Nicotinamide nucleotide transhydrogenase

Nicotinamide nucleotide transhydrogenase, NADfPj TRANSHYDROGENASE NICOTINAMIDE PHOSPHORIBOSYLTRANS-FERASE... 

Youssef NN, Hammond D (1971) The fine structure of the developmental stages of the microsporidian Nosema apis Zander. Tissue Cell 3 283-294 Yu Y, Samuelson J (1994) Primary structure of an Entamoeba histolytica nicotinamide nucleotide transhydrogenase. Mol Biochem Parasitol 68 323-328 Zheng L, Cash VL, Hint DH, Dean DR (1998) Assembly of iron-sulfur clusters. Identification of an iscSUA-hscBA-fdx gene cluster from Azotobacter vinelandii. J Biol Chem 273 13264-13272... 

M Anderlund, TL Nissen, J Nielsen, J Villadsen, J Rydstrom, B Hahn-Hagerdal, MC Kielland-Brandt. Expression of the Escherichia coli pntA and pntB genes, encoding nicotinamide nucleotide transhydrogenase, in Saccharomyces cerevisiae and its effect on product formation during anaerobic glucose fermentation. Appl Environ Microbiol 65 2333-2340, 1999. 

The term nicotinamide nucleotide transhydrogenase (EC 1.6.1.1) is used in this chapter to denote those enzymes that catalyze the reversible... 

Nicotinamide nucleotide transhydrogenases may be divided into two classes. One class is present in certain bacteria, and possibly in some plants, is an easily extractable, water-soluble enzyme is not functionally linked to the energy-transfer system of the bacterial membrane is a fiavoprotein and is specific for the 4B-hydrogen atom of both NADH and NADPH. The other class is present in both certain bacteria and in mitochondria is a firmly membrane-bound water-insoluble enzyme is functionally linked to the energy-transfer system of the bacterial or mitochondrial membrane is not known to be a flavoprotein and is specific for the 4A-hydrogen atom of NADH and the 4B-hydrogen atom of NADPH. For the sake of convenience, the two classes of enzyme will be referred to below as BB-specific and AB-specific transhydrogenases, respectively. 

Nicotinamide nucleotide transhydrogenase was originally discovered in Pseudomonas fluorescens. Part of the work done with these bacteria by Kaplan and co-workers (see 7) appeared later to have involved Pseudomonas aeruginosa. There is little doubt, however, that these two strains contain transhydrogenases that are closely related. Kaplan and co-workers (5) also demonstrated the presence of transhydrogenase in... 

Mitochondrial nicotinamide nucleotide transhydrogenase can be estimated in the intact organelle either by removing aliquots and determining the individual oxidized and reduced nicotinamide nucleotides. (90) or by measuring changes of the intrinsic absorption (90, 37) or fluorescence... 

Comparison of methods for the purification of mitochondrial nicotinamide nucleotide transhydrogenase from beef heart... 

Nicotinamide nucleotide transhydrogenase, which catalyzes the reaction NADPH + NAD+ NADH + NADP+, spans the membrane, but its catalytic site faces the M side. 

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