Journal
EUKARYOTIC CELL
Volume 9, Issue 10, Pages 1549-1556Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/EC.00154-10
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Funding
- Miller Institute for Basic Research in Science
- American Cancer Society [RSG-08-030-01-CCG]
- NIH [GM58529, NS39546, AI43288, 2P01 GM068087]
- NSF [MCB0618433]
- DFG [BR 1375-1, SFB 638]
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Light signaling pathways and circadian clocks are inextricably linked and have profound effects on behavior in most organisms. Here, we used chromatin immunoprecipitation (ChIP) sequencing to uncover direct targets of the Neurospora crassa circadian regulator White Collar Complex (WCC). The WCC is a blue-light receptor and the key transcription factor of the circadian oscillator. It controls a transcriptional network that regulates similar to 20% of all genes, generating daily rhythms and responses to light. We found that in response to light, WCC binds to hundreds of genomic regions, including the promoters of previously identified clock-and light-regulated genes. We show that WCC directly controls the expression of 24 transcription factor genes, including the clock-controlled adv-1 gene, which controls a circadian output pathway required for daily rhythms in development. Our findings provide links between the key circadian activator and effectors in downstream regulatory pathways.
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