Identification of Potent Chloride Intracellular Channel Protein 1 Inhibitors from Traditional Chinese Medicine through Structure-Based Virtual Screening and Molecular Dynamics Analysis

Biomed Res Int. 2017:2017:4751780. doi: 10.1155/2017/4751780. Epub 2017 Sep 25.

Abstract

Chloride intracellular channel 1 (CLIC1) is involved in the development of most aggressive human tumors, including gastric, colon, lung, liver, and glioblastoma cancers. It has become an attractive new therapeutic target for several types of cancer. In this work, we aim to identify natural products as potent CLIC1 inhibitors from Traditional Chinese Medicine (TCM) database using structure-based virtual screening and molecular dynamics (MD) simulation. First, structure-based docking was employed to screen the refined TCM database and the top 500 TCM compounds were obtained and reranked by X-Score. Then, 30 potent hits were achieved from the top 500 TCM compounds using cluster and ligand-protein interaction analysis. Finally, MD simulation was employed to validate the stability of interactions between each hit and CLIC1 protein from docking simulation, and Molecular Mechanics/Generalized Born Surface Area (MM-GBSA) analysis was used to refine the virtual hits. Six TCM compounds with top MM-GBSA scores and ideal-binding models were confirmed as the final hits. Our study provides information about the interaction between TCM compounds and CLIC1 protein, which may be helpful for further experimental investigations. In addition, the top 6 natural products structural scaffolds could serve as building blocks in designing drug-like molecules for CLIC1 inhibition.

MeSH terms

  • Chloride Channels / antagonists & inhibitors*
  • Chloride Channels / chemistry*
  • Drugs, Chinese Herbal / chemistry*
  • Drugs, Chinese Herbal / therapeutic use
  • Humans
  • Medicine, Chinese Traditional
  • Membrane Transport Modulators / chemistry*
  • Membrane Transport Modulators / therapeutic use
  • Molecular Dynamics Simulation*
  • Neoplasm Proteins / antagonists & inhibitors*
  • Neoplasm Proteins / chemistry*
  • Neoplasms / drug therapy

Substances

  • CLIC1 protein, human
  • Chloride Channels
  • Drugs, Chinese Herbal
  • Membrane Transport Modulators
  • Neoplasm Proteins