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Mitogen-Activated Protein Kinase Cascade Required for Regulation of Development and Secondary Metabolism in Neurospora crassa
A key protein signaling pathway needed for growth and chemical production in Neurospora crassa
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Abstract
Growth of basal hyphae is significantly reduced in mik-1, mek-1, and mak-1 deletion mutants.
- Deletion of mik-1, mek-1, and mak-1 resulted in short aerial hyphae and reduced formation of asexual macroconidia.
- The three mutants produced abundant arthroconidia, which are usually rare in normal conditions.
- Mutants were unable to form protoperithecia or perithecia in sexual reproduction contexts.
- Phosphorylation of the MAK-1 MAPK was absent in mik-1 and mek-1 mutants, indicating their role in the same signaling pathway.
- Under nitrogen starvation, increased levels of mRNA and protein for tyrosinase were observed in the mutants, suggesting a link to sexual differentiation.
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