Title : Effector proteins exert an important influence on the signaling-active state of the small GTPase Cdc42.

Pub. Date : 2008 May 16

PMID : 18348980






4 Functional Relationships(s)
Download
Sentence
Compound Name
Protein Name
Organism
1 Here we describe the high resolution x-ray crystal structure for Cdc42 bound to the GTP analog guanylyl beta,gamma-methylene-diphosphonate (GMP-PCP) (i.e. the presumed signaling-active state) and show that it is virtually identical to the structures for the signaling-inactive, GDP-bound form of the protein, contrary to what has been reported for Ras and other G-proteins. Guanosine Diphosphate cell division cycle 42 Homo sapiens
2 Especially surprising was that the GMP-PCP- and GDP-bound forms of Cdc42 did not show detectable differences in their Switch I and Switch II loops. Guanosine Diphosphate cell division cycle 42 Homo sapiens
3 An examination of the available structures for Cdc42 complexed to different effector proteins, versus the x-ray crystal structure for GMP-PCP-bound Cdc42, provides a possible explanation for how effectors can distinguish between the GTP- and GDP-bound forms of this G-protein and ensure that the necessary conformational changes for signal propagation occur. Guanosine Diphosphate cell division cycle 42 Homo sapiens
4 An examination of the available structures for Cdc42 complexed to different effector proteins, versus the x-ray crystal structure for GMP-PCP-bound Cdc42, provides a possible explanation for how effectors can distinguish between the GTP- and GDP-bound forms of this G-protein and ensure that the necessary conformational changes for signal propagation occur. Guanosine Diphosphate cell division cycle 42 Homo sapiens