The Zn(II)2Cys6 putative Aspergillus nidulans transcription factor repressor of sexual development inhibits sexual development under low-carbon conditions and in submersed culture.

ABSTRACT: Here we have characterized the putative Zn(II)2Cys6 transcription factor RosA from the filamentous fungus Aspergillus nidulans. The rosA gene encodes a protein of 713 aa, which shares 38% sequence similarity to Pro1 from Sordaria macrospora. In contrast to Pro1, which promotes the transition from protoperithecia to perithecia, RosA is a negative regulator of sexual development in A. nidulans. Transcript levels of rosA were usually very low and were only transiently upregulated upon carbon starvation and at 12 hr of asexual development. Deletion of rosA only slightly induced fruiting-body formation under standard culture conditions, but enabled sexual development under low-glucose and high-osmolarity conditions and the production of Hulle cells under submersed growth conditions. Stimulation

SUBMITTER: Vienken K 

PROVIDER: S-EPMC1449130 | biostudies-literature | 2005 Feb

REPOSITORIES: biostudies-literature