Catalytic subunit of the Rab3 GTPase-activating (Rab3GAP) complex composed of RAB3GAP1 and RAB3GAP2, which has GTPase-activating protein (GAP) activity towards various Rab3 subfamily members (RAB3A, RAB3B, RAB3C and RAB3D), RAB5A and RAB43, and guanine nucleotide exchange factor (GEF) activity towards RAB18 (PubMed:10859313, PubMed:24891604, PubMed:9030515). As part of the Rab3GAP complex, acts as a GAP for Rab3 proteins by converting active RAB3-GTP to the inactive form RAB3-GDP (PubMed:10859313). Rab3 proteins are involved in regulated exocytosis of neurotransmitters and hormones (PubMed:15696165). The Rab3GAP complex, acts as a GEF for RAB18 by promoting the conversion of inactive RAB18-GDP to the active form RAB18-GTP (PubMed:24891604). Required for recruiting and activating RAB18 at the endoplasmic reticulum (ER) membrane where it maintains proper ER structure (PubMed:24891604). Required for normal eye and brain development (PubMed:15696165, PubMed:23420520). May participate in neurodevelopmental processes such as proliferation, migration and differentiation before synapse formation, and non-synaptic vesicular release of neurotransmitters (PubMed:9030515, PubMed:9852129). {ECO:0000269|PubMed:10859313, ECO:0000269|PubMed:15696165, ECO:0000269|PubMed:23420520, ECO:0000269|PubMed:24891604, ECO:0000269|PubMed:9030515, ECO:0000269|PubMed:9852129}.

Matrix Type

  • Plasma
  • Tissue/Cells

Gene Symbol

  • RAB3GAP1

UniProt ID

  • Q15042

Request the RB3GP Assay

Tell us a little more about your study so we can optimize the assay for your specific needs.

"*" indicates required fields

This field is for validation purposes and should be left unchanged.