1IU6

Neutron Crystal Structure of the rubredoxin mutant from Pyrococcus Furiosus


Experimental Data Snapshot

  • Method: NEUTRON DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.201 

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This is version 1.5 of the entry. See complete history


Literature

A neutron crystallographic analysis of a rubredoxin mutant at 1.6 A resolution.

Chatake, T.Kurihara, K.Tanaka, I.Tsyba, I.Bau, R.Jenney, F.E.Adams, M.W.Niimura, N.

(2004) Acta Crystallogr D Biol Crystallogr 60: 1364-1373

  • DOI: 10.1107/S090744490401176X
  • Primary Citation of Related Structures:  
    1IU6, 1IU5

  • PubMed Abstract: 
  • A neutron diffraction study has been carried out at 1.6 A resolution on a mutant rubredoxin from Pyrococcus furiosus using the BIX-3 single-crystal diffractometer at the JRR-3 reactor of the Japan Atomic Energy Research Institute. In order to study the unusual thermostability of rubredoxin from P ...

    A neutron diffraction study has been carried out at 1.6 A resolution on a mutant rubredoxin from Pyrococcus furiosus using the BIX-3 single-crystal diffractometer at the JRR-3 reactor of the Japan Atomic Energy Research Institute. In order to study the unusual thermostability of rubredoxin from P. furiosus (an organism that grows optimally at 373 K), the hydrogen-bonding patterns were compared between the wild-type protein and a 'triple-mutant' variant. In this mutant protein, three residues were changed (Trp3-->Tyr3, Ile23-->Val23, Leu32-->Ile32) so that they are identical to those in a mesophilic rubredoxin from Clostridium pasteurianum. In the present study, some minor changes were found between the wild-type and mutant proteins in the hydrogen-bonding patterns of the Trp3/Tyr3 region. In this investigation, the H/D-exchange ratios in the protein were also studied. Because the target protein was soaked in D2O during the crystallization procedure, most of the N-H and O-H bonds have become deuterated, while essentially all of the C-H bonds have not. In particular, the H/D-exchange pattern of the N-H amide bonds of the protein backbone is of interest because it may contain some indirect information about the mechanism of unfolding of this small protein. The results are in broad agreement with those from solution NMR studies, which suggest that the backbone amide bonds near the four Cys residues of the FeS4 redox center are most resistant to H/D exchange. Finally, the detailed geometries of the water molecules of hydration around the rubredoxin molecule are also reported. The 1.6 A resolution of the present neutron structure determination has revealed a more detailed picture than previously available of some portions of the water structure, including ordered and disordered O-D bonds. Crystallographic details: space group P2(1)2(1)2(1) (orthorhombic), unit-cell parameters a = 34.48, b = 35.70, c = 43.16 A; final agreement factors R = 0.196 and Rfree = 0.230 for 19,384 observed and 6548 unique neutron reflections collected at room temperature; crystal size 4 mm3; a total of 423 non-H atoms, 290 H atoms and 88 D atoms were located in this study.


    Organizational Affiliation

    Neutron Structural Biology Group, Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
rubredoxinA53Pyrococcus furiosusMutation(s): 3 
UniProt
Find proteins for P24297 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore P24297 
Go to UniProtKB:  P24297
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FE
Query on FE

Download Ideal Coordinates CCD File 
B [auth A]FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: NEUTRON DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 34.48α = 90
b = 35.7β = 90
c = 43.16γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-08-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2018-03-07
    Changes: Data collection
  • Version 1.4: 2018-11-28
    Changes: Data collection
  • Version 1.5: 2018-12-05
    Changes: Data collection