Aliases for SAG Gene
External Ids for SAG Gene
Previous GeneCards Identifiers for SAG Gene
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. [provided by RefSeq, Jul 2008]
GeneCards Summary for SAG Gene
SAG (S-Antigen Visual Arrestin) is a Protein Coding gene. Diseases associated with SAG include Retinitis Pigmentosa 47 and Oguchi Disease 1. Among its related pathways are Signaling by GPCR and Visual Cycle in Retinal Rods. Gene Ontology (GO) annotations related to this gene include phosphoprotein binding and opsin binding. An important paralog of this gene is ARRB1.
UniProtKB/Swiss-Prot Summary for SAG Gene
Binds to photoactivated, phosphorylated RHO and terminates RHO signaling via G-proteins by competing with G-proteins for the same binding site on RHO (By similarity). May play a role in preventing light-dependent degeneration of retinal photoreceptor cells (PubMed:9565049).