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Microbiology. 1998 Apr;144 ( Pt 4):849-57.

Repetitive sequences (RPSs) in the chromosomes of Candida albicans are sandwiched between two novel stretches, HOK and RB2, common to each chromosome.

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  • 1Laboratory of Medical Mycology, Nagoya University School of Medicine, Japan.


A novel sequence designated HOK, which is next to the RPS, a repetitive sequence specific to Candida albicans, was cloned and sequenced. HOK hybridized with all of the chromosomes on which the RPSs were located, but did not hybridize with chromosome 3, which does not harbour any RPSs. Sequence determination revealed that a portion of HOK has significant homology with the B and C1 fragments of Ca3, which is used as a molecular epidemiological probe. A homology search of the deduced amino acids of HOK against the protein database showed partial homology with an isocitrate dehydrogenase of Saccharomyces cerevisiae, although an ORF large enough to encode the enzyme was not detected. To verify the existence of other sequences homologous with HOK, a portion of the HOK sequence was amplified using PCR. Sequence determination of the 41 clones from the PCR products resulted in at least six HOK-homologous clones. Another RPS-containing clone, RB2, was isolated from the Pstl-digested chromosome R or 1. It was determined that RB2a, one of the subclones from RB2, hybridized with all of the chromosomes, including chromosome 3, with which neither HOK nor RPS hybridized. The hybridization profile also showed that RPS is located between HOK and RB2a on chromosomes other than chromosome 3.

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