6QRU

X-ray radiation dose series on xylose isomerase - 2.01 MGy


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.17 Å
  • R-Value Free: 0.119 
  • R-Value Work: 0.101 
  • R-Value Observed: 0.102 

wwPDB Validation   3D Report Full Report


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Literature

Structural knowledge or X-ray damage? A case study on xylose isomerase illustrating both.

Taberman, H.Bury, C.S.van der Woerd, M.J.Snell, E.H.Garman, E.F.

(2019) J Synchrotron Radiat 26: 931-944

  • DOI: 10.1107/S1600577519005599
  • Primary Citation of Related Structures:  
    6QRR, 6QRS, 6QRT, 6QRU, 6QRV, 6QRW, 6QRX, 6QRY

  • PubMed Abstract: 
  • Xylose isomerase (XI) is an industrially important metalloprotein studied for decades. Its reaction mechanism has been postulated to involve movement of the catalytic metal cofactor to several different conformations. Here, a dose-dependent approach was used to investigate the radiation damage effects on XI and their potential influence on the reaction mechanism interpreted from the X-ray derived structures ...

    Xylose isomerase (XI) is an industrially important metalloprotein studied for decades. Its reaction mechanism has been postulated to involve movement of the catalytic metal cofactor to several different conformations. Here, a dose-dependent approach was used to investigate the radiation damage effects on XI and their potential influence on the reaction mechanism interpreted from the X-ray derived structures. Radiation damage is still one of the major challenges for X-ray diffraction experiments and causes both global and site-specific damage. In this study, consecutive high-resolution data sets from a single XI crystal from the same wedge were collected at 100 K and the progression of radiation damage was tracked over increasing dose (0.13-3.88 MGy). The catalytic metal and its surrounding amino acid environment experience a build-up of free radicals, and the results show radiation-damage-induced structural perturbations ranging from an absolute metal positional shift to specific residue motions in the active site. The apparent metal movement is an artefact of global damage and the resulting unit-cell expansion, but residue motion appears to be driven by the dose. Understanding and identifying radiation-induced damage is an important factor in accurately interpreting the biological conclusions being drawn.


    Organizational Affiliation

    Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Xylose isomeraseA388Streptomyces rubiginosusMutation(s): 0 
Gene Names: xylA
EC: 5.3.1.5
UniProt
Find proteins for P24300 (Streptomyces rubiginosus)
Explore P24300 
Go to UniProtKB:  P24300
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP24300
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A],
D [auth A],
E [auth A],
F [auth A],
B [auth A],
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
IPA
Query on IPA

Download Ideal Coordinates CCD File 
N [auth A]ISOPROPYL ALCOHOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
MN
Query on MN

Download Ideal Coordinates CCD File 
O [auth A],
P [auth A]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
Q [auth A],
R [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download Ideal Coordinates CCD File 
S [auth A],
T [auth A]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.17 Å
  • R-Value Free: 0.119 
  • R-Value Work: 0.101 
  • R-Value Observed: 0.102 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.542α = 90
b = 97.544β = 90
c = 102.537γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
Cootmodel building

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Finnish Cultural FoundationFinland--

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-17
    Type: Initial release