Sequence of the URA1 gene encoding dihydroorotate dehydrogenase from the basidiomycete fungus Agrocybe aegerita.

The URA1 gene encoding dihydroorotate dehydrogenase (DHOdehase) from the edible basidiomycete, Agrocybe aegerita, has been cloned by complementation of the Escherichia coli pyrD mutation. The nucleotide sequence of a 1531-bp genomic fragment carrying URA1 revealed two uninterrupted open reading frames (ORFs) separated by 61 bp. The larger ORF can encode a 328-amino acid (aa) DHOdehase that has 53% homology with the corresponding protein from E. coli. Comparison with other DHOdehase aa sequences showed essentially conservation of the cofactor-binding site of flavoproteins.