3KYY

Joint Xray/neutron crystal structure determination of H-labeled perdeuterated rubredoxin at 295K


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.145 

  • Method: NEUTRON DIFFRACTION
  • Resolution: 1.66 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Unambiguous determination of H-atom positions: comparing results from neutron and high-resolution X-ray crystallography.

Gardberg, A.S.Del Castillo, A.R.Weiss, K.L.Meilleur, F.Blakeley, M.P.Myles, D.A.

(2010) Acta Crystallogr.,Sect.D 66: 558-567

  • DOI: 10.1107/S0907444910005494
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The locations of H atoms in biological structures can be difficult to determine using X-ray diffraction methods. Neutron diffraction offers a relatively greater scattering magnitude from H and D atoms. Here, 1.65 A resolution neutron diffraction stud ...

    The locations of H atoms in biological structures can be difficult to determine using X-ray diffraction methods. Neutron diffraction offers a relatively greater scattering magnitude from H and D atoms. Here, 1.65 A resolution neutron diffraction studies of fully perdeuterated and selectively CH(3)-protonated perdeuterated crystals of Pyrococcus furiosus rubredoxin (D-rubredoxin and HD-rubredoxin, respectively) at room temperature (RT) are described, as well as 1.1 A resolution X-ray diffraction studies of the same protein at both RT and 100 K. The two techniques are quantitatively compared in terms of their power to directly provide atomic positions for D atoms and analyze the role played by atomic thermal motion by computing the sigma level at the D-atom coordinate in simulated-annealing composite D-OMIT maps. It is shown that 1.65 A resolution RT neutron data for perdeuterated rubredoxin are approximately 8 times more likely overall to provide high-confidence positions for D atoms than 1.1 A resolution X-ray data at 100 K or RT. At or above the 1.0sigma level, the joint X-ray/neutron (XN) structures define 342/378 (90%) and 291/365 (80%) of the D-atom positions for D-rubredoxin and HD-rubredoxin, respectively. The X-ray-only 1.1 A resolution 100 K structures determine only 19/388 (5%) and 8/388 (2%) of the D-atom positions above the 1.0sigma level for D-rubredoxin and HD-rubredoxin, respectively. Furthermore, the improved model obtained from joint XN refinement yielded improved electron-density maps, permitting the location of more D atoms than electron-density maps from models refined against X-ray data only.


    Organizational Affiliation

    Oak Ridge National Laboratory, USA. anna.s.gardberg@gmail.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Rubredoxin
A
54Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1)Mutation(s): 0 
Gene Names: rub
Find proteins for P24297 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Go to UniProtKB:  P24297
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FE
Query on FE

Download SDF File 
Download CCD File 
A
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
DOD
Query on DOD

Download SDF File 
Download CCD File 
A
DEUTERATED WATER
D2 O
XLYOFNOQVPJJNP-ZSJDYOACSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.145 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 34.238α = 90.00
b = 35.096β = 90.00
c = 43.858γ = 90.00
  • Method: NEUTRON DIFFRACTION
  • Resolution: 1.66 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.187 
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
SCALAdata processing
LAUEGENdata reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2009-12-07 
  • Released Date: 2010-04-28 
  • Deposition Author(s): Gardberg, A.S.

Revision History 

  • Version 1.0: 2010-04-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-09-14
    Type: Database references