Characterization of the Cyclophilin of Trichophyton mentagrophytes
Abstract
A genetic approach to cyclophilins in a dermatophyte, Trichophyton mentagrophytes, was carried out. The nucleotide and deduced amino acid sequences of the cyclophilin of T. mentagrophytes shared about 70% sequence similarity with those of Schizosaccharomyces pombe, Saccharomyces cerevisiae and Candida albicans. However, the first 21 amino acid and the C-terminal amino acid regions of 188 to 226 of the T. mentagrophytes cyclophilin were distinct from those of the other fungal cyclophilins. The recombinant glutathione 5-transferase (GST)-T. mentagrophytes cyclophilin fusion protein produced by Escherichia coli was purified. The protease digest of the fusion protein had a molecular weight of about 13 kDa and peptidyl-prolyl cis-trans isomerase (PPI) activity. This digest protein from T. mentagrophytes was confirmed to be cyclophilin by proving PPI activity.
Abbreviations
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- cDNA
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- complementary DNA
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- CsA
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- cyclosporin A
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- DNA
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- deoxyribonucleic acid
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- DTM
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- dermatophyte test medium
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- EDTA
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- ethylenediamine-N, N, N′, N′-tetra acetic acid disodium salt dihydrate
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- GST
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- glutathione 5-transferase
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- IPTG
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- isopropyl β-D-thiogalactoside
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- PCR
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- polymerase chain reaction
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- PPI
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- peptidyl-prolyl cis-trans isomerase
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- SDS
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- sodium dodecyl sulfate
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- TE buffer
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- 10 mM Tris-HCl, pH 8.0 and 1 mM EDTA