Structural mechanism underlying ligand binding and activation of PPARγ.
Structural mechanism underlying ligand binding and activation of PPARγ.
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DOI:
10.1016/j.str.2021.02.006
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发表时间:
2021-09-02
期刊:
影响因子:
--
通讯作者:
Kojetin DJ
中科院分区:
文献类型:
--
作者:
Shang J;Kojetin DJ
Ligands bind to an occluded orthosteric ligand-binding pocket within the nuclear receptor (NR) ligand-binding domain (LBD). Molecular simulations have revealed theoretical ligand entry/exit pathways to the orthosteric pocket; however, it remains unclear whether ligand binding proceeds through induced fit or conformational selection mechanisms. Here, using NMR spectroscopy, ITC, and SPR analysis, we provide evidence that structurally distinct agonists bind PPARγ via a two-step induced fit mechanism involving an initial fast kinetic step followed by a slow conformational change. The agonist encounter complex binding pose is suggested in crystal structures where ligands bind to a surface pore suggested as a ligand entry site in molecular simulations. Our findings suggest an activation mechanism for PPARγ where agonist binding occurs through an initial encounter complex followed by a transition of the ligand into the final binding pose within the orthosteric pocket inducing a transcriptionally active conformation. Shang and Kojetin use NMR and biophysical methods to study the binding mechanism of PPARγ agonist ligands. This study supports a model by which ligand binding to PPARγ occurs through an induced fit mechanism involving an initial encounter complex followed by a conformational change into the final bound state.
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影响因子:
14.8
作者:
Bruning, John B.;Parent, Alexander A.;Gil, German;Zhao, Min;Nowak, Jason;Pace, Margaret C.;Smith, Carolyn L.;Afonine, Pavel V.;Adams, Paul D.;Katzenellenbogen, John A.;Nettles, Kendall W.
通讯作者:
Nettles, Kendall W.
DOI:
10.1007/978-1-4939-9195-2_21
发表时间:
2019-01-01
期刊:
NUCLEAR RECEPTORS: METHODS AND EXPERIMENTAL PROTOCOLS
影响因子:
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作者:
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10.1107/s0907444904019158
发表时间:
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影响因子:
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通讯作者:
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