Malaysian Abstracting and Indexing SystemAnalysis of Candida albicans MET3 Promoter for the Expression of a C. albicans Gene Abdul Munir Abdul Muradauthor Farah Diba Abu Bakarauthor Brown, J.P.authorThe strength of Candida albicans MET3 promoter to regulate the expression of a gene in C. albicans was investigated in this study. A gene encoded for a transcriptional repressor for filamentous growth, NRG1, was cloned downstream of the MET3 promoter in C. albicans integrative vector, pCaEXP to produce a pMET3p-NRG plasmid. The plasmid was linearised with Stu1 and transformed into C. albicans CAI4. Polymerase chain reaction (PCR) and Southern blotting confirmed that the overexpression cassette integrated correctly into C. albicans genome at the RP10 locus. Northern blot analysis showed that the level of NRG1 overexpression in the mutant increased by only 0.5 fold compared to the wild type and to the control mutant, C. albicans CAI4 harboring an integrated pCaEXP. This data correlates with the inability of the mutant to sustain itself in yeast morphological forms, which should take place if the NRG1 gene is highly expressed, when cells were grown in filamentous inducing medium. Hence we conclude that even though it is tightly regulated, C. albicans MET3 promoter is not a strong promoter for gene overexpression in C. albicans.Q Science, Computer ScienceR Medicine, Dentistry, Pharmacy, Nursing2005Malaysian Society for Biochemistry and Molecular BiologyJournal

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