Prikl Biokhim Mikrobiol. 2007 May-Jun;43(3):376-81.

[Role of transamination in the mobilization of respiratory substrates in germinating seeds of castor oil plants].

[Article in Russian]

Popov VN, Eprintsev AT, Fedorin DN, Fomenko OIu, Igamberdiev AU.

Abstract

The metabolism of 1,4-14C-succinate and 2,3-14C-succinate and the activity of succinic semialdehyde dehydrogenase (EC 1.2.1.16) were studied in germinating seeds of castor oil plants (Ricinus communis L.). Succinate metabolism involved succinate dehydrogenase and was sensitive to metabolites of the gamma-aminobutyric acid shunt. Considerable accumulation of the label in amino acids reflected the progression of transamination reactions. Succinic semialdehyde dehydrogenase was purified from the endosperm of castor oil plants. Kinetic characteristics of the enzyme were evaluated. Our study indicates that the mobilization of respiratory substrates during germination of castor oil plants is related to active transamination of ketoacids in the Krebs cycle and involves the gamma-aminobutyric acid shunt.

PMID:: 17619587; [PubMed - indexed for MEDLINE]

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[Role of transamination in the mobilization of respiratory substrates in germina...
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Prikl Biokhim Mikrobiol. 2007 May-Jun ;43(3):376-81.

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[Role of transamination in the mobilization of respiratory substrates in germinating seeds of castor oil plants].

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