Cloning and functional analysis of the orotidine-5′-phosphate decarboxylase gene (PbrURA3) of the pathogenic fungusParacoccidioides brasiliensis

A genomic clone encoding the Paracoccidioides brasiliensis orotidine monophosphate decarboxylase gene (PbrUPA3) was isolated by screening a subgenomic plasmid DNA library of this fungus, using a PCR amplification product of the gene as a probe. Sequence analysis revealed that the gene contains an open reading frame of 855 bp with a single intron (162 bp), and encodes a putative 285 amino acids polypeptide of estimated molecular weight 31.1 kDa and isoelectric point 6.5. The deduced amino acid sequence predicted a 73.4% identity with oroddine monophosphate decarboxylase of Aspergillus nidulans. Functionality of the gene was demonstrated by transformation into a Saccharomyces cerevisiae ura3 null mutant. The PbrURA3 gene sequence has been submitted to GenBank database under Accession No. AJ133782. Copyright (c) 2005 John Wiley & Sons, Ltd.