβ1–6Man) branching is associated with increased tumorigenic and metastatic properties. In this study, three mouse mammary cancer cell lines were transfected with an expression vector containing the mouse cDNA for N-acetylglucosaminyltransferase V (GlcNAcT-V EC 2.4.1.155), the glycosyltran ...
... We describe methods for the preparation of collagen and gelatin samples to detect possible prion contaminants using Western blotting of a major component of prions, PrPSᶜ. A commercially available collagen solution containing 2% athero-collagen was spiked with rodent adapted scrapie prion and used as the prion-contaminating collagen. The methods developed center on the enzymatic reduction of the c ...
Western blotting; affinity chromatography; agarose; antiserum; autoradiography; blood serum; cellophane; cellulose acetate; denaturation; desorption; dialysis; gel electrophoresis; human serum albumin; humans; molecular weight; porosity; radiolabeling; sodium dodecyl sulfate
Abstract:
... A simple method is described for electrophoretic desorption of proteins from antigen-antibody complexes, with more than 90% recovery and without denaturation, after immunosorbent affinity chromatography. Radiolabeled or unlabeled human serum albumin (HSA) and α-1-antitrypsin (AAT), conjugated to rabbit anti-HSA or anti-AAT polyclonal antisera, respectively, were electrophoretically desorbed from S ...
... Sialidases (E.C.3.2.1.18) belong to a group of glycohydrolytic enzymes, widely distributed in nature, which remove sialic acid residues from glycoproteins and glycolipids. All of the sialidase so far characterized at the molecular level share an Asp block, repeated three to five times in the primary structure, and an F/YRIP sequence motif which is part of the active site. Using a sequence homology ...
... We have examined the pattern of expression of the Lewis group carbohydrate antigens during the development of African toad Xenopus laevis. One of these antigens, Lewis x (Leˣ, also known as SSEA-1), was previously shown to be involved in cell-cell adhesion in early mouse embryos and teratocarcinoma stem cells. Recently another member of these antigens, sialyl-Leˣ, was found to be one of the major ...
Western blotting; antibodies; autocrine signaling; breast neoplasms; cell growth; cell lines; estrogens; glycosylation; insulin-like growth factor I; insulin-like growth factor I receptor; melanoma; membrane proteins; neoplasm cells; phosphates; plasma membrane; protein phosphorylation; receptors; tritium
Abstract:
... In this study we provide evidence that the low expression of IGF-1R at the cell surface of estrogen-independent breast cancer cells is due to a low rate of e novo synthesis of dolichyl phosphate. The analyses were performed on the estrogen receptor-negative breast cancer cell line MDA231 and, in comparison, the melanoma cell line SK-MEL-2, which expresses a high number of plasma membrane-bound IGF ...
Western blotting; albumins; cell growth; cell proliferation; hepatocytes; in vitro culture; liver; neonates; pregnancy; rats; transcription factors; tumor suppressor genes
Abstract:
... We examined the relationship between cell proliferation and differentiation of cultured rat fetal and newborn hepatocytes isolated from various developmental stages. The albumin production rate increased along with cell growth under in vitro culture and became maximal two days after the growth cessation. AFP was secreted by both fetal and newborn hepatocytes with growth ability. Furthermore, the r ...
... The acid phosphatase and hemagglutinating activities of four species of Cucurbitaceae were determined during seeds germination and seedlings development. In all cases traces of enzyme and hemagglutinating activities were found in dry and imbibided seeds. In developing seedlings of Cucumis sativus the activities increased to maximum on the 3rd day while in other species on the 6th day of germinatio ...
Western blotting; affinity chromatography; anti-inflammatory agents; autoimmune diseases; binding proteins; drug interactions; glyceraldehyde-3-phosphate dehydrogenase; glycolysis; macrophages; mechanism of action; metabolites; phosphoglycerate kinase; pyruvate kinase; sequence analysis
Abstract:
... The isoxazole derivative Leflunomide (HWA 486) is a novel immunoregulatory and anti‐inflammatory drug. Affinity chromatography was used to purify and identify Leflunomide binding proteins, which might play a role as potential cellular targets in the molecular mode of action. The Leflunomide derivative A 0273 was covalently coupled to a Fractogel® matrix. This column was used to separate a cytosoli ...
... Insects are useful models for the study of innate immune mechanisms because of their lack of antibodies and receptors involved in adaptive immune response. Nevertheless, hemolin cloned from moths is a soluble and membrane associated Ig‐related molecule that is up‐regulated during immune response [Lanz‐Mendoza, H. & Faye, I. (1999) Dev. Comp. Immunol.23, 359–374]. The hemolin monomeric form has fou ...
Western blotting; antibodies; dose response; guanosine triphosphate; hepatoma; insulin; insulin receptors; membrane proteins; pertussis toxin; plasma membrane; rats; signal transduction
Abstract:
... Insulin action is initiated by binding to its cognate receptor, which then triggers multiple cellular responses by activating different signaling pathways. There is evidence that insulin receptor signaling may involve G protein activation in different target cells. We have studied the activation of G proteins in rat hepatoma (HTC) cells. We found that insulin stimulated binding of guanosine 5′-O-( ...
DNA; RNA; Western blotting; binding sites; cell proliferation; glucose; hepatoma; insulin; insulin receptors; insulin-like growth factor I; insulin-like growth factor I receptor; metabolism; mitogen-activated protein kinase; mitogen-activated protein kinase kinase; mitogen-activated protein kinase kinase kinase; phosphorylation; tyrosine
Abstract:
... The proliferation and metabolism of H4IIE hepatoma cells is apparently mediated through the insulin receptor. These cells, however, also have high‐affinity binding sites for insulin‐like growth factor‐I (IGF‐I). Addition of insulin to H4IIE cells increased RNA synthesis, DNA synthesis and cell number. IGF‐I, on the other hand, was ineffective at concentrations equivalent to the lowest effective in ...