Synthesis and Cellular Labeling of Caged Phosphatidylinositol Derivatives

Abstract: Phosphatidylinositol (PI) is the biosynthetic precursor for seven phosphoinositides, important signaling lipids in cells. A membrane‐permeant caged PI derivative featuring a photo‐removable coumarinyl group masking the negative charge of the phosphate, as well as two enzymatically removable butyrate esters for increased lipophilicity and for preventing phosphate migration, were synthesized. Rapid cell entry and cellular labeling in fixed cells was demonstrated by a photo‐cross‐linkable diazirine followed by attachment of a fluorophore through click chemistry. Using this technique, we found that the multifunctional caged PI derivative resided predominantly at internal membranes but rapidly changed to the plasma membrane after uncaging. Accordingly, a preliminary proteomic analysis of the lipid–protein conjugates revealed that the two major PI transport proteins PITPα and β were prime targets of the photo‐cross‐linked PI derivative.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Synthesis and Cellular Labeling of Caged Phosphatidylinositol Derivatives ; volume:26 ; number:2 ; year:2020 ; pages:384-389 ; extent:6
Chemistry - a European journal ; 26, Heft 2 (2020), 384-389 (gesamt 6)

Creator

DOI
10.1002/chem.201903704
URN
urn:nbn:de:101:1-2022060809452213176768
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
15.08.2025, 7:24 AM CEST

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