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Titolo:
FORMATION OF N-ARYLACYLHYDROXAMIC ACIDS FROM NITROSO AROMATIC-COMPOUNDS IN ISOLATED SPINACH LEAF-CELLS
Autore:
YOSHIOKA T; UEMATSU T;
Indirizzi:
HOKKAIDO INST PHARMACEUT SCI,DEPT HYG CHEM OTARU HOKKAIDO 04702 JAPAN HOKKAIDO INST PHARMACEUT SCI,DEPT HYG CHEM OTARU HOKKAIDO 04702 JAPAN
Titolo Testata:
Journal of agricultural and food chemistry
fascicolo: 2, volume: 46, anno: 1998,
pagine: 606 - 610
SICI:
0021-8561(1998)46:2<606:FONAFN>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
PYRUVATE-DEHYDROGENASE COMPLEX; ARYLACETOHYDROXAMIC ACIDS; GENERAL-PRINCIPLES; ETHER HERBICIDES; PLANTS; ARYLACETAMIDES; CHLOROPLASTS; MITOCHONDRIA; SPERMATOZOA; MEMBRANE;
Keywords:
N-ARYLACYLHYDROXAMIC ACID; NITROSO AROMATIC COMPOUND; PDHC; SPINACH LEAF CELLS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
33
Recensione:
Indirizzi per estratti:
Citazione:
T. Yoshioka e T. Uematsu, "FORMATION OF N-ARYLACYLHYDROXAMIC ACIDS FROM NITROSO AROMATIC-COMPOUNDS IN ISOLATED SPINACH LEAF-CELLS", Journal of agricultural and food chemistry, 46(2), 1998, pp. 606-610

Abstract

The formation of N-arylacetohydroxamic acids from nitroso aromatic compounds in the presence of pyruvate tvas investigated using isolated spinach leaf cells. The activity was enhanced by the addition of TPP, MgSO4, and pyruvate, requirements for pyruvate dehydrogenase complex (PDHC). Measurement of the kinetic parameters revealed that the K-m values of nitroso aromatic compounds tested were identical and that electron-donating ring substituents decreased the catalytic efficiency. The activation energy of the formation of N-phenylacetohydroxamic acid waslower than that reported for porcine heart PDHC. With alpha-oxo acidstested, alpha-oxobutyrate served as a substrate to give the corresponding N-phenylpropionylhydroxamic acid. The activity of spinach leaf cells in N-phenylacetohydroxamic acid formation was found in both mitochondria and chloroplasts. The contribution of chloroplast PDHC to totalactivity in the formation of N-phenylacetohydroxamic acid was estimated to be 50% under the conditions used.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 22:22:28