A Point Mutation in the 14α-Sterol Demethylase Gene cyp51A Contributes to Itraconazole Resistance in Aspergillus fumigatus-Reference-Cited by-同舟云学术

A Point Mutation in the 14α-Sterol Demethylase Gene cyp51A Contributes to Itraconazole Resistance in Aspergillus fumigatus

Published:2003-03 Issue:3 Volume:47 Page:1120-1124
ISSN:0066-4804
Container-title:Antimicrobial Agents and Chemotherapy
language:en
Short-container-title:Antimicrob Agents Chemother

Author:

Diaz-Guerra T. M.¹,Mellado E.¹,Cuenca-Estrella M.¹,Rodriguez-Tudela J. L.¹

Affiliation:

1. Unidad de Micología, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain

Abstract

ABSTRACT The genes encoding 14α-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.

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Pharmacology (medical),Pharmacology

Link

https://journals.asm.org/doi/pdf/10.1128/AAC.47.3.1120-1124.2003

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