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Arhgef1

Domain

The RGSL domain, also known as rgRGS domain, is necessary but not sufficient for GAP activity.

The DH domain is involved in interaction with CCPG1.

Function

Seems to play a role in the regulation of RhoA GTPase by guanine nucleotide-binding alpha-12 (GNA12) and alpha-13 (GNA13) subunits (PubMed:9641915, PubMed:9641916). Acts as GTPase-activating protein (GAP) for GNA12 and GNA13, and as guanine nucleotide exchange factor (GEF) for RhoA GTPase (PubMed:9641915, PubMed:9641916, PubMed:8810315, PubMed:30521495). Activated G alpha 13/GNA13 stimulates the RhoGEF activity through interaction with the RGS-like domain (PubMed:9641916). This GEF activity is inhibited by binding to activated GNA12 (PubMed:9641916). Mediates angiotensin-2-induced RhoA activation (PubMed:20098430).

Involvement in disease

Immunodeficiency 62

IMD62

An autosomal recessive, primary immunologic disorder characterized by recurrent severe respiratory tract infections and bronchiectasis, due to antibody deficiency. Affected individuals have an abnormal B cell immunophenotype, with low levels of circulating memory B cells.

None

The disease is caused by variants affecting the gene represented in this entry.

Post-translational modifications

Phosphorylated by PKCA. Angiotensin-2 induced Tyr-738 phosphorylation is mediated by JAK2.

Tissue specificity

Ubiquitously expressed.

Cellular localization

  • Cytoplasm
  • Membrane
  • Translocated to the membrane by activated GNA13 or LPA stimulation.

Alternative names

  • Rho guanine nucleotide exchange factor 1
  • 115 kDa guanine nucleotide exchange factor
  • Sub1.5
  • p115-RhoGEF
  • p115RhoGEF
  • ARHGEF1

Target type

Proteins

Molecular weight

102435Da