3D3W

Structure of L-Xylulose Reductase with bound coenzyme, phosphate and hydroxide.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure/function analysis of a critical disulfide bond in the active site of L-xylulose reductase.

Zhao, H.T.Endo, S.Ishikura, S.Chung, R.Hogg, P.J.Hara, A.El-Kabbani, O.

(2009) Cell.Mol.Life Sci. 66: 1570-1579

  • DOI: 10.1007/s00018-009-9065-y

  • PubMed Abstract: 
  • L-xylulose reductase (XR) is involved in water re-absorption and cellular osmoregulation. The crystal structure of human XR complemented with site-directed mutagenesis (Cys138Ala) indicated that the disulfide bond in the active site between Cys138 an ...

    L-xylulose reductase (XR) is involved in water re-absorption and cellular osmoregulation. The crystal structure of human XR complemented with site-directed mutagenesis (Cys138Ala) indicated that the disulfide bond in the active site between Cys138 and Cys150 is unstable and may affect the reactivity of the enzyme. The effects of reducing agents on the activities of the wild-type and mutant enzymes indicated the reversibility of disulfide-bond formation, which resulted in three-fold decrease in catalytic efficiency. Furthermore, the addition of cysteine (>2 mM) inactivated human XR and was accompanied by a 10-fold decrease in catalytic efficiency. TOF-MS analysis of the inactivated enzyme showed the S-cysteinylation of Cys138 in the wild-type and Cys150 in the mutant enzymes. Thus, the action of human XR may be regulated by cellular redox conditions through reversible disulfide-bond formation and by S-cysteinylation.


    Organizational Affiliation

    Medicinal Chemistry and Drug Action, Monash Institute of Pharmaceutical Sciences, 381 Royal Parade, Parkville, Victoria, 3052, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-xylulose reductase
A
244Homo sapiensMutation(s): 0 
Gene Names: DCXR (SDR20C1)
EC: 1.1.1.10
Find proteins for Q7Z4W1 (Homo sapiens)
Go to Gene View: DCXR
Go to UniProtKB:  Q7Z4W1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
L-xylulose reductase
B
244Homo sapiensMutation(s): 0 
Gene Names: DCXR (SDR20C1)
EC: 1.1.1.10
Find proteins for Q7Z4W1 (Homo sapiens)
Go to Gene View: DCXR
Go to UniProtKB:  Q7Z4W1
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
NAP
Query on NAP

Download SDF File 
Download CCD File 
A, B
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
A, B
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.204 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 73.678α = 90.00
b = 87.476β = 90.00
c = 72.168γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
REFMACrefinement
HKL-2000data reduction
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-04-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance