Reference: Hamasawa K, et al. (1987) Molecular cloning and nucleotide sequence of the 3-isopropylmalate dehydrogenase gene of Candida utilis. J Gen Microbiol 133(4):1089-97

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Abstract


A 3-isopropylmalate dehydrogenase (3-IMDH, EC 1.1.1.85) gene was cloned from a gene library of Candida utilis. One of the plasmids, pYKL30, could complement Escherichia coli leuB and Saccharomyces cerevisiae leu2 auxotrophs; a 2.2 kb HindIII fragment subcloned in pBR322 could still complement the leuB mutation. Southern hybridization confirmed that this fragment was derived from C. utilis. An open reading frame of 1089 bp that corresponded to a polypeptide of 363 amino acids, one residue shorter than the 3-IMDH of S. cerevisiae, was found in the cloned fragment. The homology between the 3-IMDHs of C. utilis and S. cerevisiae was 76.2% in nucleotides and 85.4% in amino acids. In contrast, the homology between the 3-IMDHs of C. utilis and Thermus thermophilus was much smaller and was restricted to some regions of the gene.

Reference Type
Comparative Study | Journal Article
Authors
Hamasawa K, Kobayashi Y, Harada S, Yoda K, Yamasaki M, Tamura G
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