Evidence map›Paper›PMID 28552721›Full record

ArticleJournal of structural biology2017

Improved metrics for comparing structures of macromolecular assemblies determined by 3D electron-microscopy.

Agnel Praveen Joseph, Ingvar Lagerstedt, Ardan Patwardhan, Maya Topf, Martyn Winn

Open access · hybridAbstract read
In one paragraph

Article in Journal of structural biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed
4.4field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

42 citing papers in PubMed, 69 citations in OpenAlex.

  1. Article
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  5. Slice'N'Dice: maximizing the value of predicted models for structural biologists.Acta crystallographica. Section D, Structural biology · 2025
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  13. Assessment of three-dimensional RNA structure prediction in CASP15.bioRxiv : the preprint server for biology · 2023
    Article
  14. Likelihood-based signal and noise analysis for docking of models into cryo-EM maps.Acta crystallographica. Section D, Structural biology · 2023
    Article
  15. Protein model refinement for cryo-EM maps using AlphaFold2 and the DAQ score.Acta crystallographica. Section D, Structural biology · 2023
    Article
  16. Review
  17. Review
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  19. Validation analysis of EMDB entries.Acta crystallographica. Section D, Structural biology · 2022
    Article
  20. Atomic model validation using the CCP-EM software suite.Acta crystallographica. Section D, Structural biology · 2022
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 3 institutions in 1 country.

Agnel Praveen JosephInstitute of Structural and Molecular Biology, Department of Biological Sciences, Birkbeck College, University of London, Malet Street, London WC1E 7HX, United Kingdom; Scientific Computing Department, Science and Technology Facilities Council, Research Complex at Harwell, Didcot OX11 0FA, United Kingdom.
Ingvar LagerstedtEuropean Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom; Computational Chemistry and Cheminformatics, Lilly UK, Windlesham GU20 6PH, United Kingdom.
Ardan PatwardhanEuropean Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, Cambridge CB10 1SD, United Kingdom.
Maya TopfInstitute of Structural and Molecular Biology, Department of Biological Sciences, Birkbeck College, University of London, Malet Street, London WC1E 7HX, United Kingdom. Electronic address: m.topf@cryst.bbk.ac.uk.
Martyn WinnScientific Computing Department, Science and Technology Facilities Council, Research Complex at Harwell, Didcot OX11 0FA, United Kingdom. Electronic address: martyn.winn@stfc.ac.uk.
European Bioinformatics Institute · GBScience and Technology Facilities Council · GBInstitute of Structural and Molecular Biology · GB

Funding

Medical Research Council G0600084Medical Research Council MR/M019292/1Medical Research Council MR/N009614/1
6 · The paper itself

Abstract

Recent developments in 3-dimensional electron microcopy (3D-EM) techniques and a concomitant drive to look at complex molecular structures, have led to a rapid increase in the amount of volume data available for biomolecules. This creates a demand for better methods to analyse the data, including improved scores for comparison, classification and integration of data at different resolutions. To this end, we developed and evaluated a set of scoring functions that compare 3D-EM volumes. To test our scores we used a benchmark set of volume alignments derived from the Electron Microscopy Data Bank. We find that the performance of different scores vary with the map-type, resolution and the extent of overlap between volumes. Importantly, adding the overlap information to the local scoring functions can significantly improve their precision and accuracy in a range of resolutions. A combined score involving the local mutual information and overlap (LMI_OV) performs best overall, irrespective of the map category, resolution or the extent of overlap, and we recommend this score for general use. The local mutual information score itself is found to be more discriminatory than cross-correlation coefficient for intermediate-to-low resolution maps or when the map size and density distribution differ significantly. For comparing map surfaces, we implemented two filters to detect the surface points, including one based on the 'extent of surface exposure'. We show that scores that compare surfaces are useful at low resolutions and for maps with evident surface features. All the scores discussed are implemented in TEMPy (http://tempy.ismb.lon.ac.uk/).

Indexed as

Imaging, Three-DimensionalMacromolecular SubstancesMicroscopy, ElectronModels, MolecularMacromolecular Substances3D electron cryo-microscopyDensity fittingIntegrative modellingMacromolecular assembliesScoring functions

Identifiers

PMID28552721
PMCPMC5479444
OpenAlexW2618950916

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.