InterPro Entry IPR001064

Crystallin

Database InterPro
Accession IPR001064; Crystallin (matches 132 proteins)
Name Crystallin
Type Domain
Dates 08-OCT-1999 (created)
05-DEC-2000 (last modified)
Signatures PS00225; CRYSTALLIN_BETAGAMMA (1586 proteins)
PR01367; BGCRYSTALLIN (102 proteins)
PF00030; crystall (113 proteins)
SM00247; XTALbg (129 proteins)
Abstract Crystallins are the dominant structural components of the eye lens. Among the different type of crystallins, the beta and gamma crystallins form a family of related proteins [1, 2]. Structurally, beta and gamma crystallins are composed of two similar domains which, in turn, are each composed of two similar motifs with the two domains connected by a short connecting peptide. Each motif, which is about forty amino acid residues long, is folded in a distinctive 'Greek key' pattern.
Examples
  • P02966 DESS_MYXXA: A calcium-binding protein from the sporulating bacterium Myxococcus xanthusa forms a major part of the spore coat
  • P46058 EDSP_CYNPY
  • P09353 SR3A_PHYPO: Spherulin 3a from the slime mold Physarum polycephalum. Spherulin 3a is a development specific protein synthesized in response to various kinds of stress leading to encystment and dormancy. The sequence of Spherulin 3a consists of two 'Greek key' motifs [3]
  • P06504 CRBS_BOVIN
  • Q91314 CB12_RANCA
  • P07317 CRBA_RANTE

  • View examples
References
  1. Wistow G.J., Piatigorsky J.
    Lens crystallins: the evolution and expression of proteins for a highly specialized tissue.
    Annu. Rev. Biochem. 57: 479-504(1988).
    [MEDLINE:89024580] [PUB00000056]
  2. Lubsen N.H., Aarts H.J.M., Schoenmakers J.G.G.
    The evolution of lenticular proteins: the beta- and gamma-crystallin super gene family.
    Prog. Biophys. Mol. Biol. 51: 47-76(1988).
    [MEDLINE:89113769] [PUB00004933]
  3. Wistow G.
    Evolution of a protein superfamily: relationships between vertebrate lens crystallins and microorganism dormancy proteins.
    J. Mol. Evol. 30: 140-145(1990).
    [MEDLINE:90189184] [PUB00003409]
Database links PROSITE doc; PDOC00197
Blocks; IPB001064
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