ABR

Isoform Short of Active breakpoint cluster region-related protein;Active breakpoint cluster region-related protein; Isoform 4 of Active breakpoint cluster region-related protein;Isoform Short of Active breakpoint cluster region-related protein

Protein with a unique structure having two opposing regulatory activities toward small GTP-binding proteins. The C-terminus is a GTPase-activating protein domain which stimulates GTP hydrolysis by RAC1, RAC2 and CDC42. Accelerates the intrinsic rate of GTP hydrolysis of RAC1 or CDC42, leading to down-regulation of the active GTP-bound form (PubMed:17116687, PubMed:7479768). The central Dbl homology (DH) domain functions as a guanine nucleotide exchange factor (GEF) that modulates the GTPases CDC42, RHOA and RAC1. Promotes the conversion of CDC42, RHOA and RAC1 from the GDP-bound to the GTP-bound form (PubMed:7479768). Functions as an important negative regulator of neuronal RAC1 activity (By similarity). Regulates macrophage functions such as CSF-1 directed motility and phagocytosis through the modulation of RAC1 activity (By similarity).

Matrix Type

  • Tissue/Cells

Gene Symbol

  • ABR

UniProt ID

  • Q12979
  • Q12979-2
  • Q12979-4

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