Journal
CRITICAL REVIEWS IN BIOCHEMISTRY AND MOLECULAR BIOLOGY
Volume 42, Issue 1, Pages 15-39Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10409230601162752
Keywords
phosphatidylinositol 4,5-bisphosphate (PI4,5P(2)); PIP kinase structure; phosphoinositide signaling; lipid messengers
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Funding
- NCI NIH HHS [CA104708] Funding Source: Medline
- NIGMS NIH HHS [GM051968, GM057549, T32 GM08688] Funding Source: Medline
- NATIONAL CANCER INSTITUTE [R01CA104708] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM051968, T32GM008688] Funding Source: NIH RePORTER
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The phosphatidylinositol phosphate (PIP) kinases arc a unique family of enzymes that generate an assortment of lipid messengers, including the pivotal second messenger phosphatidylinositol 4,5-bisphosphate (PI4,5P(2))While members of the PIP kinase family function by catalyzing a similar phosphorylation reaction, the specificity loop of each PIP kinase subfamily determines substrate preference and partially influences distinct subcellular targeting. Specific protein-protein interactions that are unique to particular isoforms or splice variants play a key role in targeting PIP kinases to appropriate subcellular compartments to facilitate the localized generation of PI4,5P(2) proximal to effectors, a mechanism key for the function of PI4,5P(2) as a second messenger. This review documents the discovery of the PIP kinases and their signaling products, and summarizes our current understanding of the mechanisms underlying the localized generation of PI4,5P(2) by PIP kinases for the regulation of cellular events including actin cytoskeleton dynamics, vesicular trafficking, cell migration, and an assortment of nuclear events.
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