Abstract:
:A 60- to 70-fold purification of an NAD+ glycohydrolase from the inner membrane of rat liver mitochondria to apparent homogeneity on sodium dodecyl sulfate (SDS)-polyacrylamide slab gel is described. The minimum molecular weight of the enzyme on polyacrylamide gels in the presence of SDS is around 62,000. The enzyme splits NAD+ to ADP-ribose and, presumably, nicotinamide. No phosphatase or phosphodiesterase activity is detected in the purified enzyme preparation. The enzyme shows high activity with NAD+ and moderate activity with NADP+ as substrates NAD(P)Hs are poor substrates. ATP and nicotinamide inhibit the enzyme. A possible participation of the enzyme in the mechanism of calcium release from rat liver mitochondria is discussed.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Moser B,Winterhalter KH,Richter Cdoi
10.1016/0003-9861(83)90220-5subject
Has Abstractpub_date
1983-07-01 00:00:00pages
358-64issue
1eissn
0003-9861issn
1096-0384pii
0003-9861(83)90220-5journal_volume
224pub_type
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