Structural modeling of the AhR:ARNT complex in the bHLH-PASA-PASB region elucidates the key determinants of dimerization.
Structural modeling of the AhR:ARNT complex in the bHLH-PASA-PASB region elucidates the key determinants of dimerization.
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BHLH-PASA-PASB区域中AHR:ARNT复合物的结构建模阐明了二聚化的关键决定因素。
DOI:
10.1039/c7mb00005g
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发表时间:
2017-05-02
影响因子:
--
通讯作者:
Bonati L
中科院分区:
文献类型:
--
作者:
Corrada D;Denison MS;Bonati L
Elucidation of the dimerization process of the Aryl hydrocarbon Receptor (AhR) with the AhR Nuclear Translocator (ARNT) is crucial for understanding the mechanisms underlying the AhR functional activity, including mediation of the toxicity of environmental contaminants. In this work, for the first time a structural model of the AhR:ARNT dimer encompassing the entire bHLH-PASA-PASB domain region is proposed. It is developed by using a template based modeling approach, relying on the recently available crystallographic structures of two dimers of homologous systems in the bHLH-PAS family of proteins: the CLOCK:BMAL1 and the HIF-2α:ARNT heterodimers. The structural and energetic characteristics of the modeled AhR:ARNT protein-protein interface are determined by evaluating the variations in solvent accessible surface area, the total binding free energy and the per-residue free energy contributions obtained by the MM-GBSA method and the Energy Decomposition Analysis. The analyses of the intricate network of inter-domain interactions at the dimerization interfaces provide insights into the key determinants of dimerization. These are confirmed by comparison of the computational findings with the available experimental mutagenesis and functional analysis data. The results here presented on the AhR:ARNT dimer structure and interactions provide a framework to start analyzing the mechanism of AhR transformation into its functional DNA binding form.
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DOI:
10.1093/toxsci/kfn149
发表时间:
2008-11
期刊:
Toxicological sciences : an official journal of the Society of Toxicology
影响因子:
--
作者:
Bunger MK;Glover E;Moran SM;Walisser JA;Lahvis GP;Hsu EL;Bradfield CA
通讯作者:
Bradfield CA
影响因子:
5.7
作者:
Anderson, CAF;Palmer, AG;Rost, B
通讯作者:
Rost, B
影响因子:
4.6
作者:
Bonati, Laura;Corrada, Dario;Motta, Stefano
通讯作者:
Motta, Stefano
影响因子:
--
作者:
Fraccalvieri, Domenico;Tiberti, Matteo;Papaleo, Elena
通讯作者:
Papaleo, Elena
DOI:
10.1126/science.1222804
发表时间:
2012-07-13
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Huang N;Chelliah Y;Shan Y;Taylor CA;Yoo SH;Partch C;Green CB;Zhang H;Takahashi JS
通讯作者:
Takahashi JS