Activation of the superoxide-generating NADPH oxidase by chimeric proteins consisting of segments of the cytosolic component p67(phox) and the small GTPase Rac1.
Authors:Alloul N, Gorzalczany Y, Itan M, Sigal N, Pick E
Journal:Biochemistry
PubMed ID:11724569
'Activation of the superoxide (O2(-))-generating NADPH oxidase of phagocytes is the consequence of the assembly of a membrane-associated flavocytochrome b(559) with the cytosolic proteins p47(phox) and p67(phox) and the small GTPase Rac (1 or 2). We proposed that Rac1 serves as a membrane-targeting molecule for p67(phox). This hypothesis was tested ... More
A novel function for Cyclin A2: control of cell invasion via RhoA signaling.
Authors:Arsic N, Bendris N, Peter M, Begon-Pescia C, Rebouissou C, Gadéa G, Bouquier N, Bibeau F, Lemmers B, Blanchard JM,
Journal:J Cell Biol
PubMed ID:22232705
'Cyclin A2 plays a key role in cell cycle regulation. It is essential in embryonic cells and in the hematopoietic lineage yet dispensable in fibroblasts. In this paper, we demonstrate that Cyclin A2-depleted cells display a cortical distribution of actin filaments and increased migration. These defects are rescued by restoration ... More
Low affinity interactions of GDPbetaS and ribose- or phosphoryl-substituted GTP analogues with the heterotrimeric G protein, transducin.
'We have examined the effects of three commonly used classes of guanine nucleotide analogues on the retinal G protein, transducin (Gt), and found them to be quite different from those that might be expected from results with other GTP-binding proteins. The most surprising results were with guanosine 5''-O-(2-thiodiphosphate) (GDPbetaS); rather ... More
Alanine scan mutagenesis of the switch I domain of the Caulobacter crescentus CgtA protein reveals critical amino acids required for in vivo function.
Authors:Lin B, Skidmore JM, Bhatt A, Pfeffer SM, Pawloski L, Maddock JR
Journal:Mol Microbiol
PubMed ID:11251813
'The Caulobacter crescentus CgtA protein is a member of the Obg/GTP1 subfamily of monomeric GTP-binding proteins. In vitro, CgtA displays moderate affinity for both GDP and GTP and displays rapid exchange rate constants for either nucleotide, indicating that the guanine nucleotide-binding and exchange properties of CgtA are different from those ... More