ID   CRYAB_TRASE             Reviewed;          52 AA.
AC   Q91518;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 63.
DE   RecName: Full=Alpha-crystallin B chain;
DE   AltName: Full=Alpha(B)-crystallin;
DE   Flags: Fragment;
GN   Name=CRYAB;
OS   Trachemys scripta elegans (Red-eared slider turtle).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Archelosauria; Testudinata; Testudines; Cryptodira; Durocryptodira;
OC   Testudinoidea; Emydidae; Trachemys.
OX   NCBI_TaxID=31138;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Lens;
RX   PubMed=8662010; DOI=10.1007/bf02352288;
RA   Caspers G.J., Reinders G.J., Leunissen J.A.M., Wattel J., de Jong W.W.;
RT   "Protein sequences indicate that turtles branched off from the amniote tree
RT   after mammals.";
RL   J. Mol. Evol. 42:580-586(1996).
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; U31939; AAB08830.1; -; mRNA.
DR   AlphaFoldDB; Q91518; -.
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   2: Evidence at transcript level;
KW   Eye lens protein.
FT   CHAIN           <1..>52
FT                   /note="Alpha-crystallin B chain"
FT                   /id="PRO_0000125922"
FT   NON_TER         1
FT   NON_TER         52
SQ   SEQUENCE   52 AA;  6010 MW;  8D31D3C4A3B84F27 CRC64;
     LIRRPLFSFL TPTRIFDQSF GEHLSESELF PTSGALSPFL LRSPFLRTPS WL