Molecular Cloning and Nucleotide Sequence of thegroELGene from the AlkaliphilicBacillussp. Strain C-125 and Reactivation of Thermally Inactivatedα-Glucosidase by Recombinant GroEL | Zendy

Yi Xu | Zendy; Tetsuo Kobayashi | Zendy; Toshiaki Kudo | Zendy

Open Access

Molecular Cloning and Nucleotide Sequence of thegroELGene from the AlkaliphilicBacillussp. Strain C-125 and Reactivation of Thermally Inactivatedα-Glucosidase by Recombinant GroEL

Author(s) -

Yi Xu,

Tetsuo Kobayashi,

Toshiaki Kudo

Publication year - 1996

Publication title -

bioscience biotechnology and biochemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.509

H-Index - 116

eISSN - 1347-6947

pISSN - 0916-8451

DOI - 10.1271/bbb.60.1633

Subject(s) - groel , groes , escherichia coli , nucleic acid sequence , bacillus subtilis , biology , strain (injury) , biochemistry , microbiology and biotechnology , gene , peptide sequence , recombinant dna , genetics , bacteria , anatomy

The groEL gene of the alkaliphilic Bacillus sp. strain C-125 was cloned in Escherichia coli and sequenced. The groEL gene encoded a polypeptide of 544 amino acids and was preceded by the incomplete groES gene, lacking its 5'-end. The sequence of the derived amino acids was 87.5% identical to that of B. subtilis, 85.4% identical to that of B. stearothemophilus, and 60.9% identical to that of E. coli. The GroEL protein was expressed in E. coli. Purified GroEL protected yeast alpha-glucosidase from irreversible aggregation at a high temperature and the addition of Mg-ATP was essential for reactivation of the alpha-glucosidase. The addition of E. coli GroES increased recovery of the enzyme activity, indicating that C-125 GroEL could function in coordination with E. coli GroES.

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