Project description:Gene expression profiling was performed to compare RNA abundances in mycelium of Puf knockout strains compared to that in mycelium of wild-type N. crassa
Project description:RATIONALE: Studying the genes expressed in samples of tissue from patients with cancer may help doctors identify biomarkers related to cancer.
PURPOSE: This laboratory study is using gene expression profiling to evaluate normal tissue and tumor tissue from patients with colon cancer that has spread to the liver, lungs, or peritoneum.
Project description:Transcriptional profiling with next-generation sequencing methods demonstrated that a Neurospora crassa mutant with the three most highly expressed beta-glucosidase genes deleted had a transcriptional response to cellobiose similair to that of wild type N. crassa exposed to cellulose.
Project description:Light represents an important environmental cue, which exerts considerable influence on the metabolism of fungi. Studies with the biotechnological fungal workhorse Trichoderma reesei (Hypocrea jecorina) have revealed an interconnection between transcriptional regulation of cellulolytic enyzmes and the light response. The filamentous fungus, Neurospora crassa, has been used as a model organism to study light and circadian rhythm biology. We therefore investigated whether light also regulates transcriptional regulation of cellulolytic enzymes in N. crassa. We show that the N. crassa photoreceptor genes wc-1, wc-2 and vvd are involved in regulation of cellulase gene expression, indicating that this phenomenon is conserved among filamentous fungi. Genome wide analysis of photoreceptor mutants and evaluation of results by analysis of mutant strains identified several candidate genes likely to play a role in light modulated cellulase gene expression.
Project description:Transcriptional profiling of Neurospora crassa ∆mak-2 strain grown under phosphate-shortage were compared the transcription profile of the control strain grown in both low- and high-Pi cultures. The filamentous fungus Neurospora crassa provides an excellent model system for the study of molecular responses to ambient signaling in eukaryotic microorganisms. Inorganic phosphate is an essential growth-limiting nutrient in nature and is crucial in genetic information. Numerous ambient signals activate the recruitment of mitogen-activated protein kinase (MAPK) cascades. Thus, in an attempt to identify genes involved in metabolic responses to exogenous phosphate sensing and in the functioning of a mitogen-activated protein kinase coding gene (mak-2) in N. crassa, we performed microarray experiments with the strain carrying the mak-2 gene knockout (Δmak-2) grown under phosphate-shortage by comparing the transcription profile to that of the control strain grown in both low- and high-phosphate cultures. Here we provide evidence that the mak-2 gene is an element of the adaptive response to extracellular Pi changes revealing novel aspects of phosphorus-sensing network in N. crassa.
Project description:Transcriptional profiling with next-generation sequencing methods demonstrated that a Neurospora crassa mutant with the three most highly expressed beta-glucosidase genes deleted had a transcriptional response to cellobiose similair to that of wild type N. crassa exposed to cellulose. N. crassa was pregrown in Sucrose and transferred to Avicel (cellulose), Cellobiose, Sucrose or media with no carbon added. Biological triplicates used to identify differentially expressed genes in WT on Avicel. Single libraries for mutant strains identify which genes show similair expression on cellobiose as in the WT on cellulose.