作者: Masoud Yadollahi-Farsani , Panagiotis Kefalas , Barbara A. Saxty , John MacDermot
DOI: 10.1046/J.1432-1327.1999.00368.X
关键词:
摘要: Full length cDNA encoding ADP-ribosyltransferase-1 (ART1) was generated from human skeletal muscle. A single base variation the published sequence observed (C770-->T), and established as a polymorphism by screening of population 50 Caucasians. The predicted nonconservative substitution Leu for Pro at codon 257. Cell lines with stable doxycycline-inducible expression two polymorphic forms ART1 were Chinese hamster V79 cells, exploited in studies to compare activities ART1-Pro257 ART1-Leu257. results revealed no differences capacity phosphoinositide-specific phospholipase C cleave isoforms plasma membrane. Furthermore, capacities ART1-Leu257 ADP-ribosylate agmatine or fibroblast growth factor-2 similar. Differences catalytic however, identified when measurements made their membrane-associated proteins on surface cells. Protein(s) molecular mass 80-110 kDa more extensively ADP-ribosylated than ART1-Leu257, accordance Vmax (59.5 +/- 5.5 37.0 3.0) Km values (12.5 4.5 5.0 1. 9) respectively.