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J Biol Chem. 1989 Mar 25;264(9):5226-32.

The primary structure of Escherichia coli L-threonine dehydrogenase.

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  • 1Department of Biochemistry, Purdue University, West Lafayette, Indiana 47907.

Abstract

The complete primary structures of Escherichia coli L-threonine dehydrogenase has been deduced by sequencing the cloned tdh gene. The primary structure so determined agrees with results obtained independently for the amino acid composition, the N-terminal amino acid sequence (20 residues), and a short sequence at the end of an internal peptide of the purified enzyme. The presence of a predicted Asp-Pro bond at residues 148 and 149 was confirmed by treatment of purified threonine dehydrogenase with dilute acid and subsequent analysis of the resulting cleavage products. The primary structure of L-threonine dehydrogenase from E. coli has been examined for possible homology to other NAD+-dependent dehydrogenases; indications are that this enzyme is a member of the zinc-containing long-chain alcohol/polyol dehydrogenase family.

PMID:
2647748
[PubMed - indexed for MEDLINE]
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