Fig. 5.8.
GIT1/βPIX/PAK1/paxillin complex. PAK1 binds to the N-terminal SH3-domain of βPIX. βPIX has a DBL-homology (DH) domain and a plextrin homology (PH) domain, and binds to GIT1 through a C-terminal GIT1-binding domain. GIT1 has a C-terminal paxillin-binding domain (PAX) that binds to the LD4 domain of paxillin and SHD domain that binds to βPIX. PAK1 can phosphorylate Ser273 of paxillin at adhesion complexes