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The specialization of the two ornithine carbamoyltransferases of Pseudomonas

par Ramos, Fernando;Stalon, Victor ;Pierard, André ;Wiame, Jean-Marie
Référence B B A - Enzymology, 139, 1, page (98-106)
Publication Publié, 1967-05

Article révisé par les pairs

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Résumé :

The two ornithine carbamoyltransferases (carbamoylphosphate:l-ornithine carbamoyltransferase, EC 2.1.3.3) of Pseudomonas are integrated into different metabolic sequences. This integration appears both in their regulation and in their activities. In Pseudomonas IRC 204, the catabolic ornithine carbamoyltransferase is subject to catabolite repression in the same way as arginine deiminase (l-arginine iminohydrolase, EC 3.5.3.6) and carbamate kinase (ATP: carbamate phosphotransferase, EC 2.7.2.2). The catabolic ornithine carbamoyltransferase in vivo, has little or no biosynthetic function. The anabolic ornithine carbamoyltransferase, unlike other similar enzymes, is unable to perform the catabolic phosphorolysis. © 1967.