Predicting the Conformational Variability of Abl Tyrosine Kinase using Molecular Dynamics Simulations and Markov State Models.

Predicting the Conformational Variability of Abl Tyrosine Kinase using Molecular Dynamics Simulations and Markov State Models.
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DOI:
10.1021/acs.jctc.7b01170
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发表时间:
2018-05-08
影响因子:
5.5
通讯作者:
Roux B
Roux B
中科院分区:
化学1区
文献类型:
--
作者:
Meng Y;Gao C;Clawson DK;Atwell S;Russell M;Vieth M;Roux B

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Understanding protein conformational variability remains a challenge in drug discovery. The issue arises in protein kinases, whose multiple conformational states can affect the binding of small-molecule inhibitors. To overcome this challenge, we propose a comprehensive computational framework based on Markov State Models (MSMs). Our framework integrates the information from explicit-solvent molecular dynamics simulations to accurately rank-order the accessible conformational variants of a target protein. We tested the methodology using Abl kinase with a reference and blind-test set. Only half of the Abl conformational variants discovered by our approach are present in the disclosed X-ray structures. The approach successfully identified a protein conformational state not previously observed in public structures, but evident in a retrospective analysis of Lilly in-house structures: the X-ray structure of Abl with WHI-P154. Using MSM-derived model, the free energy landscape and kinetic profile of Abl was analyzed in detail highlighting opportunities for targeting the unique metastable states.
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