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... From micro to planetary scales, spatial heterogeneity—patchiness—is ubiquitous in ecosystems, defining the environments in which organisms move and interact. However, most large‐scale models still use spatially averaged ‘mean fields’ to represent natural populations, while fine‐scale spatially explicit models are mostly restricted to particular organisms or systems. In a conceptual paper, Grünbaum ...
Pseudoalteromonas, etc ; Danio rerio; antifouling activities; biofouling; cornea; topography; transmittance; wavelengths; Show all 8 Subjects
Abstract:
... Surface topography has been demonstrated as an effective nonchemical strategy for controlling the fouling resistance of a surface, but its impact on optical transparency remains a barrier to the application of this strategy in optical materials. To reconcile the conflicting effects of surface topography on optical transparency and fouling resistance, here we study the optical properties and antifo ...
Pseudoalteromonas, etc ; amino acids; antibacterial properties; fatty acids; hemolymph; hydroxylation; mass spectrometry; new family; oysters; Show all 9 Subjects
Abstract:
... Five strains of Pseudoalteromonas, isolated from oyster haemolymph, have exhibited antibacterial activity against several Gram-negative bacteria. Bioactive compounds have been identified in their cell-free supernatant and characterised as alterins, which are cyclolipopeptides comprising a heptapeptidic ring connected to a fatty acid chain. Using ultra-performance liquid chromatography–high-resolut ...
Pseudoalteromonas, etc ; active sites; biotechnology; catalytic activity; food chemistry; hydrolysis; mechanism of action; oligosaccharides; sequence analysis; thermal stability; Show all 10 Subjects
Abstract:
... κ-Carrageenase is an important component for κ-carrageenan oligosaccharide production. Generally, noncatalytic domains are appended to carbohydrate-active domains and potentiate catalytic activity. However, studies devoted to κ-carrageenase are relatively few. Here, a C-terminal bacterial immunoglobulin-like domain (Big_2) was identified in κ-carrageenase (PpCgk) from Pseudoalteromonas porphyrae. ...
Pseudoalteromonas, etc ; Santalum yasi; autoregulation; lactones; research; Show all 5 Subjects
Abstract:
... Gram-negative bacteria usually use acyl-homoserine lactones (AHLs)-mediated LuxI/LuxR-type quorum sensing (QS) systems for cell-cell cooperation and/or bacteria-environment communication. LuxI and LuxR are AHLs synthase and receptor, respectively. These two parts could form a positive regulatory feedback loop, controlling various types of group behaviors. However, the autoregulation mechanisms bet ...
... As an important enzyme involved in the marine carbon cycle, alginate lyase has received extensive attention because of its excellent degradation ability on brown algae, which is widely utilized for alginate oligosaccharide preparation or bioethanol production. In comparison with endo-type alginate lyases (PL-5, PL-7, and PL-18 families), limited studies have focused on PL-17 family alginate lyases ...
... Saccharina japonica is a commercially farmed seaweed of global importance. However, disease occurrence during different stages of cultivation can result in substantial economic losses. Identification of the causative agents of disease remains a significant bottleneck to the large scale cultivation of S. japonica. In this study, an aerobic heterotrophic, flagellated, rod-shaped Gram-negative bacter ...
Pseudoalteromonas, etc ; Aspergillus; Pseudomonas; biofilm; environment; fungi; poly(vinyl chloride); Show all 7 Subjects
Abstract:
... Most previous studies on antifouling (AF) agents have focused on the influence of biofilm formation constituted by single or multiple cultured microbial species, and very few studies have analyzed the relationship between environmentally friendly AF compounds and marine fouling microbial communities (MFMCs). This is the first investigation of the impact of three environmentally friendly alkaloids ...
Pseudoalteromonas, etc ; biofilm; biosynthesis; biotechnology; epiphytes; liquids; microbiome; secondary metabolites; Show all 8 Subjects
Abstract:
... Most members of the Pseudoalteromonas genus have been isolated from living surfaces as members of epiphytic and epizooic microbiomes on marine macroorganisms. Commonly Pseudoalteromonas isolates are reported as a source of bioactive exoproducts, i.e., secondary metabolites, such as exopolymeric substances and extracellular enzymes. The experimental conditions for the production of these agents are ...
Pseudoalteromonas, etc ; Colwellia; ampicillin; anaerobic ammonium oxidation; antibiotic resistance; aquatic environment; evolution; microbial communities; nitrogen; salt tolerance; sludge; symbiosis; total nitrogen; wastewater; wastewater treatment; Show all 15 Subjects
Abstract:
... Global spread of ampicillin (AMP) in the aquatic environment have attracted much attention recently. Marine anammox bacteria (MAB) have potentials in saline wastewater treatment due to their good salt tolerance. However, to date, the effect resulting from AMP on MAB is still unknown. Herein, the effect of AMP on MAB, involving microbial community evolution and genetic response, was investigated fo ...
Pseudoalteromonas, etc ; Achromobacter; Acinetobacter baumannii; DNA; Siphoviridae; antibiotic resistance; bacteriophages; databases; genome; host range; multiple drug resistance; pH; pathogens; phylogeny; polyacrylamide gel electrophoresis; sequence analysis; Show all 16 Subjects
Abstract:
... Multidrug-resistant Acinetobacter baumannii (MDRAB) is a pathogen recognized as antimicrobial-resistant bacteria involved in healthcare-associated infections. Resistance to antibiotics has made alternative therapies necessary. Bacteriophage therapy is considered a potential solution to treat MDRAB. In this study, we isolated and characterized the phage vB_AbaS_TCUP2199 (TCUP2199), which can infect ...
Pseudoalteromonas, etc ; Vibrio harveyi; agar; bacteria; biological control; coculture; ethyl acetate; gas chromatography-mass spectrometry; mariculture; minimum inhibitory concentration; nucleotide sequences; research; sequence analysis; vibriosis; Indonesia; Show all 15 Subjects
Abstract:
... We isolated Pseudoalteromonas xiamenensis STKMTI.2 from the mangrove sediments of Setokok Island, Indonesia. This study aimed to identify the bacterium, investigate antagonistic properties and minimum inhibitory concentration, and detect the active compounds using gas chromatography–mass spectrometry. The bacterium was identified using a biochemical test and 16S rDNA sequence analysis. Bioactive c ...
Pseudoalteromonas distincta, etc ; aquatic ecosystems; carbon; genomics; microscopy; phosphates; polysaccharides; Antarctic region; Show all 8 Subjects
Abstract:
... Outer membrane extensions are common in many marine bacteria. However, the function of these surface enlargements or extracellular compartments is poorly understood. Using a combined approach of microscopy and subproteome analyses, we therefore examined Pseudoalteromonas distincta ANT/505, an Antarctic polysaccharide degrading gamma‐proteobacterium. P. distincta produced outer membrane vesicles (M ...
Pseudoalteromonas, etc ; Psychrobacter; biogeography; genes; genomics; geographical isolation; Antarctic region; Arctic region; Show all 8 Subjects
Abstract:
... Based on 16S rRNA gene analyses, the same bacterial operational taxonomic units (OTUs) are common to both the Arctic and Antarctic oceans, supporting the concept ‘everything is everywhere’. However, whether the same OTUs from both poles have identical genomes, i.e. whether ‘everything is still everywhere’ at the genomic level has not yet been examined systematically. Here, we isolated, sequenced a ...
Pseudoalteromonas, etc ; Arcobacter; Photobacterium; Thalassomonas; Vibrio; biofilm; genes; lifestyle; seawater; species richness; Show all 10 Subjects
Abstract:
... Marine biofilms are a collective of microbes that can grow on many different surfaces immersed in marine environments. Estimating the microbial richness and specificity of a marine biofilm community is a challenging task due to the high complexity in comparison with seawater. Here, we compared the resolution of full-length 16S rRNA gene sequencing technique of a PacBio platform for microbe identif ...
Pseudoalteromonas rubra, etc ; 2,2-diphenyl-1-picrylhydrazyl; antioxidants; ethanol; methanol; solvents; water content; Show all 7 Subjects
Abstract:
... Antioxidants prevent ageing and are usually quantified and screened using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. However, this assay cannot be used for salt-containing samples, such as the cell-free supernatants of marine microorganisms that are aggregated under these conditions. Herein, the DPPH solvent (methanol or ethanol) and its water content were optimized to enable the analysis of ...
Pseudoalteromonas, etc ; Escherichia; bacteriophages; environment; genes; quantitative polymerase chain reaction; soil; surface water; Show all 8 Subjects
Abstract:
... Marine phages have been applied to trace ground- and surface water flows. Yet, information on their transport in soil and related particle intactness is limited. Here we compared the breakthrough of two lytic marine tracer phages (Pseudoalteromonas phages PSA-HM1 and PSA-HS2) with the commonly used Escherichia virus T4 in soil- and sand-filled laboratory percolation columns. All three phages showe ...
... Among the widespread malignancies colorectal cancer is the most lethal. Treatments of this malignant tumor include surgery for lesions and metastases, radiotherapy, immunotherapy, and chemotherapy. Nevertheless, novel therapies to reduce morbidity and mortality are demanding. Natural products, such as polysaccharides, can be a valuable alternative to sometimes very toxic chemotherapeutical agents, ...
T.G. Sumithra; S. Gayathri; S.R. Krupesha Sharma; Sanal Ebeneezar; K.K. Anikuttan; K.A. Sajina; G. Iyyapparaja Narasimapallavan; K.J. Reshma; R. Vishnu; G. Tamilmani; M. Sakthivel; P. Rameshkumar; D. Linga Prabu; P. Vijayagopal; A. Gopalakrishnan
... Cobia (Rachycentron canadum) is a high-value marine aquaculture species. Knowledge of the microbial dynamics in various aquaculture operations is crucial for developing suitable management practices. The present study revealed the critical dysbiotic events in the whole larval and juvenile-gut microbiome of cobia, through an inevitable aquaculture operation, viz. live transportation. The results th ...
Pseudoalteromonas, etc ; Western blotting; artificial skin; fluorescence; humans; melanin; melanocytes; melanoma; mice; models; ubiquinones; Show all 11 Subjects
Abstract:
... An ubiquinone derivative, pseudoalteromone A (1), has been isolated from two marine-derived Pseudoalteromonas spp., APmarine002 and ROA-050, and its anti-melanogenesis activity was investigated. The anti-melanogenic capacity of pseudoalteromone A was demonstrated by assessing the intracellular and extracellular melanin content and cellular tyrosinase activity in the B16 cell line, Melan-a mouse me ...