1e0a
From Proteopedia
CDC42 COMPLEXED WITH THE GTPASE BINDING DOMAIN OF P21 ACTIVATED KINASE
Overview
The Rho family GTPases, Cdc42, Rac and Rho, regulate signal transduction pathways via interactions with downstream effector proteins. We report here the solution structure of Cdc42 bound to the GTPase binding domain of alphaPAK, an effector of both Cdc42 and Rac. The structure is compared with those of Cdc42 bound to similar fragments of ACK and WASP, two effector proteins that bind only to Cdc42. The N-termini of all three effector fragments bind in an extended conformation to strand beta2 of Cdc42, and contact helices alpha1 and alpha5. The remaining residues bind to switches I and II of Cdc42, but in a significantly different manner. The structure, together with mutagenesis data, suggests reasons for the specificity of these interactions and provides insight into the mechanism of PAK activation.
About this Structure
1E0A is a Protein complex structure of sequences from Homo sapiens and Rattus norvegicus. Full crystallographic information is available from OCA.
Reference
Structure of Cdc42 bound to the GTPase binding domain of PAK., Morreale A, Venkatesan M, Mott HR, Owen D, Nietlispach D, Lowe PN, Laue ED, Nat Struct Biol. 2000 May;7(5):384-8. PMID:10802735 Page seeded by OCA on Fri May 2 14:29:55 2008
