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Rev-ErbA beta : ウィキペディア英語版 | Rev-ErbA beta
Rev-ErbA beta (Rev-erbβ) also known as NR1D2 (nuclear receptor subfamily 1, group D, member 2) is a protein that in humans is encoded by the ''NR1D2'' gene. Rev-erbβ is a member of the Rev-ErbA family of transcription factors. Rev-erbβ, like Rev-erbα, belongs to the nuclear receptor superfamily and can modulate gene expression by directly binding to their promoters. == Structure ==
Rev-erbβ is similar to Rev-erbα in its protein structure and function as a transcriptional repressor. The crystal structure of an unliganded Rev-erbβ ligand-binding domain (LBD) has been resolved (see figure to the right) and shows an extremely small ligand-binding pocket. However, Rev-erbβ has been shown to interact with heme, which appears important for its function. The structure of Rev-erbβ complexed with heme (see figure to the left) shows a substantial movement of helices 1 (N-terminus ) and 11 (C-terminus ) which opens up a large binding pocket in the interior of the protein that is able to accommodate this ligand.〔; ; 〕
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