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Integrative Modeling of PROTAC-Mediated Ternary Complexes.

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  • 1Innovation Institute for Artificial Intelligence in Medicine of Zhejiang University, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, Zhejiang, China.

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PROTAC-Model is a new computational method for predicting protein complex structures. This tool aids in the rational design of Proteolysis-targeting chimeras (PROTACs) for drug discovery.

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Area of Science:

  • Computational chemistry
  • Structural biology
  • Drug discovery

Background:

  • Proteolysis-targeting chimeras (PROTACs) are an emerging technology for targeted protein degradation.
  • Designing effective PROTACs is challenging due to limited structural data of ternary complexes.

Purpose of the Study:

  • To develop an integrative computational method, PROTAC-Model, for predicting Target-PROTAC-E3 ternary complex structures.
  • To evaluate the performance of PROTAC-Model compared to existing methods.

Main Methods:

  • PROTAC-Model combines FRODOCK for initial complex generation and RosettaDock for refinement.
  • The method was tested on 14 cases and model quality was assessed using CAPRI criteria.

Main Results:

  • The FRODOCK-based protocol achieved medium or high quality for 8 out of 14 cases using unbound structures.
  • Refinement with RosettaDock improved the quality, with 12 out of 14 cases achieving medium or high quality.
  • PROTAC-Model demonstrated superior performance compared to PRosettaC and Drummond et al.'s method.

Conclusions:

  • PROTAC-Model is an effective computational tool for predicting PROTAC-mediated ternary complex structures.
  • The method can aid in the rational design of novel PROTACs for therapeutic applications.