5PXM

PanDDA analysis group deposition -- Crystal Structure of SP100 after initial refinement with no ligand modelled (structure 46)

Summary for 5PXM

• Entry DOI: 10.2210/pdb5pxm/pdb
• Group deposition: PanDDA analysis group deposition of models of ground state datasets (G_1002025)
• Descriptor: Nuclear autoantigen Sp-100, ZINC ION, 2-(N-MORPHOLINO)-ETHANESULFONIC ACID, ... (5 entities in total)
• Functional Keywords: pandda, sgc - diamond i04-1 fragment screening, bromodomain, epigenetics, xchemexplorer, transcription
• Biological source: Homo sapiens (Human)
• Cellular location: Nucleus. Isoform Sp100-C: Nucleus : P23497
• Total number of polymer chains: 2
• Total formula weight: 43643.55

Authors

Pearce, N.M.,Krojer, T.,Talon, R.,Bradley, A.R.,Fairhead, M.,Sethi, R.,Wright, N.,MacLean, E.,Collins, P.,Brandao-Neto, J.,Douangamath, A.,Renjie, Z.,Dias, A.,Ng, J.,Brennan, P.E.,Cox, O.,Bountra, C.,Arrowsmith, C.H.,Edwards, A.,von Delft, F. (deposition date: 2017-02-08, release date: 2017-03-22, Last modification date: 2024-03-06)

Primary citation

Pearce, N.M.,Krojer, T.,Bradley, A.R.,Collins, P.,Nowak, R.P.,Talon, R.,Marsden, B.D.,Kelm, S.,Shi, J.,Deane, C.M.,von Delft, F.
A multi-crystal method for extracting obscured crystallographic states from conventionally uninterpretable electron density.
Nat Commun, 8:15123-15123, 2017

PubMed Abstract: In macromolecular crystallography, the rigorous detection of changed states (for example, ligand binding) is difficult unless signal is strong. Ambiguous ('weak' or 'noisy') density is experimentally common, since molecular states are generally only fractionally present in the crystal. Existing methodologies focus on generating maximally accurate maps whereby minor states become discernible; in practice, such map interpretation is disappointingly subjective, time-consuming and methodologically unsound. Here we report the PanDDA method, which automatically reveals clear electron density for the changed state-even from inaccurate maps-by subtracting a proportion of the confounding 'ground state'; changed states are objectively identified from statistical analysis of density distributions. The method is completely general, implying new best practice for all changed-state studies, including the routine collection of multiple ground-state crystals. More generally, these results demonstrate: the incompleteness of atomic models; that single data sets contain insufficient information to model them fully; and that accuracy requires further map-deconvolution approaches.

PubMed: 28436492
DOI: 10.1038/ncomms15123

Experimental method

X-RAY DIFFRACTION (1.59 Å)