Insight into the Interaction Mechanism of Human SGLT2 with Its Inhibitors: 3D-QSAR Studies, Homology Modeling, and Molecular Docking and Molecular Dynamics Simulations

Overview

Journal J Mol Model

Publisher Springer

Specialty Molecular Biology

Date 2018 Mar 8

PMID 29511885

Citations 2

Authors

Lili Dong

Ruirui Feng

Jiawei Bi

Shengqiang Shen

Huizhe Lu

Jianjun Zhang

Affiliations

Soon will be listed here.

Abstract

Human sodium-dependent glucose co-transporter 2 (hSGLT2) is a crucial therapeutic target in the treatment of type 2 diabetes. In this study, both comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) were applied to generate three-dimensional quantitative structure-activity relationship (3D-QSAR) models. In the most accurate CoMFA-based and CoMSIA-based QSAR models, the cross-validated coefficients (r) were 0.646 and 0.577, respectively, while the non-cross-validated coefficients (r) were 0.997 and 0.991, respectively, indicating that both models were reliable. In addition, we constructed a homology model of hSGLT2 in the absence of a crystal structure. Molecular docking was performed to explore the bonding mode of inhibitors to the active site of hSGLT2. Molecular dynamics (MD) simulations and binding free energy calculations using MM-PBSA and MM-GBSA were carried out to further elucidate the interaction mechanism. With regards to binding affinity, we found that hydrogen-bond interactions of Asn51 and Glu75, located in the active site of hSGLT2, with compound 40 were critical. Hydrophobic and electrostatic interactions were shown to enhance activity, in agreement with the results obtained from docking and 3D-QSAR analysis. Our study results shed light on the interaction mode between inhibitors and hSGLT2 and may aid in the development of C-aryl glucoside SGLT2 inhibitors.

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