Gene for a cyclophilin-type peptidyl-prolyl cis-trans isomerase from a halophilic archaeum, Halobacterium cutirubrum
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Updated: Oct 6, 2026

Overexpression and Purification of Human Cis-prenyltransferase in Escherichia coli
Published on: August 3, 2017
T Iida1, M Furutani, T Iwabuchi
1Marine Biotechnology Institute, Kamaishi Laboratories, Iwate, Japan. tiida@kamaishi.mbio.co.jp
Abstract:
A gene encoding a cyclophilin (CyP)-type peptidyl prolyl cis-trans isomerase (PPIase) was cloned from a halophilic archaeum, Halobacterium cutirubrum DSM 669, and sequenced. Although amino-acid residues common to CyPs were conserved, an insertion that showed no homology to other CyPs was found in its N-terminal region. Sequence analysis revealed that the amino-acid sequence of this CyP was 40-45% identical to those of eukaryotes and Bacillus subtilis with high cyclosporin A sensitivity, but 27% identical to those of cyclosporin A-insensitive PPIases of Escherichia coli. The gene was also expressed in E. coli. The activity of purified recombinant CyP-type PPIase was stimulated by the addition of KCl, and was suppressed by cyclosporin A.
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