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Related Experiment Videos

FLAME: a program to flexibly align molecules.

Sung Jin Cho1, Yaxiong Sun

  • 1Molecular Structure, Amgen Inc., MS 29-M-B, Thousand Oaks, California 91320, USA. sung.jin.cho@amgen.com

Journal of Chemical Information and Modeling
|January 24, 2006
PubMed
Summary
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Flexible alignment of molecules (FLAME) accurately aligns structures and identifies common pharmacophores. This method enhances database searching by finding structurally diverse hits, improving drug discovery efforts.

Area of Science:

  • Computational chemistry
  • Cheminformatics
  • Molecular modeling

Background:

  • Accurate molecular alignment is crucial for understanding structure-activity relationships.
  • Existing methods may struggle with conformational flexibility and identifying shared features.

Purpose of the Study:

  • Introduce FLAME (FLexibly Align MolEcules), a novel method for molecular alignment.
  • Evaluate FLAME's performance in pairwise alignment, multiple flexible alignment, and database searching.

Main Methods:

  • FLAME utilizes a genetic algorithm to find maximum common pharmacophores.
  • Alignments undergo simultaneous optimization of internal energies and alignment scores.
  • Tested on carboxypeptidase, estrogen receptor, and thrombin ligands, as well as D3 receptor ligands.

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Main Results:

  • FLAME achieved high accuracy in pairwise alignment, comparable to X-ray structures (average RMSD = 0.36 Å).
  • Successfully identified key pharmacophores (base, H-bond acceptor, hydrophobe/aromatic ring) in multiple flexible alignments.
  • Database searches using FLAME yielded structurally more diverse hits than traditional fingerprint methods.

Conclusions:

  • FLAME provides a robust and accurate method for flexible molecular alignment.
  • The approach effectively identifies common pharmacophores and improves the diversity of retrieved compounds in database searches.
  • FLAME shows significant potential for advancing drug discovery and lead optimization.