3KCO

Room temperature neutron structure of D-Xylose Isomerase in complex with two Ni2+ cations and d12-D-glucose in the linear form (refined jointly with X-ray structure 3KBN)


Experimental Data Snapshot

  • Method: NEUTRON DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.273 

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.199 

wwPDB Validation

Currently 3KCO does not have a wwPDB validation report.


This is version 1.2 of the entry. See complete history

Literature

Metal ion roles and the movement of hydrogen during reaction catalyzed by D-xylose isomerase: a joint x-ray and neutron diffraction study.

Kovalevsky, A.Y.Hanson, L.Fisher, S.Z.Mustyakimov, M.Mason, S.A.Forsyth, V.T.Blakeley, M.P.Keen, D.A.Wagner, T.Carrell, H.L.Katz, A.K.Glusker, J.P.Langan, P.

(2010) Structure 18: 688-699

  • DOI: 10.1016/j.str.2010.03.011
  • Primary Citation of Related Structures:  3KBM, 3KBN, 3KBS, 3KBV, 3KBW, 3KCL

  • PubMed Abstract: 
  • Conversion of aldo to keto sugars by the metalloenzyme D-xylose isomerase (XI) is a multistep reaction that involves hydrogen transfer. We have determined the structure of this enzyme by neutron diffraction in order to locate H atoms (or their isotop ...

    Conversion of aldo to keto sugars by the metalloenzyme D-xylose isomerase (XI) is a multistep reaction that involves hydrogen transfer. We have determined the structure of this enzyme by neutron diffraction in order to locate H atoms (or their isotope D). Two studies are presented, one of XI containing cadmium and cyclic D-glucose (before sugar ring opening has occurred), and the other containing nickel and linear D-glucose (after ring opening has occurred but before isomerization). Previously we reported the neutron structures of ligand-free enzyme and enzyme with bound product. The data show that His54 is doubly protonated on the ring N in all four structures. Lys289 is neutral before ring opening and gains a proton after this; the catalytic metal-bound water is deprotonated to hydroxyl during isomerization and O5 is deprotonated. These results lead to new suggestions as to how changes might take place over the course of the reaction.


    Organizational Affiliation

    Bioscience Division, Los Alamos National Laboratory, MS M888, Los Alamos, NM 87545, USA. ayk@lanl.gov




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Xylose isomerase
A
388Streptomyces rubiginosusGene Names: xylA
EC: 5.3.1.5
Find proteins for P24300 (Streptomyces rubiginosus)
Go to UniProtKB:  P24300
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLO
Query on GLO

Download SDF File 
Download CCD File 
A
D-GLUCOSE IN LINEAR FORM
C6 H12 O6
GZCGUPFRVQAUEE-SLPGGIOYSA-N
 Ligand Interaction
NI
Query on NI

Download SDF File 
Download CCD File 
A
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-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: NEUTRON DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.273 
  • Method: X-RAY DIFFRACTION
  • Resolution: 1.53 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.199 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 94.007α = 90.00
b = 99.669β = 90.00
c = 102.862γ = 90.00
Software Package:
Software NamePurpose
LAUENORMdata scaling
nCNSphasing
PCSdata collection
nCNSrefinement
d*TREKdata reduction

Structure Validation

Currently 3KCO does not have a wwPDB validation report.



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-06-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2011-07-27
    Type: Data collection