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Refinement of docked protein-ligand and protein-DNA structures using low frequency normal mode amplitude optimization
Institut Pasteur, Paris, France.ORCID iD: 0000-0002-2734-2794
Institut Pasteur, Paris, France.
2005 (English)In: Nucleic Acids Research, ISSN 0305-1048, E-ISSN 1362-4962, Vol. 33, no 14, 4496-4506 p.Article in journal (Refereed) Published
Abstract [en]

Prediction of structural changes resulting from complex formation, both in ligands and receptors, is an important and unsolved problem in structural biology. In this work, we use all-atom normal modes calculated with the Elastic Network Model as a basis set to model structural flexibility during formation of macromolecular complexes and refine the non-bonded intermolecular energy between the two partners (protein-ligand or protein-DNA) along 5-10 of the lowest frequency normal mode directions. The method handles motions unrelated to the docking transparently by first applying the modes that improve non-bonded energy most and optionally restraining amplitudes; in addition, the method can correct small errors in the ligand position when the first six rigid-body modes are switched on. For a test set of six protein receptors that show an open-to-close transition when binding small ligands, our refinement scheme reduces the protein coordinate cRMS by 0.3-3.2 A. For two test cases of DNA structures interacting with proteins, the program correctly refines the docked B-DNA starting form into the expected bent DNA, reducing the DNA cRMS from 8.4 to 4.8 A and from 8.7 to 5.4 A, respectively. A public web server implementation of the refinement method is available at

Place, publisher, year, edition, pages
2005. Vol. 33, no 14, 4496-4506 p.
National Category
Biophysics Bioinformatics and Systems Biology
URN: urn:nbn:se:kth:diva-82630DOI: 10.1093/nar/gki730ISI: 000231362600017PubMedID: 16087736OAI: diva2:498425
QC 20120227Available from: 2012-02-12 Created: 2012-02-12 Last updated: 2012-02-27Bibliographically approved

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