J. Doussiere et al., A phenylarsine oxide-binding protein of neutrophil cytosol, which belongs to the S100 family, potentiates NADPH oxidase activation, BIOC BIOP R, 285(5), 2001, pp. 1317-1320
Citations number
14
Categorie Soggetti
Biochemistry & Biophysics
Journal title
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
By photoaffinity labeling with a tritiated azido derivative of phenylarsine
oxide (PAO), 4[N-(4-azido-2-nitrophenyl)amino-[H-3]acetamido]phenylarsine
oxide ([H-3]azidoPAO), we demonstrate that PAO binds selectively to the S10
0 A8/A9 complex of bovine neutrophil cytosol (previously known as p7/p23, h
omologous to the MRP-8/MRP-14 complex of human phagocytes). Using a semirec
ombinant cell free assay of oxidase activation and the determination of oxi
dase activity by the production of the superoxide anion O-2(-), we found th
at the PAO binding protein (p7/p23) was able to potentiate the activation o
f NADH oxidase and that this effect was synergized by PAO. The p7/p23 prote
in complex of bovine neutrophils can therefore be considered as a positive
regulator of NADPH oxidase activation in neutrophils. (C) 2001 Academic Pre
ss.