title: NOMAD-Ref: visualization, deformation and refinement of macromolecular structures based on all-atom normal mode analysis.
abstract: Normal mode analysis (NMA) is an efficient way to study collective motions in biomolecules that bypasses the computational costs and many limitations associated with full dynamics simulations. The NOMAD-Ref web server presented here provides tools for online calculation of the normal modes of large molecules (up to 100,000 atoms) maintaining a full all-atom representation of their structures, as well as access to a number of programs that utilize these collective motions for deformation and refinement of biomolecular structures. Applications include the generation of sets of decoys with correct stereochemistry but arbitrary large amplitude movements, the quantification of the overlap between alternative conformations of a molecule, refinement of structures against experimental data, such as X-ray diffraction structure factors or Cryo-EM maps and optimization of docked complexes by modeling receptor/ligand flexibility through normal mode motions. The server can be accessed at the URL http://lorentz.immstr.pasteur.fr/nomad-ref.php.
authors.affiliation: Unite de Dynamique Structurale des Macromolécules, URA 2185 du C.N.R.S., Institut Pasteur, 75015 Paris, France.
authors.forename: Erik
authors.initials: E
authors.lastname: Lindahl
authors.forename: Cyril
authors.initials: C
authors.lastname: Azuara
authors.forename: Patrice
authors.initials: P
authors.lastname: Koehl
authors.forename: Marc
authors.initials: M
authors.lastname: Delarue
mesh_terms: D003196:Computer Graphics; D020407:Internet; D008024:Ligands; D046911:Macromolecular Substances / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009038:Motion; D011506:Proteins / Q000737:chemistry; D012984:Software
chemical_list: D008024:Ligands; D046911:Macromolecular Substances; D011506:Proteins