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- W2045016738 abstract "The heme domain of neuronal PAS domain protein 2 (NPAS2), a transcription factor that regulates the mammalian circadian rhythm, has been suggested to act as a sensor for carbon monoxide. To characterize the role of the heme domain in this function, we investigated the effects of PASA domain mutants, in the context of full-length NPAS2, on the transcriptional activity of the mouse Period 1 gene in NIH3T3 cells. Mutation of the endogenous ligand for ferrous heme (H119A or H171A) resulted in remarkably reduced transcriptional activity. In gel-shift assays, H119A or H171A mutants of the isolated basic helix-loop-helix (bHLH)-PASA domain impaired heterodimer formation with BMAL1, resulting in loss of DNA binding to the canonical E-box (CACGTG). These results indicate that the transcriptional activities of the mutants correlated well with their DNA-binding activities, suggesting that local conformational changes near the axial ligands of the PASA domain are responsible for its regulation of transcription." @default.
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- W2045016738 date "2008-04-01" @default.
- W2045016738 modified "2023-10-18" @default.
- W2045016738 title "Effects of mutations in the heme domain on the transcriptional activity and DNA-binding activity of NPAS2" @default.
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- W2045016738 doi "https://doi.org/10.1016/j.bbrc.2008.01.053" @default.
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