Gamma-crystallin B is a protein that in humans is encoded by the CRYGB gene.[5]

CRYGB
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesCRYGB, CRYG2, CTRCT39, crystallin gamma B
External IDsOMIM: 123670; MGI: 88522; HomoloGene: 3816; GeneCards: CRYGB; OMA:CRYGB - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_005210

NM_144761

RefSeq (protein)

NP_005201

NP_658906

Location (UCSC)Chr 2: 208.14 – 208.15 MbChr 1: 65.12 – 65.12 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Crystallins are separated into two classes: taxon-specific, or enzyme, and ubiquitous. The latter class constitutes the major proteins of vertebrate eye lens and maintains the transparency and refractive index of the lens. Since lens central fiber cells lose their nuclei during development, these crystallins are made and then retained throughout life, making them extremely stable proteins.

Mammalian lens crystallins are divided into alpha, beta, and gamma families; beta and gamma crystallins are also considered as a superfamily. Alpha and beta families are further divided into acidic and basic groups. Seven protein regions exist in crystallins: four homologous motifs, a connecting peptide, and N- and C-terminal extensions.

Gamma-crystallins are a homogeneous group of highly symmetrical, monomeric proteins typically lacking connecting peptides and terminal extensions. They are differentially regulated after early development. Four gamma-crystallin genes (gamma-A through gamma-D) and three pseudogenes (gamma-E, gamma-F, gamma-G) are tandemly organized in a genomic segment as a gene cluster. Whether due to aging or mutations in specific genes, gamma-crystallins have been involved in cataract formation.[5]

References

edit
  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000182187Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000073658Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ a b "Entrez Gene: CRYGB crystallin, gamma B".
edit

Further reading

edit