Regulation of PLCbeta isoforms by Rac.
Small GTPases function as molecular switches, which transduce cellular signals from upstream regulators to downstream effectors in a guanine nucleotide-dependent manner. Direct binding partners of small GTPases fall into four classes of both regulators and effectors that can be differentiated on the basis of the state of nucleotide required for binding. Here we describe a procedure for the rapid screening and quantitative assessment of direct interactions of the Rho family of small GTPases with effector molecules of the phospholipase Cbeta class of enzymes using surface plasmon resonance technology. The experimental format described is also readily adaptable toward characterizing guanine nucleotide-dependent binding events of both small and heterotrimeric G proteins with various classes of GTPase regulatory proteins.
Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, USA.
Jason T
JT
Snyder
Mark R
MR
Jezyk
Svetlana
S
Gershburg
T Kendall
TK
Harden
John
J
Sondek
D000818:Animals; D006801:Humans; D007527:Isoenzymes / Q000378:metabolism*; D054799:Phospholipase C beta; D018411:Spodoptera; D020349:Surface Plasmon Resonance / Q000379:methods; D010738:Type C Phospholipases / Q000378:metabolism*; D020744:rac GTP-Binding Proteins / Q000502:physiology*
D007527:Isoenzymes; D010738:Type C Phospholipases; D054799:Phospholipase C beta; D020744:rac GTP-Binding Proteins