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2017 ; 292
(10
): 4266-4279
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Comparative Characterization of Phosphatidic Acid Sensors and Their Localization
during Frustrated Phagocytosis
#MMPMID28115519
Kassas N
; Tanguy E
; Thahouly T
; Fouillen L
; Heintz D
; Chasserot-Golaz S
; Bader MF
; Grant NJ
; Vitale N
J Biol Chem
2017[Mar]; 292
(10
): 4266-4279
PMID28115519
show ga
Phosphatidic acid (PA) is the simplest phospholipid naturally existing in living
organisms, but it constitutes only a minor fraction of total cell lipids. PA has
attracted considerable attention because it is a phospholipid precursor, a lipid
second messenger, and a modulator of membrane shape, and it has thus been
proposed to play key cellular functions. The dynamics of PA in cells and in
subcellular compartments, however, remains an open question. The recent
generation of fluorescent probes for PA, by fusing GFP to PA-binding domains, has
provided direct evidence for PA dynamics in different intracellular compartments.
Here, three PA sensors were characterized in vitro, and their preferences for
different PA species in particular lipidic environments were compared. In
addition, the localization of PA in macrophages during frustrated phagocytosis
was examined using these PA sensors and was combined with a lipidomic analysis of
PA in intracellular compartments. The results indicate that the PA sensors
display some preferences for specific PA species, depending on the lipid
environment, and the localization study in macrophages revealed the complexity of
intracellular PA dynamics.