SAG (gene)

S-antigen; retina and pineal gland (arrestin)
Identifiers
Symbols SAG; DKFZp686D1084; DKFZp686I1383; RP47; S-AG
External IDs OMIM181031 MGI98227 HomoloGene455 GeneCards: SAG Gene
RNA expression pattern
More reference expression data
Orthologs
Species Human Mouse
Entrez 6295 20215
Ensembl ENSG00000130561 ENSMUSG00000056055
UniProt P10523 Q3UEW3
RefSeq (mRNA) NM_000541 NM_009118.2
RefSeq (protein) NP_000532 NP_033144.1
Location (UCSC) Chr 2:
234.22 – 234.26 Mb
Chr 1:
89.7 – 89.74 Mb
PubMed search [1] [2]

S-arrestin is a protein that in humans is encoded by the SAG gene.[1][2]

Members of arrestin/beta-arrestin protein family are thought to participate in agonist-mediated desensitization of G-protein-coupled receptors and cause specific dampening of cellular responses to stimuli such as hormones, neurotransmitters, or sensory signals. S-arrestin, also known as S-antigen, is a major soluble photoreceptor protein that is involved in desensitization of the photoactivated transduction cascade. It is expressed in the retina and the pineal gland and inhibits coupling of rhodopsin to transducin in vitro. Additionally, S-arrestin is highly antigenic, and is capable of inducing experimental autoimmune uveoretinitis. Mutations in this gene have been associated with Oguchi disease, a rare autosomal recessive form of night blindness.[2]

References

  1. ^ Yamaki K, Tsuda M, Kikuchi T, Chen KH, Huang KP, Shinohara T (Jan 1991). "Structural organization of the human S-antigen gene. cDNA, amino acid, intron, exon, promoter, in vitro transcription, retina, and pineal gland". J Biol Chem 265 (34): 20757–62. PMID 2249983. 
  2. ^ a b "Entrez Gene: SAG S-antigen; retina and pineal gland (arrestin)". http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=6295. 

Further reading