Transcriptional changes in the nuc-2A mutant strain of Neurospora crassa cultivated under conditions of phosphate shortage.
The molecular mechanism that controls the response to phosphate shortage in Neurospora crassa involves four regulatory genes -nuc-2, preg, pgov, and nuc-1. Phosphate shortage is sensed by the nuc-2 gene, the product of which inhibits the functioning of the PREG-PGOV complex. This allows the translocation of the transcriptional factor NUC-1 into the nucleus, which activates the transcription of phosphate-repressible phosphatases. The nuc-2A mutant strain of N. crassa carries a loss-of-function mutation in the nuc-2 gene, which encodes an ankyrin-like repeat protein. In this study, we identified transcripts that are downregulated in the nuc-2A mutant strain. Functional grouping of these expressed sequence tags allowed the identification of genes that play essential roles in different cellular processes such as transport, transcriptional regulation, signal transduction, metabolism, protein synthesis, protein fate, and development. These results reveal novel aspects of the phosphorus-sensing network in N. crassa.
Gras
Diana E
DE
Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, 14049-900 Ribeirão Preto, SP, Brazil.
Silveira
Henrique C S
HC
Peres
Nalu T A
NT
Sanches
Pablo R
PR
Martinez-Rossi
Nilce M
NM
Rossi
Antonio
A
D046508:Culture Techniques; D005656:Fungal Proteins / Q000235:genetics* / Q000378:metabolism; D015966:Gene Expression Regulation, Fungal; D008969:Molecular Sequence Data; D009154:Mutation; D009492:Neurospora crassa / Q000235:genetics / Q000378:metabolism*; D010710:Phosphates / Q000378:metabolism*; D014158:Transcription, Genetic
D005656:Fungal Proteins; D010710:Phosphates