Proline-rich protein 5 (PRR5)

Subunit of mTORC2, which regulates cell growth and survival in response to hormonal signals. MTORC2 is activated by growth factors, however, in contrast to mTORC1, seems to be nutrient- insensitive.

MTORC2 appears to work upstream of Rho GTPases to regulate the actin cytoskeleton, probably by activating one or more Rho-type guanine nucleotide exchange factors. MTORC2 promotes the serum-induced formation of stress-fibers or F-actin.