2Q4X

Ensemble refinement of the protein crystal structure of gene product from Arabidopsis thaliana At3g16990


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.136 
  • R-Value Observed: 0.136 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history

Re-refinement Note

This entry reflects an alternative modeling of the original data in:2F2G


Literature

Ensemble refinement of protein crystal structures: validation and application.

Levin, E.J.Kondrashov, D.A.Wesenberg, G.E.Phillips, G.N.

(2007) Structure 15: 1040-1052

  • DOI: 10.1016/j.str.2007.06.019
  • Primary Citation of Related Structures:  
    2Q3S, 2Q44, 2Q3R, 2Q43, 2Q3Q, 2Q42, 2Q3P, 2Q41, 2Q3O, 2Q40

  • PubMed Abstract: 
  • X-ray crystallography typically uses a single set of coordinates and B factors to describe macromolecular conformations. Refinement of multiple copies of the entire structure has been previously used in specific cases as an alternative means of represent ...

    X-ray crystallography typically uses a single set of coordinates and B factors to describe macromolecular conformations. Refinement of multiple copies of the entire structure has been previously used in specific cases as an alternative means of representing structural flexibility. Here, we systematically validate this method by using simulated diffraction data, and we find that ensemble refinement produces better representations of the distributions of atomic positions in the simulated structures than single-conformer refinements. Comparison of principal components calculated from the refined ensembles and simulations shows that concerted motions are captured locally, but that correlations dissipate over long distances. Ensemble refinement is also used on 50 experimental structures of varying resolution and leads to decreases in R(free) values, implying that improvements in the representation of flexibility observed for the simulated structures may apply to real structures. These gains are essentially independent of resolution or data-to-parameter ratio, suggesting that even structures at moderate resolution can benefit from ensemble refinement.


    Related Citations: 
    • Crystal structure of gene locus At3g16990 from Arabidopsis thaliana
      Blommel, P.G., Smith, D.W., Bingman, C.A., Dyer, D.H., Rayment, I., Holden, H.M., Fox, B.G., Phillips Jr., G.N.
      (2004) Proteins 57: 221

    Organizational Affiliation

    Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Seed maturation protein PM36 homolog AB221Arabidopsis thalianaMutation(s): 6 
Gene Names: At3g16990K14A17_11K14A17.22TENA_E
EC: 3.5.1 (UniProt), 3.5.99.2 (UniProt)
Find proteins for Q9ASY9 (Arabidopsis thaliana)
Explore Q9ASY9 
Go to UniProtKB:  Q9ASY9
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.136 
  • R-Value Observed: 0.136 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.7α = 90
b = 62.7β = 90
c = 287.621γ = 90
Software Package:
Software NamePurpose
CNSrefinement
PDB_EXTRACTdata extraction
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-06-19
    Type: Initial release
  • Version 1.1: 2007-09-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-08-10
    Changes: Other