Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 47, Issue 3, Pages 1120-1124Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.47.3.1120-1124.2003
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The genes encoding 14alpha-sterol demethylases (cyp51A and cyp51B) were analyzed in 12 itraconazole (ITC)-resistant and three ITC-susceptible clinical isolates of Aspergillus fumigatus. Six ITC-resistant strains exhibited a substitution of another amino acid for glycine at position 54, which is located at a very conserved region of the Cyp51A protein. The cyp51A gene from the A. fumigatus wild-type strain (CM-237) was replaced with the mutated cyp51A gene copy of an ITC-resistant strain (AF-72). Two transformants exhibited resistance to ITC, both of which had incorporated the mutated copy of the cyp51A gene.
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