Colony development, which includes hyphal extension, branching, anastomosis, and asexual sporulation, is a fundamental aspect of the life cycle of filamentous fungi; genetic mechanisms underlying these phenomena are poorly understood. We conducted transcriptional profiling during colony development of the model filamentous fungus Neurospora crassa, using 70-mer oligonucleotide microarrays. Rela...

The correlation between protein synthesis and the nuclear division cycle in Neurospora crassa hyphae was studied by inhibiting protein accumulation by two different experimental procedures: (1) starvation for lysine in a lysine-requiring mutant (lys-1); and (2) addition of cycloheximide. Lysine starvation in a lys-1 strain of N. crassa quickly blocked the nuclear division cycle and nuclei accum...

Nutrient-dependent variations in transcript levels of the filamentous fungus Neurospora crassa were studied on a microarray containing some 4700 cDNAs. Cells were grown in minimal and acetate medium. The isolated RNA was analyzed in comparison to the results obtained upon the hybridization of samples prepared from the RNA of cells grown in full medium. Altogether, 160 cDNA clones exhibited sign...

Telomerase RNA (TER) is an essential component of the telomerase ribonucleoprotein complex. The mechanism for TER 3'-end processing is highly divergent among different organisms. Here we report a unique spliceosome-mediated TER 3'-end cleavage mechanism in Neurospora crassa that is distinct from that found specifically in the fission yeast Schizosaccharomyces pombe. While the S. pombe TER intro...

In the fungus Neurospora crassa, hexagonal crystalline inclusions have been observed with both the light and electron microscopes. These crystals have been enriched by differential centrifugation and found to be identical with ergosterol by the criteria of ultraviolet spectral analysis and cytochemical analysis. Observations have been made on the distribution and fine structure of the crystalli...

The soluble form of adenylate cyclase was extracted and purified from wild-type Neurospora crassa mycelia. Brain or N. crassa calmodulin significantly enhanced this enzyme activity in assay mixtures containing Mg2+-ATP as substrate. EGTA reverses this calmodulin activation.

The growth of mycelial fungi is characterized by the highly polarized extension of hyphal tips and the formation of subapical branches, which themselves extend as new tips. In Neurospora crassa, tip growth and branching are crucial elements for this saprophyte in the colonization and utilization of organic substrates. Much research has focused on the mechanism of tip extension, but a cellular m...