Other Ras GTPase Compounds Small Molecules and Peptides

RAS Structure and Function

There are three human RAS genes; HRAS, KRAS and NRAS, which encode four highly related 188-189 amino acid proteins, HRAS, KRAS4A, KRAS4B and NRAS. KRAS encodes two spice variants, with 4B being widely expressed and 4A more tissue restricted. The C-terminal 24/25 amino acid sequence exhibits the greatest divergence between the different isoforms and contain sequences that facilitate membrane interactions.

Ras proteins function as GDP-GTP regulated binary on-off ...