Cited by 126Polar Research and EcologyBacterial Genetics and BiotechnologyGenomics and Phylogenetic Studies

Genomics of an extreme psychrophile, Psychromonas ingrahamii

Open access
Riley, Monica, Staley, James T, Danchin, Antoine, Wang, Ting Zhang, Brettin, Thomas S, Hauser, Loren J, Land, Miriam L, Thompson, Linda S·2008·BMC Genomics

Abstract

BACKGROUND: The genome sequence of the sea-ice bacterium Psychromonas ingrahamii 37, which grows exponentially at -12C, may reveal features that help to explain how this extreme psychrophile is able to grow at such low temperatures. Determination of the whole genome sequence allows comparison with genes of other psychrophiles and mesophiles. RESULTS: Correspondence analysis of the composition of all P. ingrahamii proteins showed that (1) there are 6 classes of proteins, at least one more than other bacteria, (2) integral inner membrane proteins are not sharply separated from bulk proteins suggesting that, overall, they may have a lower hydrophobic character, and (3) there is strong opposition between asparagine and the oxygen-sensitive amino acids methionine, arginine, cysteine and histidine and (4) one of the previously unseen clusters of proteins has a high proportion of "orphan" hypothetical proteins, raising the possibility these are cold-specific proteins. Based on annotation of proteins by sequence similarity, (1) P. ingrahamii has a large number (61) of regulators of cyclic GDP, suggesting that this bacterium produces an extracellular polysaccharide that may help sequester water or lower the freezing point in the vicinity of the cell. (2) P. ingrahamii has genes for production of the osmolyte, betaine choline, which may balance the osmotic pressure as sea ice freezes. (3) P. ingrahamii has a large number (11) of three-subunit TRAP systems that may play an important role in the transport of nutrients into the cell at low temperatures. (4) Chaperones and stress proteins may play a critical role in transforming nascent polypeptides into 3-dimensional configurations that permit low temperature growth. (5) Metabolic properties of P. ingrahamii were deduced. Finally, a few small sets of proteins of unknown function which may play a role in psychrophily have been singled out as worthy of future study. CONCLUSION: The results of this genomic analysis provide a springboard for further investigations into mechanisms of psychrophily. Focus on the role of asparagine excess in proteins, targeted phenotypic characterizations and gene expression investigations are needed to ascertain if and how the organism regulates various proteins in response to growth at lower temperatures.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1186/1471-2164-9-210

Cites

39 of 39 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Riley, M., Staley, J. T., Danchin, A., Wang, T. Z., Brettin, T. S., Hauser, L. J., Land, M. L., & Thompson, L. S.
Affiliations
  • Marine Biological Laboratory (US)
  • University of Washington (US)
  • Centre National de la Recherche Scientifique (FR)
  • Los Alamos National Laboratory (US)
  • Oak Ridge National Laboratory (US)
Corresponding author
Riley, Monica
Venue
BMC Genomics
Published
2008
Volume
9
Issue
1
Pages
210
ISSN
1471-2164 (ISSN-L)
OpenAlex
W1970019238
Cited by
126
References
39
Citations by year
2026: 2 · 2025: 3 · 2024: 2 · 2023: 3 · 2022: 7 · 2021: 8 · 2020: 2 · 2019: 5 · 2018: 9 · 2017: 12 · 2016: 7 · 2015: 6 · 2014: 10 · 2013: 12 · 2012: 11
FWCI
7.79
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • BMC Genomics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Open Access Server of the Woods Hole Scientific Community (Woods Hole Scientific Community) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • National Science Foundation (DEAC02-05CH11231, DEAC05- 00OR22725, 00OR22725, W-7405-ENG-36)
  • U.S. Department of Energy (-AC02-05CH11231, AC05-00OR22725, W-7405, Contract No. DE-AC02-05-CH11231, DE--AC05--00OR22725, DE‐FG02‐, DE-AC05?, Contract No. DE-AC05-00OR22725, 05CH11231, FG02-04ER63940, No. DE-AC02-05-CH11231, DE AC02 05CH11231, -7405-ENG-48, W‐7405‐ENG‐48, No. DE-AC05-00OR22725, W-7405-ENG-36, 00OR22725, DE-AC02-)
  • National Aeronautics and Space Administration (DE-AC02-05CH11231, DE-AC05-00OR22725)
  • University of Washington
  • European Commission (DE-AC05-00OR22725, DE-AC02-05CH11231)
  • Office of Science (DEAC05- 00OR22725, No. DE-AC02- 05-CH11231, No. DE-AC05-00OR22725, DEAC02–05CH11231, AC02-05CH11231, DE-AC02, 05CH11231, Contract No. DE-AC02-05CH11231, AC05-00OR22725)
  • Biological and Environmental Research (W-7405-Eng-48, 05CH11231, No. DE-AC02-05CH11231, DE-AC02 − 05CH11231, 00OR22725, Contract No. DE-AC02-05CH11231, DE‐AC05–00OR22725, AC02-05CH11231)
  • Lawrence Livermore National Laboratory (W-7405-ENG 48, -7405-Eng-48, DE-AC05-00OR22725, W-7405-ENG-36, W-7405-ENG, DE-AC02-05CH11231)
  • Oak Ridge National Laboratory (AC05-00OR22725, Contract No. DE-AC05-00OR22725, DE-AC0205CH11231, DE-AC05-00OR22725)
  • Lawrence Berkeley National Laboratory (AC02‐05CH11231, DE-AC02-05CH11231, No. DE-AC02-05CH11231, DE-AC05-00OR22725, Contract No. DE-AC02-05CH11231, 05CH11231)
  • Los Alamos National Laboratory (W‐7405‐ENG‐36, DE-AC05-00OR22725, W-7405-Eng-48, DE-AC02-05CH11231)
Topics
  • Physical Sciences › Environmental Science › Ecology › Polar Research and Ecology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
sea ice bacteria, cold adaptation, protein composition, exopolysaccharides, osmolytes, nutrient transport, molecular chaperones, stress proteins, genome annotation
MeSH terms
Amino Acids, Bacterial Proteins, Base Composition, Cold Climate, DNA, Bacterial, Energy Metabolism, Fatty Acids, Genes, Bacterial, Multigene Family, Glucose, Heat-Shock Proteins, Ice, Molecular Weight, Seawater, Genome, Bacterial, Molecular Chaperones, Gammaproteobacteria, GC Rich Sequence, Genomics

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review