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Journal of Clinical Microbiology, April 2000, p. 1352-1358, Vol. 38, No. 4
Research Center for Pathogenic Fungi and
Microbial Toxicoses, Chiba University, Chuo-ku, Chiba 260-8673, Japan
Received 7 September 1999/Returned for modification 11 November
1999/Accepted 3 January 2000
Nucleotide sequences of 426 bp from the mitochondrial (mt)
cytochrome b genes of six anamorph species and two species
of Neosartorya teleomophs of Aspergillus
section Fumigati were determined. These sequences were used
to build nucleotide- and amino acid-based trees for phylogenetic
analysis. Thirteen strains of A. fumigatus including 10 clinical isolates of A. fumigatus, 1 type culture of
A. fumigatus var. fumigatus, 1 type culture of
A. fumigatus var. ellipticus, and 1 strain of
A. fumigatus var. albus, had the same
nucleotide sequences. One strain of A. fumisynnematus, two
strains labeled A. neoellipticus, two strains of A. viridinutans, and one strain of A. duricaulis had
distinct nucleotide and amino acid sequences. Two strains of A. brevipes were divided into two types. One produced a 1,500-bp
fragment that included an intron. The nucleotide sequences of its two
exons were similar to those of the A. fumigatus, and the
derived amino acid sequence was the same as that for A. fumigatus. The other produced a 426-bp fragment and had the same
nucleotide and amino acid sequences as A. unilateralis. Neosartorya fischeri var. fischeri and N. stramenia had nucleotide sequences that differed from that of
A. fumigatus. These species possessed their own
characteristic nucleotide sequences that differed from each other. In
comparisons of homologous sequences from four other pathogenic species
of Aspergillus, regions specific to section Fumigati were found. The mt cytochrome b gene
analysis was valuable for the identification, classification, and
phylogenetic analysis of isolates of section Fumigati.
0095-1137/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Mitochondrial Cytochrome b Gene Analysis
of Aspergillus fumigatus and Related Species
*
Corresponding author. Mailing address: Research Center
for Pathogenic Fungi and Microbial Toxicoses, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8673, Japan. Phone: 81-43-222-7171, ext.
5917. Fax: 81-43-226-2486. E-mail:
yoko{at}myco.pf.chiba-u.ac.jp.
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