Histidine-phosphorylation of succinyl CoA synthetase from Trypanosoma brucei.

作者: Isabel Hunger-Glaser , Markus Linder , Thomas Seebeck

DOI: 10.1016/S0166-6851(99)00025-0

关键词: Trypanosoma bruceiSuccinyl coenzyme A synthetaseBiologyNucleotideNucleoside-diphosphate kinaseEnzymeCitric acid cyclePhosphorylationBiochemistryHistidine

摘要: The insect form of Trypanosoma brucei depends on respiration for its energy requirements. It contains a fully functional mitochondrion with complete citric acid cycle. Most enyzmes have been characterized to date. current study presents the characterization histidine phosphorylation activity one few remaining enzymes, succinyl CoA synthetase. trypanosomal enyzme was identified by partial purification, followed direct protein sequencing. is rapidly phosphorylated, presumably through auto-phosphorylation, using either ATP or GTP as phosphate donors. occurs exclusively residues. histidine-bound can be donated suitable acceptors in rapid reaction. This phosphotransfer reaction highly nucleotide selective, only ADP, but none other nucleoside-diphosphates tested, used acceptor.

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