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Protein-ligand cocrystal structures: we can do better.

Charles H Reynolds1

  • 1Gfree Bio, LLC , 3805 Old Easton Road, Doylestown, Pennsylvania 18902, United States.

ACS Medicinal Chemistry Letters
|July 23, 2014
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Summary

Many protein-ligand cocrystal structures show poor ligand geometry due to refinement errors. Improved refinement models can significantly reduce these issues, leading to more accurate structural data.

Keywords:
Protein−ligand cocrystalbound ligand strainstructure refinementstructure-based designstructure-induced fit

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Area of Science:

  • Structural biology
  • Computational chemistry
  • Drug discovery

Background:

  • Protein-ligand cocrystal structures are crucial for understanding molecular interactions.
  • Poorly refined ligand geometries are frequently observed in these structures.
  • These errors compromise the accuracy of structural data and downstream analyses.

Purpose of the Study:

  • To highlight the prevalence and impact of poor ligand geometries in protein-ligand cocrystal structures.
  • To propose that improved refinement models can mitigate these geometric issues.
  • To enhance the reliability of structural data in drug discovery and structural biology.

Main Methods:

  • Review of existing literature and analysis of protein-ligand cocrystal structures.
  • Identification of common geometric deviations in ligand moieties.
  • Evaluation of the potential impact of advanced refinement techniques.

Main Results:

  • Evidence indicates widespread issues with ligand geometry refinement in cocrystal structures.
  • Observed errors include nonideal bond lengths/angles, strained conformations, and poor contacts.
  • These problems are linked to the limitations of current refinement strategies.

Conclusions:

  • Poorly refined ligand geometries are a significant challenge in structural biology.
  • Implementing enhanced refinement models is essential for improving structural accuracy.
  • Better models will lead to more reliable protein-ligand interaction data for drug development.