Nitric oxide stimulates auto-ADP-ribosylation of glyceraldehyde-3-phosphate dehydrogenase

Research output: Contribution to journalArticlepeer-review

Abstract

Nitric oxide generation in brain cytosolic fractions markedly enhances ADP-ribosylation of a single 37-kDa protein. By utilizing a biotinylated NAD and avidin affinity chromatography, we purified this protein. Partial amino acid sequencing establishes its identity as glyceraldehyde-3-phosphate dehydrogenase (GAPDH). This is further confirmed by detection of GAPDH enzymatic activity in the purified 37-kDa protein. GAPDH is ADP-ribosylated in the absence of brain extract. This auto-ADP-ribosylation is enhanced by nitric oxide generation. ADP-ribosylation appears to involve the cysteine where NAD interacts with GAPDH so that ADP-ribosylation likely inhibits enzymatic activity. Such inhibition may play a role in nitric oxide-mediated neurotoxicity.

Original languageEnglish (US)
Pages (from-to)9382-9385
Number of pages4
JournalProceedings of the National Academy of Sciences of the United States of America
Volume89
Issue number20
DOIs
StatePublished - Oct 15 1992

Keywords

  • Biotinylated NAD
  • Glutamate neurotoxicity
  • Nitroarginine
  • cGMP

ASJC Scopus subject areas

  • General

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