PI(4,5)P2: signaling the plasma membrane

Author:

Wills Rachel C.1,Hammond Gerald R. V.1ORCID

Affiliation:

1. Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, U.S.A.

Abstract

In the almost 70 years since the first hints of its existence, the phosphoinositide, phosphatidyl-D-myo-inositol 4,5-bisphosphate has been found to be central in the biological regulation of plasma membrane (PM) function. Here, we provide an overview of the signaling, transport and structural roles the lipid plays at the cell surface in animal cells. These include being substrate for second messenger generation, direct modulation of receptors, control of membrane traffic, regulation of ion channels and transporters, and modulation of the cytoskeleton and cell polarity. We conclude by re-evaluating PI(4,5)P2’s designation as a signaling molecule, instead proposing a cofactor role, enabling PM-selective function for many proteins.

Publisher

Portland Press Ltd.

Subject

Cell Biology,Molecular Biology,Biochemistry

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