Thermostable Farnesyl Diphosphate Synthase of Bacillus stearothermophilus: Molecular Cloning, Sequence Determination, Overproduction, and Purification

The structural gene for thermostable farnesyl diphosphate synthase from Bacillus stearothermophilus was cloned, sequenced, and overexpressed in Escherichia coli cells. A 1,260-nucleotide sequence of the cloned fragment was determined. This sequence specifies an open reading frame of 891 nucleotides...

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Published inJournal of biochemistry (Tokyo) Vol. 113; no. 3; pp. 355 - 263
Main Authors Koyama, Tanetoshi, Obata, Shusei, Osabe, Masami, Takeshita, Ayumi, Yokoyama, Ken, Uchida, Masatoshi, ishino, Tokuzo, Ogura, TKyozo
Format Journal Article
LanguageEnglish
Published Oxford Oxford University Press 1993
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Summary:The structural gene for thermostable farnesyl diphosphate synthase from Bacillus stearothermophilus was cloned, sequenced, and overexpressed in Escherichia coli cells. A 1,260-nucleotide sequence of the cloned fragment was determined. This sequence specifies an open reading frame of 891 nucleotides for farnesyl diphosphate synthase. The deduced amino acid sequence shows a 42% similarity with that of E. coli FPP synthase [Fujisaki et al. (1990) J. Biochem. 108, 995-1000]. Comparison with prenyltransferases from a wide range of organisms, from bacteria to human, revealed the presence of seven highly conserved regions. In contrast to thermolabile prenyltransferases, which have four to six cysteine residues, the thermostable farnesyl diphosphate synthase carries only two cysteine residues. This enzyme is also unique in that some of the amino acids that are fully conserved in equivalents from other sources are replaced by functionally different amino acids. Construction of an overproducing strain provided a sufficient supply of this enzyme and it was purified to homogeneity. The purified recombinant enzyme is immunochemically identical with the native B. stearothermophilus enzyme, and it is not inactivated even after treatment at 65°C for 70 min.
Bibliography:1This work was supported in part by Grants-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan and the Special Coordination Funds of the Science and Technology Agency of Japan. The nucleotide sequence data reported in this paper will appear in the DDBJ, EMBL, and GenBank Nucleotide Sequence Databases with the accession number D13293.
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2To whom correspondence should be addressed.
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ISSN:0021-924X
1756-2651
DOI:10.1093/oxfordjournals.jbchem.a124051