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J. Biol. Chem., Vol. 277, Issue 25, 22974-22979, June 21, 2002
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From the Phospholipase D (PLD) proteins have been
identified in secretory and endocytic vesicles, consistent with their
proposed role in regulating membrane traffic. However, their sites of
catalytic action remain obscure. We have developed here a novel,
analytical approach to monitor PLD activation in intact cells employing
lifetime imaging microscopy to measure fluorescence resonance
energy transfer between protein and membrane phospholipid. Verification
and application of this technique demonstrates a dispersed endosomal,
epidermal growth factor-induced activation of the PLD1b isoform.
Application of this approach will facilitate the spatial resolution of
many protein-phospholipid interactions that are key events in the
regulation of cellular processes.
Detecting Protein-Phospholipid Interactions
EPIDERMAL GROWTH FACTOR-INDUCED ACTIVATION OF PHOSPHOLIPASE D1b
IN SITU*
§¶,
¶, and
**
Protein Phosphorylation Laboratory and
Cell Biophysics Laboratory, Cancer Research United
Kingdom London Research Institute, Lincoln's Inn Fields Laboratories,
44 Lincoln's Inn Fields, London WC2A 3PX, United Kingdom
*
The costs of publication of this
article were defrayed in part by the
payment of page charges. The article
must therefore be hereby marked
"advertisement" in
accordance with 18 U.S.C. Section
1734 solely to indicate this fact.
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