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You searched for: Subject term circular dichroism spectroscopy Remove constraint Subject term: circular dichroism spectroscopy Subject term Antarctica Remove constraint Subject term: Antarctica
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1. Functional Analysis of a Bacterial Antifreeze Protein Indicates a Cooperative Effect between Its Two Ice-Binding Domains

Author:
Wang Chen; Oliver Erin E.; Christner Brent C.; Luo Bing-Hao
Source:
Biochemistry 2016 v.55 no.28 pp. 3975-3983
ISSN:
1520-4995
Subject:
antifreeze proteins; bacteria; circular dichroism spectroscopy; cold tolerance; crystallization; gel chromatography; glaciers; hysteresis; ice; recombinant proteins; temperature; viability; Antarctica
Abstract:
... Antifreeze proteins make up a class of ice-binding proteins (IBPs) that are possessed and expressed by certain cold-adapted organisms to enhance their freezing tolerance. Here we report the biophysical and functional characterization of an IBP discovered in a bacterium recovered from a deep glacial ice core drilled at Vostok Station, Antarctica (IBPv). Our study showed that the recombinant protein ...
DOI:
10.1021/acs.biochem.6b00323

2. Light-adaptive state transitions in the Ross Sea haptophyte Phaeocystis antarctica and in dinoflagellate cells hosting kleptoplasts derived from it

Author:
Kostas Stamatakis; Panayiotis-Ilias Broussos; Angeliki Panagiotopoulou; Rebecca J. Gast; Maria Pelecanou; George C. Papageorgiou
Source:
Biochimica et biophysica acta 2019 v.1860 no.1 pp. 102-110
ISSN:
0005-2728
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; Miozoa; Phaeocystis; Rhodophyta; absorption; algae; amino acids; autotrophs; chlorophyll; circular dichroism spectroscopy; fluorescence; kleptoplasts; photosynthesis; ultraviolet radiation; Antarctica
Abstract:
... Light state transitions (STs) is a reversible physiological process that oxygenic photosynthetic organisms use in order to minimize imbalances in the electronic excitation delivery to the reaction centers of Photosystems I and II, and thus to optimize photosynthesis. STs have been studied extensively in plants, green algae, red algae and cyanobacteria, but sparsely in algae with secondary red alga ...
DOI:
10.1016/j.bbabio.2018.11.016

3. Water-Soluble Glutamic Acid Derivatives Produced in Culture by Penicillium solitum IS1-A from King George Island, Maritime Antarctica

Author:
Julie P. G. Rodríguez; Darlon I. Bernardi; Juliana R. Gubiani; Juliana Magalhães de Oliveira; Raquel P. Morais-Urano; Ariane F. Bertonha; Karin F. Bandeira; Jairo I. Q. Bulla; Lara D. Sette; Antonio G. Ferreira; João M. Batista; Thayná de Souza Silva; Raquel Alves dos Santos; Carlos H. G. Martins; Simone P. Lira; Marcos G. da Cunha; Daniela B. B. Trivella; Nathalia Grazzia; Natália E. S. Gomes; Fernanda Gadelha; Danilo C. Miguel; Ana Carolina G. Cauz; Marcelo Brocchi; Roberto G. S. Berlinck
Source:
Journal of natural products 2020 v.83 no.1 pp. 55-65
ISSN:
1520-6025
Subject:
Penicillium solitum; Porifera; antibiotics; circular dichroism spectroscopy; culture media; cytotoxicity; endophytes; enzyme inhibition; fungi; glutamic acid; proteasome endopeptidase complex; screening; secondary metabolites; spectral analysis; water solubility; Antarctica
Abstract:
... A new method of screening was developed to generate 770 organic and water-soluble fractions from extracts of nine species of marine sponges, from the growth media of 18 species of marine-derived fungi, and from the growth media of 13 species of endophytic fungi. The screening results indicated that water-soluble fractions displayed significant bioactivity in cytotoxic, antibiotic, anti-Leishmania, ...
DOI:
10.1021/acs.jnatprod.9b00635