THERMOSTABLE FARNESYL DIPHOSPHATE SYNTHASE OF BACILLUS-STEAROTHERMOPHILUS - MOLECULAR-CLONING, SEQUENCE DETERMINATION, OVERPRODUCTION, AND PURIFICATION

被引:121
作者
KOYAMA, T
OBATA, S
OSABE, M
TAKESHITA, A
YOKOYAMA, K
UCHIDA, M
NISHINO, T
OGURA, K
机构
[1] TOYOTA MOTOR CO LTD,DIV R&D PLANNING,TOYOTA,AICHI 471,JAPAN
[2] TOHOKU UNIV,FAC ENGN,DEPT BIOCHEM & ENGN,SENDAI,MIYAGI 980,JAPAN
关键词
D O I
10.1093/oxfordjournals.jbchem.a124051
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
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-degrees-C for 70 min.
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页码:355 / 363
页数:9
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