1
|
Wang L, Lu D, Wang Y, Xu X, Zhong P, Yang Z. Binding selectivity-dependent molecular mechanism of inhibitors towards CDK2 and CDK6 investigated by multiple short molecular dynamics and free energy landscapes. J Enzyme Inhib Med Chem 2023; 38:84-99. [DOI: 10.1080/14756366.2022.2135511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Lifei Wang
- School of Science, Shandong Jiaotong University, Jinan, PR China
| | - Dan Lu
- Department of Physics, Jiangxi Agricultural University, Nanchang, PR China
| | - Yan Wang
- School of Science, Shandong Jiaotong University, Jinan, PR China
| | - Xiaoyan Xu
- School of Science, Shandong Jiaotong University, Jinan, PR China
| | - Peihua Zhong
- College of Computer Information and Engineering, Jiangxi Agriculture University, Nanchang, PR China
| | - Zhiyong Yang
- Department of Physics, Jiangxi Agricultural University, Nanchang, PR China
| |
Collapse
|
2
|
Hu G, Zhou HX. Binding free energy decomposition and multiple unbinding paths of buried ligands in a PreQ1 riboswitch. PLoS Comput Biol 2021; 17:e1009603. [PMID: 34767553 PMCID: PMC8612554 DOI: 10.1371/journal.pcbi.1009603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 11/24/2021] [Accepted: 10/31/2021] [Indexed: 11/18/2022] Open
Abstract
Riboswitches are naturally occurring RNA elements that control bacterial gene expression by binding to specific small molecules. They serve as important models for RNA-small molecule recognition and have also become a novel class of targets for developing antibiotics. Here, we carried out conventional and enhanced-sampling molecular dynamics (MD) simulations, totaling 153.5 μs, to characterize the determinants of binding free energies and unbinding paths for the cognate and synthetic ligands of a PreQ1 riboswitch. Binding free energy analysis showed that two triplets of nucleotides, U6-C15-A29 and G5-G11-C16, contribute the most to the binding of the cognate ligands, by hydrogen bonding and by base stacking, respectively. Mg2+ ions are essential in stabilizing the binding pocket. For the synthetic ligands, the hydrogen-bonding contributions of the U6-C15-A29 triplet are significantly compromised, and the bound state resembles the apo state in several respects, including the disengagement of the C15-A14-A13 and A32-G33 base stacks. The bulkier synthetic ligands lead to significantly loosening of the binding pocket, including extrusion of the C15 nucleobase and a widening of the C15-C30 groove. Enhanced-sampling simulations further revealed that the cognate and synthetic ligands unbind in almost opposite directions. Our work offers new insight for designing riboswitch ligands. Riboswitches are bacterial RNA elements that change structures upon binding a cognate ligand. They are of great interest not only for understanding gene regulation but also as targets for designing small-molecule antibiotics and chemical tools. Understanding the molecular determinants for ligand affinity and selectivity is thus crucial for designing synthetic ligands. Here we carried out extensive molecular dynamics simulations of a PreQ1 riboswitch bound to either cognate or synthetic ligands. By comparing and contrasting these two groups of ligands, we learn how the chemical (e.g., number of hydrogen bond donors and acceptors) and physical (e.g., molecular size) features of ligands affect binding affinity and ligand exit paths. While the number of hydrogen bond donors and acceptors is a key determinant for RNA binding affinity, the ligand size affects the rigidity of the binding pocket and thereby regulates the unbinding of the ligand. These lessons provide guidance for designing riboswitch ligands.
Collapse
Affiliation(s)
- Guodong Hu
- Shandong Key Laboratory of Biophysics, Dezhou University, Dezhou, China
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Huan-Xiang Zhou
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Physics, University of Illinois at Chicago, Chicago, Illinois, United States of America
- * E-mail:
| |
Collapse
|
3
|
Chen J, Zhang S, Wang W, Sun H, Zhang Q, Liu X. Binding of Inhibitors to BACE1 Affected by pH-Dependent Protonation: An Exploration from Multiple Replica Gaussian Accelerated Molecular Dynamics and MM-GBSA Calculations. ACS Chem Neurosci 2021; 12:2591-2607. [PMID: 34185514 DOI: 10.1021/acschemneuro.0c00813] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
To date, inhibiting the activity of β-amyloid cleaving enzyme 1 (BACE1) has been considered an efficient approach for treating Alzheimer's disease (AD). In the current work, multiple replica Gaussian accelerated molecular dynamics (MR-GaMD) simulations and the molecular mechanics general Born surface area (MM-GBSA) method were combined to investigate the effect of pH-dependent protonation on the binding of the inhibitors CS9, C6U, and 6WE to BACE1. Dynamic analyses based on the MR-GaMD trajectory show that pH-dependent protonation strongly affects the structural flexibility, correlated motions, and dynamic behavior of inhibitor-bound BACE1. According to the constructed free energy profiles, in the protonated state at low pH, inhibitor-bound BACE1 tends to populate at more conformations than in high pH. The binding free energies calculated by MM-GBSA suggest that inhibitors possess stronger binding abilities under the protonation conditions at high pH than under the protonation conditions at low pH. Moreover, pH-dependent protonation exerts a significant effect on the hydrogen bonding interactions of CS9, C6U, and 6WE to BACE1, which correspondingly alters the binding abilities of the three inhibitors to BACE1. Furthermore, in different protonated environments, three inhibitors share common interaction clusters and similar binding sites in BACE1, which are reliably used as efficient targets for the design of potent inhibitors of BACE1.
Collapse
Affiliation(s)
- Jianzhong Chen
- School of Science, Shandong Jiaotong University, Jinan 250357, China
| | - Shaolong Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Wei Wang
- School of Science, Shandong Jiaotong University, Jinan 250357, China
| | - Haibo Sun
- School of Science, Shandong Jiaotong University, Jinan 250357, China
| | - Qinggang Zhang
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Xinguo Liu
- School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| |
Collapse
|
4
|
Zhao J, Sun H, Wang W, Zhang L, Chen J. Theoretical insights into mutation-mediated conformational changes of the GNP-bound H-RAS. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.138042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
5
|
Chen J, Wang W, Sun H, Pang L, Yin B. Mutation-mediated influences on binding of anaplastic lymphoma kinase to crizotinib decoded by multiple replica Gaussian accelerated molecular dynamics. J Comput Aided Mol Des 2020; 34:1289-1305. [DOI: 10.1007/s10822-020-00355-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 10/14/2020] [Indexed: 12/19/2022]
|
6
|
Chen J, Yin B, Wang W, Sun H. Effects of Disulfide Bonds on Binding of Inhibitors to β-Amyloid Cleaving Enzyme 1 Decoded by Multiple Replica Accelerated Molecular Dynamics Simulations. ACS Chem Neurosci 2020; 11:1811-1826. [PMID: 32459964 DOI: 10.1021/acschemneuro.0c00234] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The β-amyloid cleaving enzyme 1 (BACE1) has been thought to be an efficient target for treatment of Alzheimer's disease (AD). Deep insight into inhibitor-BACE1 binding mechanism is of significance for design of potent drugs toward BACE1. In this work, multiple replica accelerated molecular dynamics (MR-aMD) simulations, principal component (PC) analysis, and free energy landscapes were integrated to decode the effect of disulfide bonds (SSBs) in BACE1 on bindings of three inhibitors 3KO, 3KT, and 779 to BACE1. The results from cross-correlation analysis suggest that the breaking of SSBs exerts significant influence on structural flexibility and internal dynamics of inhibitor-bound BACE1. PC analysis and free energy landscapes reveal that the breaking of SSBs not only evidently induces the conformational rearrangement of BACE1 but also highly changes binding poses of three inhibitors in BACE1 and leads to more disordered binding of three inhibitors to BACE1, which is further supported by the increase in binding entropy of inhibitors to BACE1 due to the breaking of SSBs. Residue-based free energy decomposition method was utilized to evaluate contributions of separate residues to inhibitor-BACE1 binding. The results suggest that although the breaking of SSBs in BACE1 does not destroy the interaction network of inhibitors with BACE1 it changes interaction strength of some residues with inhibitors. Meanwhile, the information from residue-based free energy decomposition indicates that residues L91, S96, V130, Y132, Q134, W137, F169, I171, and I179 can be used as efficient targets of drug design toward BACE1.
Collapse
Affiliation(s)
- Jianzhong Chen
- School of Science, Shandong Jiaotong University, Jinan 250357, China
| | - Baohua Yin
- School of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan 250355, China
| | - Wei Wang
- School of Science, Shandong Jiaotong University, Jinan 250357, China
| | - Haibo Sun
- School of Science, Shandong Jiaotong University, Jinan 250357, China
| |
Collapse
|
7
|
Chen J, Liu X, Zhang S, Chen J, Sun H, Zhang L, Zhang Q. Molecular mechanism with regard to the binding selectivity of inhibitors toward FABP5 and FABP7 explored by multiple short molecular dynamics simulations and free energy analyses. Phys Chem Chem Phys 2020; 22:2262-2275. [DOI: 10.1039/c9cp05704h] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Recently, fatty acid binding proteins 5 and 7 (FABP5 and FABP7) have been regarded as the prospective targets for clinically treating multiple diseases related to FABPs.
Collapse
Affiliation(s)
- Jianzhong Chen
- School of Science
- Shandong Jiaotong University
- Jinan 250357
- People's Republic of China
| | - Xinguo Liu
- School of Physics and Electronics
- Shandong Normal University
- Jinan
- People's Republic of China
| | - Shaolong Zhang
- School of Physics and Electronics
- Shandong Normal University
- Jinan
- People's Republic of China
| | - Junxiao Chen
- School of Chemistry and Pharmaceutical Engineering
- Qilu University of Technology
- Jinan
- People's Republic of China
| | - Haibo Sun
- School of Science
- Shandong Jiaotong University
- Jinan 250357
- People's Republic of China
| | - Lin Zhang
- School of Construction Machinery
- Shandong Jiaotong University
- Jinan 250357
- People's Republic of China
| | - Qinggang Zhang
- School of Physics and Electronics
- Shandong Normal University
- Jinan
- People's Republic of China
| |
Collapse
|
8
|
Shi S, Sui K, Liu W, Lei Y, Zhang S, Zhang Q. Revealing binding selectivity of ligands toward murine double minute 2 and murine double minute X based on molecular dynamics simulations and binding free energy calculations. J Biomol Struct Dyn 2019; 38:5081-5094. [PMID: 31755361 DOI: 10.1080/07391102.2019.1695671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
It is well known that the interactions of p53 with murine double minute 2 and murine double minute X, namely MDM2 and MDMX, have been significant targets of efficient anti-cancer drug design. In this study, molecular dynamics (MD) simulations, principal component (PC) analysis and binding free energy calculations are combined to recognize binding selectivity of three ligands to MDM2 and MDMX. The binding free energies were estimated by using molecular mechanics generalized Born surface area (MM-GBSA) method and the obtained results display that the increase in the binding enthalpy of three ligands to MDM2 relative to MDMX mainly drives the binding selectivity of them toward MDM2 and MDMX. The information obtained from PC analysis shows that the associations of ligands exert important impacts on internal dynamics of MDM2 and MDMX. Meanwhile, the calculations of residue-based free energy decomposition not only identify the hot interaction spots of ligands with MDM2 and MDMX, but also show the residues (L54, M53), (Y67, Y66), (V93, V92), (H96, P95), (I99, I98) and (Y100, Y99) in (MDM2, MDMX) are responsible for most contributions to the binding selectivity of three ligands toward MDM2 and MDMX. It is believed that this work can provide useful information for design of highly selective and dual inhibitors targeting MDM2 and MDMX.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Shuhua Shi
- School of Science, Shandong Jianzhu University, Jinan, China
| | - Kai Sui
- School of Science, Shandong Jianzhu University, Jinan, China
| | - Weizhe Liu
- School of Science, Shandong Jianzhu University, Jinan, China
| | - Yanzi Lei
- School of Science, Shandong Jianzhu University, Jinan, China
| | - Shaolong Zhang
- College of Physics and Electronics, Shandong Normal University, Jinan, China
| | - Qinggang Zhang
- College of Physics and Electronics, Shandong Normal University, Jinan, China
| |
Collapse
|
9
|
Tian S, Zeng J, Liu X, Chen J, Zhang JZH, Zhu T. Understanding the selectivity of inhibitors toward PI4KIIIα and PI4KIIIβ based molecular modeling. Phys Chem Chem Phys 2019; 21:22103-22112. [DOI: 10.1039/c9cp03598b] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Molecular dynamics simulations and binding free energy calculations are combined to investigate the selectivity of inhibitors toward type III phosphatidylinositol 4 kinases.
Collapse
Affiliation(s)
- Shuaizhen Tian
- Shanghai Engineering Research Center of Molecular Therapeutics & New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Jinzhe Zeng
- Shanghai Engineering Research Center of Molecular Therapeutics & New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Xiao Liu
- School of Mathematics, Physics and Statistics
- Shanghai University of Engineering Science
- Shanghai 201620
- China
| | - Jianzhong Chen
- School of Science
- Shandong Jiaotong University
- Jinan 250357
- China
| | - John Z. H. Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics & New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| | - Tong Zhu
- Shanghai Engineering Research Center of Molecular Therapeutics & New Drug Development
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai
- China
| |
Collapse
|