Refinement of Protein Structures into Low-Resolution Density Maps Using Rosetta
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We describe a method based on Rosetta structure refinement for generating high-resolution, all-atom protein models from electron cryomicroscopy density maps. A local measure of the fit of a model to the density is used to directly guide structure refinement and to identify regions incompatible with the density that are then targeted for extensive rebuilding. Over a range of test cases using both simulated and experimentally generated data, the method consistently increases the accuracy of starting models generated either by comparative modeling or by hand-tracing the density. The method can achieve near-atomic resolution starting from density maps at 4-6 A resolution.
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Coot primarily uses a real-space refinement system that only respects local geometry, whereas the Rosetta force field used by Foldit is much more extensive, including additional steric, electrostatic and solvation terms, as well as statistical potentials based on observed backbone torsions and side-chain rotamers.
“Whereas Coot primarily uses a real-space refinement system15 that only respects local geometry, the Rosetta force field used by Foldit is much more extensive, including additional steric, electrostatic and solvation terms, as well as statistical potentials based on observed backbone torsions and side-chain rotamers6.”
From Determining crystal structures through crowdsourcing and coursework (2016) · cites this paper as [6]
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Research works printed but not linked: 25
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- [2]Cowtan K 1998 Modified phased translation functions and their application to molecular fragment location Acta Cryst D 54 750 756 9757089
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- [5]Trabuco LG Villa E Mitra K Frank J Schulten K 2008 Flexible fitting of atomic structures into electron microscopy maps using molecular dynamics Structure 16 673 683 18462672 PMC2430731
- [6]Orzechowski M Tama F 2008 Flexible fitting of high-resolution X-ray structures into cryoelectron microscopy maps using biased molecular dynamics simulations Biophys J 95 5692 5705 18849406 PMC2599853
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- [19]Ludtke SJ Baker ML Chen DH Song JL Chuang DT Chiu W 2008 De novo backbone trace of GroEL from single particle electron cryomicroscopy Structure 16 441 448 18334219
- [20]Baker ML Ju T Chiu W 2007 Identification of secondary structure elements in intermediate-resolution density maps Structure 15 7 19 17223528 PMC1810566
- [21]Bryson K McGuffin LJ Marsden RL Ward JJ Sodhi JS Jones DT 2005 Protein structure prediction servers at University College London Nucl Acids Res 33 W36 38 15980489 PMC1160171
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Self-citation
- Authors
- DiMaio, F., Tyka, M. D., Baker, M. L., Chiu, W., & Baker, D.
- Affiliations
- University of Washington (US)
- Baylor College of Medicine (US)
- Corresponding author
- DiMaio, Frank
- Baker, Matthew L.
- Baker, David
- Venue
- Journal of Molecular Biology
- Publisher
- Elsevier BV
- Published
- 2009-09
- Volume
- 392
- Issue
- 1
- Pages
- 181-190
- ISSN
- 0022-2836 (ISSN-L)
- PMC
- PMC3899897
- OpenAlex
- W1985145180
- Cited by
- 295
- References
- 0
- Citations by year
- 2026: 9 · 2025: 11 · 2024: 10 · 2023: 12 · 2022: 22 · 2021: 11 · 2020: 19 · 2019: 15 · 2018: 22 · 2017: 22 · 2016: 22 · 2015: 24 · 2014: 16 · 2013: 32 · 2012: 20
- FWCI
- 9.21
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- Journal of Molecular Biology (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Science Foundation
- National Institutes of Health
- National Eye Institute (PN2EY016525)
- National Institute of General Medical Sciences (R01GM079429, P41GM103832)
- National Center for Research Resources (P41-RR-02250, P41RR002250)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Advanced Electron Microscopy Techniques and Applications
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
- Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
- Keywords
- protein structure refinement, Rosetta, model rebuilding, homology modeling, atomic resolution
- MeSH terms
- Image Processing, Computer-Assisted, Proteins, Cryoelectron Microscopy
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