ID   CRYAB_COLLI             Reviewed;          52 AA.
AC   O12987;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-JUL-1997, sequence version 1.
DT   25-MAY-2022, entry version 57.
DE   RecName: Full=Alpha-crystallin B chain;
DE   AltName: Full=Alpha(B)-crystallin;
DE   Flags: Fragment;
GN   Name=CRYAB;
OS   Columba livia (Rock dove).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC   Coelurosauria; Aves; Neognathae; Columbiformes; Columbidae; Columba.
OX   NCBI_TaxID=8932;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=9126559; DOI=10.1006/mpev.1996.0384;
RA   Caspers G.J., Uit de Weerd D., Wattel J., de Jong W.W.;
RT   "Alpha-crystallin sequences support a galliform/anseriform clade.";
RL   Mol. Phylogenet. Evol. 7:185-188(1997).
CC   -!- FUNCTION: May contribute to the transparency and refractive index of
CC       the lens.
CC   -!- SUBUNIT: Homodimer. Aggregates with homologous proteins, including
CC       alpha-A-crystallin and the small heat shock protein HSPB1, to form
CC       large heteromeric complexes (By similarity). {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the small heat shock protein (HSP20) family.
CC       {ECO:0000255|PROSITE-ProRule:PRU00285}.
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DR   EMBL; X96594; CAA65412.1; -; Genomic_DNA.
DR   AlphaFoldDB; O12987; -.
DR   STRING; 8932.XP_005500801.1; -.
DR   eggNOG; KOG3591; Eukaryota.
DR   GO; GO:0042803; F:protein homodimerization activity; ISS:UniProtKB.
DR   GO; GO:0005212; F:structural constituent of eye lens; IEA:UniProtKB-KW.
DR   InterPro; IPR003090; Alpha-crystallin_N.
DR   Pfam; PF00525; Crystallin; 1.
PE   3: Inferred from homology;
KW   Eye lens protein.
FT   CHAIN           <1..>52
FT                   /note="Alpha-crystallin B chain"
FT                   /id="PRO_0000125918"
FT   NON_TER         1
FT   NON_TER         52
SQ   SEQUENCE   52 AA;  6078 MW;  B4FC7ECF2EB79FE5 CRC64;
     LIRRPLLSWL APSRIFDQIF GEHLQESELL PASPSFSPFL MRSPILRMPS WL