RGS20

The protein encoded by this gene belongs to the family of regulator of G protein signaling (RGS) proteins, which are regulatory and structural components of G protein-coupled receptor complexes. RGS proteins inhibit signal transduction by increasing the GTPase activity of G protein alpha subunits, thereby driving them into their inactive GDP-bound forms. This protein selectively binds to G(z)-alpha and G(alpha)-i2 subunits, and regulates their signaling activities. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

Full Name

Regulator Of G Protein Signaling 20

Function

Inhibits signal transduction by increasing the GTPase activity of G protein alpha subunits thereby driving them into their inactive GDP-bound form. Binds selectively to G(z)-alpha and G(alpha)-i2 subunits, accelerates their GTPase activity and regulates their signaling activities. The G(z)-alpha activity is inhibited by the phosphorylation and palmitoylation of the G-protein. Negatively regulates mu-opioid receptor-mediated activation of the G-proteins (By similarity).

Biological Process

Biological Process G protein-coupled receptor signaling pathwayTAS:Reactome
Biological Process negative regulation of signal transductionIEA:UniProtKB-KW
Biological Process regulation of G protein-coupled receptor signaling pathwayManual Assertion Based On ExperimentTAS:ProtInc

Cellular Location

Membrane
Nucleus
Cytoplasm
Shuttles between the cytoplasm/cell membrane and the nucleus. Anchored to the membrane through palmitoylation.

PTM

Fatty acylated. Heavily palmitoylated in the cysteine string motif (By similarity).
N- and O-glycosylated in synapsomal membranes.
Serine phosphorylated in synapsomal membranes.
Sumoylated with SUMO1 and SUMO2 in synaptosomes. The sumoylated forms act as a scaffold for sequestering mu-opioid receptor-activated G(alpha) subunits (By similarity).