They concluded that cyanobacteria lacked the ability to make one enzyme, called 2-oxoglutarate dehydrogenase, and that this missing enzyme rendered the bacteria unable to produce a compound -- called succinyl-coenzyme A -- for the next step in the TCA cycle.
That is, rather than making 2-oxoglutarate dehydrogenase, these bacteria produce both 2-oxoglutarate decarboxylase and succinic semialdehyde dehydrogenase.
2] because 2-oxoglutarate dehydrogenase complex (2-ODHc) is inhibited by arsenite, giving a incubation 7/incubation 8 ratio of ~2 (Table 1).
3] Nonstandard abbreviations: MEGS, mitochondrial energy-generating system; PDHc, pyruvate dehydrogenase complex; TCA, tricarboxylic acid; OXPHOS, oxidative phosphorylation; RC, respiratory chain; ANT, adenine nucleotide translocator; mtDNA, mitochondrial DNA; CCCP, carbonyl cyanide 3-chlorophenyl hydrazone; CS, citrate synthase; SDH, succinate dehydrogenase; CrP, phosphocreatine; 2-ODHc, 2-oxoglutarate dehydrogenase complex; and SCC, succinate cytochrome c oxidoreductase (complex II + III).
As shown in Table 2, diabetes caused increases in the activities of glucose-o-phosphate dehydrogenase (17%) carnitine acetyltransferase (21%), 2-oxoglutarate dehydrogenase (37%), and fatty acid synthetase (62%), but we found no significant changes in citrate synthase activity (Table 2).
Cooperation of Ca and pH in regulation of the activity of the 2-oxoglutarate dehydrogenase complex and its components from bovine kidney cortex.