Biology:Bacterial ice-nucleation proteins

From HandWiki
Bacterial ice-nucleation proteins octamer repeat
Identifiers
SymbolIce_nucleatn
PfamPF00818
InterProIPR000258
PROSITEPDOC00283

Bacterial ice-nucleation proteins is a family of proteins that enable Gram-negative bacteria to promote nucleation of ice at relatively high temperatures (above -5C).[1][2] These proteins are localised at the outer membrane surface and can cause frost damage to many plants. The primary structure of the proteins contains a highly repetitive domain that dominates the sequence. The domain comprises a number of 48-residue repeats, which themselves contain 3 blocks of 16 residues, the first 8 of which are identical. It is thought that the repetitive domain may be responsible for aligning water molecules in the seed crystal.

             [.........48.residues.repeated.domain..........]
            /              / |              | \              \
           AGYGSTxTagxxssli  AGYGSTxTagxxsxlt  AGYGSTxTaqxxsxlt
           [16.residues...]  [16.residues...]  [16.residues...]

See also

References

  1. "Detection of bacteria by transduction of ice nucleation genes". Trends in Biotechnology 8 (10): 276–9. October 1990. doi:10.1016/0167-7799(90)90195-4. PMID 1366726. 
  2. "Bacterial ice nucleation: significance and molecular basis". FASEB Journal 7 (14): 1338–43. November 1993. doi:10.1096/fasebj.7.14.8224607. PMID 8224607. 
This article incorporates text from the public domain Pfam and InterPro: IPR000258