3LLI

Sulfhydryl Oxidase Fragment of Human QSOX1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.275 

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Ligand Structure Quality Assessment 


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

  • 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. 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)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sulfhydryl oxidase 1261Homo sapiensMutation(s): 0 
Gene Names: QSCN6QSOX1UNQ2520/PRO6013
EC: 1.8.3.2
UniProt & NIH Common Fund Data Resources
Find proteins for O00391 (Homo sapiens)
Explore O00391 
Go to UniProtKB:  O00391
PHAROS:  O00391
GTEx:  ENSG00000116260 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO00391
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
B [auth A]FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.275 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.606α = 90
b = 85.606β = 90
c = 125.706γ = 120
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance