Eam. Hodson et al., REGULATION OF PHOSPHOLIPASE C-DELTA BY GTP-BINDING PROTEINS-RHOA AS AN INHIBITORY MODULATOR, Biochimica et biophysica acta. Molecular cell research, 1403(1), 1998, pp. 97-101
The regulation of Phospholipase C (PLC)delta activity remains obscure.
These studies show that PLC delta(1) activity is significantly enhanc
ed by both guanosine thiotriphosphate (GTP gamma S) and Clostridium bo
tulinum exoenzyme C3 (C3) but not by aluminium fluoride. C3 ADP ribosy
lated a 21-kDa protein in the PLC delta(1) preparation and Western blo
tting identified rhoA in these samples. RhoA acts as an inhibitory mod
ulator of PLC delta activity. (C) 1998 Elsevier Science B.V. All right
s reserved.