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Molprobity sites:
Duke (US) | Manchester (UK) | Beta (Recent developments; Unstable)
Legacy version 4.02 has been retired. Please contact us through the 'Feedback & bugs' link if this affects your MolProbity use.

Usage Guidelines:
These web services are provided for analysis of individual structures, not batch runs.

Walkthroughs, tutorials, and usage FAQs:

Evaluate X-ray structure: Typical steps for a published X-ray crystal structure or one still undergoing refinement.

Evaluate NMR structure: Typical steps for a published NMR ensemble or one still undergoing refinement.

Fix up structure: Rebuild the model to remove outliers as part of the refinement cycle.

Work with kinemages: Create and view interactive 3-D graphics from your web browser.

Guide to Reduce options: Learn about adding hydrogens to a structure for all-atom contact analysis.

Guide to validation options: Choose validations appropriate to a structure.

What's new in 4.4

  • This versioned release is timed to correspond with the Phenix 1.12 official release, and is expected to work with the corresponding version of the cctbx project.
  • MolProbity now provides simultaneous validation for ensemble structures up to 80 models. After validation is complete, use the tabs to switch between the results for the models.
  • MolProbity now accepts mmCIF file uploads and can fetch structures only available as mmCif. These files will be automatically converted to PDB hybrid36 format for validation.
  • Severely twisted peptides (more than 45° from planar) are now colored red in the multicriterion chart, like other especially severe outliers.
  • Limited CaBLAM validation now available for CA-only models.
  • More user control of feedback for non-trans peptides is available in the validation selection menu.

What's new in 4.3.1:

  • This versioned release is timed to correspond with the Phenix 1.11 official release, and is expected to work with the corresponding version of the cctbx project.
  • Update to Omegalyze kinemage output - markup now offset from backbone to reduce overlap with other markups.
  • Ramachandran analysis reports alternate conformations more comprehensively at the residue level. Ramachandran summary statistics are given for alternate A only where applicable.
  • Reduce het dictionary updated - hydrogens now available for more ligands.
  • Reduce no longer rotates methionine sidechain methyls.

What's new in 4.3:

  • New NQH coordinate regularization method after flips in Reduce: a three-step process attempting to match existing coordinates replaces cctbx-based optimization
  • Updates to Omegalyze kinemage output - markup defaults to 'off', separate colors for cis-pro (sea), cis-nonpro (lime), and all twisted (yellow).
  • Improved error catching, with 'how to fix it' notes for common formatting errors

Citations, science, and technical FAQs:

Cite MolProbity: Chen et al. (2010) MolProbity: all-atom structure validation for macromolecular crystallography. Acta Crystallographica D66:12-21.


Davis et al. (2007) MolProbity: all-atom contacts and structure validation for proteins and nucleic acids. Nucleic Acids Research 35:W375-W383.

Cite KiNG: Chen et al. (2009) KiNG (Kinemage, Next Generation): A versatile interactive molecular and scientific visualization program. Protein Science 18:2403-2409.

Cite CCTBX: Grosse-Kunstleve et al. (2002) The Computational Crystallography Toolbox: crystallographic algorithms in a reusable software framework. J. Appl. Cryst. 35:126-136.

About hydrogens: Why have the hydrogen bondlengths changed?

Installing Java: how to make kinemage graphics work in your browser.

Download MolProbity: how can I run a private MolProbity server, or run from the command line?

NB: the back button doesn't work inside MolProbity