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2015 ; 21
(ä): 27-32
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Tafazzins from Drosophila and mammalian cells assemble in large protein complexes
with a short half-life
#MMPMID25598000
Xu Y
; Malhotra A
; Claypool SM
; Ren M
; Schlame M
Mitochondrion
2015[Mar]; 21
(ä): 27-32
PMID25598000
show ga
Tafazzin is a transacylase that affects cardiolipin fatty acid composition and
mitochondrial function. Mutations in human tafazzin cause Barth syndrome yet the
enzyme has mostly been characterized in yeast. To study tafazzin in higher
organisms, we isolated mitochondria from Drosophila and mammalian cell cultures.
Our data indicate that tafazzin binds to multiple protein complexes in these
organisms, and that the interactions of tafazzin lack strong specificity. Very
large tafazzin complexes could only be detected in the presence of cardiolipin,
but smaller complexes remained intact even upon treatment with phospholipase A2.
In mammalian cells, tafazzin had a half-life of only 3-6h, which was much shorter
than the half-life of other mitochondrial proteins. The data suggest that
tafazzin is a transient resident of multiple protein complexes.