Proto-oncogene DBL (MCF2)

Guanine nucleotide exchange factor (GEF) that governs the Rho family of GTPases. Promotes the conversion of some member of the Rho family GTPase from the GDP-bound to the GTP-bound form.

Isoform 1 exhibits no action toward RHOA, RAC1 or CDC42. Isoform 2 exhibits decreased GEF activity toward CDC42.