An open conformation of switch I revealed by the crystal structure of a Mg2+-free form of RHOA complexed with GDP. Implications for the GDP/GTP exchange mechanism.
Shimizu, T., Ihara, K., Maesaki, R., Kuroda, S., Kaibuchi, K., Hakoshima, T.(2000) J.Biol.Chem. 275: 18311-18317
- PubMed: 10748207 
- DOI: 10.1074/jbc.M910274199
- PubMed Abstract: 
Mg(2+) ions are essential for guanosine triphosphatase (GTPase) activity and play key roles in guanine nucleotide binding and preserving the structural integrity of GTP-binding proteins. We determined the crystal structure of a small GTPase RHOA comp ...