Abstract
Bacterial and yeast isolates recovered from a deep Antarctic ice core were screened for proteins with ice-binding activity, an indicator of adaptation to icy environments. A bacterial strain recovered from glacial ice at a depth of 3,519 m, just above the accreted ice from Subglacial Lake Vostok, was found to produce a 54 kDa ice-binding protein (GenBank EU694412) that is similar to ice-binding proteins previously found in sea ice diatoms, a snow mold, and a sea ice bacterium. The protein has the ability to inhibit the recrystallization of ice, a phenotype that has clear advantages for survival in ice.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Amino Acid Sequence
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Antarctic Regions
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Bacterial Proteins / chemistry
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Bacterial Proteins / metabolism*
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Carrier Proteins / chemistry
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Carrier Proteins / metabolism*
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Cytophaga / classification
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Cytophaga / genetics
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Cytophaga / metabolism
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DNA Primers
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DNA, Bacterial / genetics
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DNA, Bacterial / isolation & purification
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Ice / analysis*
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Ice Cover
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Molecular Sequence Data
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Phylogeny
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Polymerase Chain Reaction
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Recombinant Proteins / chemistry
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Recombinant Proteins / metabolism
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Shewanella / classification
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Shewanella / genetics
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Shewanella / metabolism
Substances
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Bacterial Proteins
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Carrier Proteins
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DNA Primers
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DNA, Bacterial
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Ice
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Recombinant Proteins