title: MESMER: minimal ensemble solutions to multiple experimental restraints.
abstract: BACKGROUND
  Macromolecular structures and interactions are intrinsically heterogeneous, temporally adopting a range of configurations that can confound the analysis of data from bulk experiments. To obtain quantitative insights into heterogeneous systems, an ensemble-based approach can be employed, in which predicted data computed from a collection of models is compared to the observed experimental results. By simultaneously fitting orthogonal structural data (e.g. small-angle X-ray scattering, nuclear magnetic resonance residual dipolar couplings, dipolar electron-electron resonance spectra), the range and population of accessible macromolecule structures can be probed.
  
  
  RESULTS
  We have developed MESMER, software that enables the user to identify ensembles that can recapitulate experimental data by refining thousands of component collections selected from an input pool of potential structures. The MESMER suite includes a powerful graphical user interface (GUI) to streamline usage of the command-line tools, calculate data from structure libraries and perform analyses of conformational and structural heterogeneity. To allow for incorporation of other data types, modular Python plugins enable users to compute and fit data from nearly any type of quantitative experimental data.
  
  
  RESULTS
  Conformational heterogeneity in three macromolecular systems was analyzed with MESMER, demonstrating the utility of the streamlined, user-friendly software.
  
  
  METHODS
  https://code.google.com/p/mesmer/
authors: Ohio State University Biophysics Program, Department of Chemistry and Biochemistry, and Center for RNA Biology, The Ohio State University, Columbus, OH, USA Ohio State University Biophysics Program, Department of Chemistry and Biochemistry, and Center for RNA Biology, The Ohio State University, Columbus, OH, USA.
authors: Elihu C
authors: EC
authors: Ihms
authors: Ohio State University Biophysics Program, Department of Chemistry and Biochemistry, and Center for RNA Biology, The Ohio State University, Columbus, OH, USA Ohio State University Biophysics Program, Department of Chemistry and Biochemistry, and Center for RNA Biology, The Ohio State University, Columbus, OH, USA Ohio State University Biophysics Program, Department of Chemistry and Biochemistry, and Center for RNA Biology, The Ohio State University, Columbus, OH, USA.
authors: Mark P
authors: MP
authors: Foster
mesh_terms: D000135:Acid Phosphatase / Q000737:chemistry; D002147:Calmodulin / Q000737:chemistry; D019295:Computational Biology / Q000379:methods*; D003198:Computer Simulation; D056827:Endosomal Sorting Complexes Required for Transport / Q000737:chemistry; D006801:Humans; D007527:Isoenzymes / Q000737:chemistry; D008958:Models, Molecular; D046912:Multiprotein Complexes / Q000737:chemistry*; D019906:Nuclear Magnetic Resonance, Biomolecular; D011487:Protein Conformation; D053838:Scattering, Small Angle; D012984:Software; D000071681:Tartrate-Resistant Acid Phosphatase
chemical_list: D002147:Calmodulin; D056827:Endosomal Sorting Complexes Required for Transport; D007527:Isoenzymes; D046912:Multiprotein Complexes; D000135:Acid Phosphatase; D000071681:Tartrate-Resistant Acid Phosphatase