Malate Synthase and β-Methylmalyl Coenzyme A Lyase Reactions in the Methylaspartate Cycle in Haloarcula hispanica
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چکیده
منابع مشابه
Succinyl-CoA:Mesaconate CoA-Transferase and Mesaconyl-CoA Hydratase, Enzymes of the Methylaspartate Cycle in Haloarcula hispanica
Growth on acetate or other acetyl-CoA-generating substrates as a sole source of carbon requires an anaplerotic pathway for the conversion of acetyl-CoA into cellular building blocks. Haloarchaea (class Halobacteria) possess two different anaplerotic pathways, the classical glyoxylate cycle and the novel methylaspartate cycle. The methylaspartate cycle was discovered in Haloarcula spp. and opera...
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The observed equilibrium constants (Kobs) of the malate dehydrogenase (EC 1.1.1.37), citrate synthase (EC 4.1.3.7) and citrate lyase (EC 4.1.3.6) reactions have been determined under near physiological conditions (38”, pH 7.0, Z = 0.25, free [Mg”+] = 10u3 M). From these values the observed standard free energy change (AGibs) for the hydrolysis of acetyl-CoA has been determined. Under the above ...
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Biosynthesis of proteinogenic amino acids in the extremely halophilic archaeon Haloarcula hispanica was explored by using biosynthetically directed fractional 13C labeling with a mixture of 90% unlabeled and 10% uniformly 13C-labeled glycerol. The resulting 13C-labeling patterns in the amino acids were analyzed by two-dimensional 13C,1H correlation spectroscopy. The experimental data provided e...
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The use of multiple replication origins in archaea is not well understood. In particular, little is known about their specific control mechanisms. Here, we investigated the active replication origins in the three replicons of a halophilic archaeon, Haloarcula hispanica, by extensive gene deletion, DNA mutation and genome-wide marker frequency analyses. We revealed that individual origins are sp...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 2017
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.00657-16