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lüll Stimulation of phospholipase Cbeta by membrane interactions, interdomain movement, and G protein binding--how many ways can you activate an enzyme?Drin G; Scarlata SCell Signal 2007[Jul]; 19 (7): 1383-92Signaling proteins are usually composed of one or more conserved structural domains. These domains are usually regulatory in nature by binding to specific activators or effectors, or species that regulate cellular location, etc. Inositol-specific mammalian phospholipase C (PLC) enzymes are multidomain proteins whose activities are controlled by regulators, such as G proteins, as well as membrane interactions. One of these domains has been found to bind membranes, regulators, and activate the catalytic region. The recently solved structure of a major region of PLC-beta2 together with the structure of PLC-delta1 and a wealth of biochemical studies poises the system towards an understanding of the mechanism through which their regulations occurs.|Amino Acid Sequence[MESH]|Animals[MESH]|Cell Membrane/*metabolism[MESH]|Enzyme Activation[MESH]|GTP-Binding Proteins/*metabolism[MESH]|Humans[MESH]|Isoenzymes/chemistry/*metabolism[MESH]|Molecular Sequence Data[MESH]|Phospholipase C beta[MESH]|Phospholipase C delta[MESH]|Protein Binding[MESH]|Protein Structure, Tertiary[MESH]|Type C Phospholipases/chemistry/*metabolism[MESH] |