Mechanisms of phospholipase C-regulated calcium entry.
In a variety of cell types, activation of phospholipase C-linked receptors results in the generation of intracellular Ca2+ signals comprised of components of both intracellular Ca2+ release, and enhanced entry of Ca2+ across the plasma membrane. This entry of Ca2+ occurs by either of two general mechanisms: the release of stored Ca2+ can activate, by an unknown mechanism, store-operated channels in the plasma membrane, a process known as capacitative calcium entry. Alternatively, second messengers generated at the plasma membrane can activate Ca2+ channels more directly, a non-capacitative calcium entry process. This review summarizes current knowledge of the underlying signaling mechanisms and the nature of the channel molecules responsible for these two general categories of regulated Ca2+ entry.
Bird
Gary S
GS
Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, P.O. Box 12233, Research Triangle Park, North Carolina 27709, USA.
Aziz
Omar
O
Lievremont
Jean-Philippe
JP
Wedel
Barbara J
BJ
Trebak
Mohamed
M
Vazquez
Guillermo
G
Putney
James W
JW
D002118:Calcium / Q000378:metabolism*; D015220:Calcium Channels / Q000378:metabolism; D017136:Ion Transport; D010738:Type C Phospholipases / Q000378:metabolism*
D015220:Calcium Channels; D010738:Type C Phospholipases; D002118:Calcium