alexa Restricted expression and photic induction of a novel mouse regulatory factor X4 transcript in the suprachiasmatic nucleus.
Molecular Biology

Molecular Biology

Journal of Cytology & Histology

Author(s): Araki R, Takahashi H, Fukumura R, Sun F, Umeda N,

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Abstract The regulatory factor X (RFX) family of transcription factors is characterized by a unique and highly conserved 76-amino acid residue DNA-binding domain. Mammals have five RFX genes, but the physiological functions of their products are unknown, with the exception of RFX5. Here a mouse RFX4 transcript was identified that encodes a peptide of 735 amino acids, including the DNA-binding domain. Its expression was localized in the suprachiasmatic nucleus, the central pacemaker site of the circadian clock. Also, light exposure was found to induce its gene expression in a subjective night-specific manner. Polyclonal antibodies were prepared, and an 80-kDa band was detected in the suprachiasmatic nucleus by Western hybridization. A histochemical study showed a localization of the products in the nucleus. This is the first report on mouse RFX4, which contains the RFX DNA-binding motif. Our investigation may provide clues to the physiological function of RFX4. This article was published in J Biol Chem and referenced in Journal of Cytology & Histology

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