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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Purification and molecular cloning of succinyltransferase of the rat alpha-ketoglutarate dehydrogenase complex. Absence of a sequence motif of the putative E3 and/or E1 binding site.

Full-length cDNA clones for succinyltransferase of the rat alpha-ketoglutarate dehydrogenase complex were isolated from rat heart cDNA libraries in lambda gt11. The cDNA clones were identified as those for rat succinyltransferase by the identity of their predicted amino acid sequence with the NH2-terminal amino acid sequence of rat succinyltransferase determined by protein chemical analysis and the known amino acid sequence of bovine succinyltransferase. The clone with the longest cDNA consisted of 2747 base pairs and coded for a leader peptide of 56 amino acid residues and a mature protein of 386 amino acid residues. The primary structure of rat succinyltransferase showed close similarity to Escherichia coli and Azotobacter vinelandii succinyltransferases, in the COOH-terminal part forming the lipoyl-binding domain and the NH2-terminal part forming the inner core-catalytic domain. However, the rat succinyltransferase did not contain a sequence motif that has been found as an E3- and/or E1-binding site in the dihydrolipoamide acyltransferases of three alpha-ketoacid dehydrogenase complexes (Hummel, K. B., Litwer, S., Bradford, A. P., Aitken, A., Danner, D. J., and Yeaman, S. J. (1988) J. Biol. Chem. 263, 6165-6168, Reed, L. J., and Hackert, M. L. (1990) J. Biol. Chem. 265, 8971-8974). The absence of this sequence was confirmed by direct sequencing of the polymerase chain reaction product of rat heart mRNA and by computer analysis. These results show that the rat succinyltransferase does not have the sequence motif of the putative E3- and/or E1-binding site.[1]

References

  1. Purification and molecular cloning of succinyltransferase of the rat alpha-ketoglutarate dehydrogenase complex. Absence of a sequence motif of the putative E3 and/or E1 binding site. Nakano, K., Matuda, S., Yamanaka, T., Tsubouchi, H., Nakagawa, S., Titani, K., Ohta, S., Miyata, T. J. Biol. Chem. (1991) [Pubmed]
 
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