Model metabolic strategy for heterotrophic bacteria in the cold ocean based on Colwellia psychrerythraea 34H
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چکیده
منابع مشابه
Motility of Colwellia psychrerythraea strain 34H at subzero temperatures.
We examined the Arctic bacterium Colwellia psychrerythraea strain 34H for motility at temperatures from -1 to -15 degrees C by using transmitted-light microscopy in a temperature-controlled laboratory. The results, showing motility to -10 degrees C, indicate much lower temperatures to be permissive of motility than previously reported (5 degrees C), with implications for microbial activity in f...
متن کاملPurification, characterization, and sequencing of an extracellular cold-active aminopeptidase produced by marine psychrophile Colwellia psychrerythraea strain 34H.
The limited database on cold-active extracellular proteases from marine bacteria was expanded by successful purification and initial biochemical and structural characterization of a family M1 aminopeptidase (designated ColAP) produced by the marine psychrophile Colwellia psychrerythraea strain 34H. The 71-kDa enzyme displayed a low optimum temperature (19 degrees C) and narrow pH range (pH 6 to...
متن کاملCrystal structure and functional characterization of an isoaspartyl dipeptidase (CpsIadA) from Colwellia psychrerythraea strain 34H
Isoaspartyl dipeptidase (IadA) is an enzyme that catalyzes the hydrolysis of an isoaspartyl dipeptide-like moiety, which can be inappropriately formed in proteins, between the β-carboxyl group side chain of Asp and the amino group of the following amino acid. Here, we have determined the structures of an isoaspartyl dipeptidase (CpsIadA) from Colwellia psychrerythraea, both ligand-free and that...
متن کاملEffect of cerulenin on fatty acid composition and gene expression pattern of DHA-producing strain Colwellia psychrerythraea strain 34H
BACKGROUND Colwellia psychrerythraea 34H is a psychrophilic bacterium able to produce docosahexaenoic acid (DHA). Polyketide synthase pathway is assumed to be responsible for DHA production in marine bacteria. RESULTS Five pfa genes from strain 34H were confirmed to be responsible for DHA formation by heterogeneous expression in Escherichia coli. The complexity of fatty acid profile of this s...
متن کاملA unique capsular polysaccharide structure from the psychrophilic marine bacterium Colwellia psychrerythraea 34H that mimics antifreeze (glyco)proteins.
The low temperatures of polar regions and high-altitude environments, especially icy habitats, present challenges for many microorganisms. Their ability to live under subfreezing conditions implies the production of compounds conferring cryotolerance. Colwellia psychrerythraea 34H, a γ-proteobacterium isolated from subzero Arctic marine sediments, provides a model for the study of life in cold ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2018
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1807804115