Enzyme inactivation by peroxyacetyl nitrate
Journal Article
·
· Arch. Biochem. Biophys.; (United States)
Isocitric dehydrogenase (NADP linked), G-6-P dehydrogenase, and malic dehydrogenase were inactivated by peroxyacetyl nitrate. The enzymes could be protected in some cases; isocitric dehydrogenase by isocitrate and NAPD, the former being more effective, and G-6-P dehydrogenase by NADP but not by G-6-P. Malic dehydrogenase was not significantly protected either by substrate or coenzyme. Inhibition of these three enzymes by cadmium ion or p-chloromercuribenzoate was prevented in the same order by the presence of substrate or coenzyme. The conclusion that peroxyacetyl nitrate inactivated the enzymes by oxidizing sulfhydryl groups was further supported by the resistance of ribonuclease, containing no sulfhydryl groups, to peroxyacetyl nitrate. 17 references, 6 figures.
- Research Organization:
- Univ. of California, Riverside
- OSTI ID:
- 5929422
- Journal Information:
- Arch. Biochem. Biophys.; (United States), Journal Name: Arch. Biochem. Biophys.; (United States) Vol. 102:1; ISSN ABBIA
- Country of Publication:
- United States
- Language:
- English
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560301* -- Chemicals Metabolism & Toxicology-- Cells-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL EFFECTS
CHEMICAL REACTIONS
DATA
ENZYME ACTIVITY
ESTERS
EXPERIMENTAL DATA
INFORMATION
INHIBITION
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PEROXYACETYL NITRATE
POLLUTION
RADICALS
SULFHYDRYL RADICALS
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIR POLLUTION
BIOLOGICAL EFFECTS
CHEMICAL REACTIONS
DATA
ENZYME ACTIVITY
ESTERS
EXPERIMENTAL DATA
INFORMATION
INHIBITION
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PEROXYACETYL NITRATE
POLLUTION
RADICALS
SULFHYDRYL RADICALS