4M4X

Structure and Dimerization Properties of the Aryl Hydrocarbon Receptor (AHR) PAS-A Domain

4M4X の概要

• エントリーDOI: 10.2210/pdb4m4x/pdb
• 分子名称: Aryl hydrocarbon receptor (2 entities in total)
• 機能のキーワード: ahr, pas-a, dimer, interface, transcription factor, arnt, transcription
• 由来する生物種: Mus musculus (mouse)
• 細胞内の位置: Cytoplasm : P30561
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 42259.25

構造登録者

Wu, D.,Potluri, N.,Kim, Y.,Rastinejad, F. (登録日: 2013-08-07, 公開日: 2013-09-18, 最終更新日: 2024-02-28)

主引用文献

Wu, D.,Potluri, N.,Kim, Y.,Rastinejad, F.
Structure and dimerization properties of the aryl hydrocarbon receptor PAS-A domain.
Mol.Cell.Biol., 33:4346-4356, 2013

PubMed Abstract: The aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor that binds to xenobiotics and responds by regulating the expression of gene programs required for detoxification and metabolism. AHR and its heterodimerization partner aryl hydrocarbon receptor nuclear translocator (ARNT) belong to the basic helix-loop-helix (bHLH)-PER-ARNT-SIM (PAS) family of transcription factors. Here we report the 2.55-Å-resolution crystal structure of the mouse AHR PAS-A domain, which represents the first AHR-derived protein structure. The AHR PAS-A domain forms a helix-swapped homodimer in the crystal and also in solution. Through a detailed mutational analysis of all interface residues, we identified several hydrophobic residues that are important for AHR dimerization and function. Our crystallographic visualization of AHR PAS-A dimerization leads us to propose a mode of heterodimerization with ARNT that is supported by both biochemical and cell-based data. Our studies also highlight the residues of other mammalian bHLH-PAS proteins that are likely involved in their homo- or heterodimerization.

PubMed: 24001774
DOI: 10.1128/MCB.00698-13

実験手法

X-RAY DIFFRACTION (2.551 Å)