Cloning and expression of squalene epoxidase from the pathogenic yeast Candida albicans

Gene
B Favre, N S Ryder

Abstract

The allylamine antimycotic terbinafine prevents the formation of sterols by specifically inhibiting squalene epoxidase (SE). The biological and biochemical action of terbinafine on fungal pathogens has been well investigated, but little is known at the molecular level. Here we report the cloning, sequencing and expression of the target of terbinafine from the major pathogen Candida albicans. A C. albicans genomic DNA library was constructed in gamma ZAP Express and screened with a DNA fragment obtained by polymerase chain reaction with two primers designed from sequences common to Saccharomyces cerevisiae and rodent SEs. Two types of clone, approximately 3.9 kbp and 4.1 kbp, were isolated. Both contained an identical open reading frame of 1488 nucleotides, while a few sequence differences were found in the flanking regions, suggesting an allelic heterogeneity. The deduced protein sequence of C. albicans SE, 496 amino acids (55324 Da), is 54% and 41% identical to those of S. cerevisiae and rat, respectively. A 1.8-kb transcript was observed on Northern blots of C. albicans mRNA. Polyclonal antibodies, raised against an internal peptide of C. albicans SE, recognized a protein associated with the particulate fraction of M(r) 55000...Continue Reading

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Citations

Feb 24, 2009·Applied Microbiology and Biotechnology·Wenliang ZhangQi Jin
Sep 19, 2003·International Journal of Antimicrobial Agents·Manuela Schuetzer-MuehlbauerKarl Kuchler
Feb 3, 2005·Medical Mycology·Bertrand FavreNeil S Ryder
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Jan 17, 2021·Journal of Fungi·Alia A Sagatova
Feb 2, 2021·Phytochemistry·Avinash PandrekaHirekodathakallu V Thulasiram

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