3LLK

Sulfhydryl Oxidase Fragment of Human QSOX1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.237 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

QSOX contains a pseudo-dimer of functional and degenerate sulfhydryl oxidase domains.

Alon, A.Heckler, E.J.Thorpe, C.Fass, D.

(2010) FEBS Lett 584: 1521-1525

  • DOI: 10.1016/j.febslet.2010.03.001
  • Primary Citation of Related Structures:  
    3LLK, 3LLI

  • PubMed Abstract: 
  • Quiescin sulfhydryl oxidase (QSOX) catalyzes formation of disulfide bonds between cysteine residues in substrate proteins. Human QSOX1 is a multi-domain, monomeric enzyme containing a module related to the single-domain sulfhydryl oxidases of the Erv family ...

    Quiescin sulfhydryl oxidase (QSOX) catalyzes formation of disulfide bonds between cysteine residues in substrate proteins. Human QSOX1 is a multi-domain, monomeric enzyme containing a module related to the single-domain sulfhydryl oxidases of the Erv family. A partial QSOX1 crystal structure reveals a single-chain pseudo-dimer mimicking the quaternary structure of Erv enzymes. However, one pseudo-dimer "subunit" has lost its cofactor and catalytic activity. In QSOX evolution, a further concatenation to a member of the protein disulfide isomerase family resulted in an enzyme capable of both disulfide formation and efficient transfer to substrate proteins.


    Organizational Affiliation

    Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Sulfhydryl oxidase 1 ABC261Homo sapiensMutation(s): 0 
Gene Names: QSCN6QSOX1UNQ2520/PRO6013
EC: 1.8.3.2
Find proteins for O00391 (Homo sapiens)
Explore O00391 
Go to UniProtKB:  O00391
NIH Common Fund Data Resources
PHAROS:  O00391
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
A, B, C
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
FLC
Query on FLC

Download Ideal Coordinates CCD File 
A
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.237 
  • Space Group: C 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.481α = 90
b = 161.573β = 90
c = 121.94γ = 90
Software Package:
Software NamePurpose
PHASERphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2010-01-29 
  • Released Date: 2010-03-31 
  • Deposition Author(s): Alon, A., Fass, D.

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-31
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance