Sequences of two adjacent genes, one (DAL2) encoding allantoicase and another (DCG1) sensitive to nitrogen-catabolite repression in Saccharomyces cerevisiae.

Reported are the nucleotide sequences of the yeast allantoicase-encoding gene (DAL2) and that of an unknown gene adjacent to it. Expression of the unidentified gene is sensitive to nitrogen catabolite repression (NCR) and regulated by the DAL80 product, a previously documented control element regulating allantoin pathway gene expression. Both genes possess multiple upstream activation sequences (UAS) homologous to the UASNTR element shown to be required for sensitivity to NCR. Also present upstream from DAL2 is a mutant form of the upstream induction sequence required for response of DAL7 to induction. Its occurrence in mutant form is consistent with the poor induction of DAL2 expression observed in vivo.