Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9278888 | FEMS Yeast Research | 2005 | 9 Pages |
Abstract
In the yeast Hansenula polymorpha (Pichia angusta) nitrate assimilation is tightly regulated and subject to a dual control: nitrogen metabolite repression (NMR), triggered by reduced nitrogen compounds, and induction, elicited by nitrate itself. In a previous paper [Serrani, F., Rossi, B. and Berardi, E (2001) Nitrogen metabolite repression in Hansenula polymorpha: the nmrl-l mutation. Curr. Genet. 40, 243-250], we identified five loci (NMR1-NMR5) involved in NMR, and characterised one of them (NMR1), which likely identifies a regulatory factor. Here, we describe two more mutants, namely nmr2-1 and nmr4-1. The first one possibly identifies a regulatory factor involved in nitrogen metabolite repression by various nitrogen sources alternative to ammonium. The second one, apparently involved in ammonium assimilation, probably has sensor functions.
Related Topics
Life Sciences
Immunology and Microbiology
Applied Microbiology and Biotechnology
Authors
Beatrice Rossi, Sonia Manasse, Federica Serrani, Enrico Berardi,