Journal
CURRENT OPINION IN MICROBIOLOGY
Volume 13, Issue 4, Pages 431-436Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.mib.2010.04.008
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Funding
- National Institute of Health [1R01 AI065728-01]
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Filamentous fungi produce a vast array of small molecules called secondary metabolites, which include toxins as well as antibiotics. Coregulated gene clusters are the hallmark of fungal secondary metabolism, and there is a growing body of evidence that suggests regulation is at least, in part. epigenetic. Chromatin-level control is involved in several silencing phenomena observed in fungi including mating type switching, telomere position effect (TPE), silencing of ribosomal DNA, regulation of genes involved in nutrient acquisition, and as presented here, secondary metabolite cluster expression. These phenomena are tied together by the underlying theme of chromosomal location, often near centromeres and telomeres, where facultative heterochromatin plays a role in transcription Secondary metabolite gene clusters are often located subtelomerically and recently it has been shown that proteins involved in chromatin remodeling, such as LaeA, ClrD, CcIA, and HepA mediate cluster regulation.
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