A bacterial protein structure in glycoside hydrolase family 31

Experimental Data Snapshot

  • Resolution: 1.91 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Yihq is a Sulfoquinovosidase that Cleaves Sulfoquinovosyl Diacylglyceride Sulfolipids.

Speciale, G.Jin, Y.Davies, G.J.Williams, S.J.Goddard-Borger, E.D.

(2016) Nat Chem Biol 12: 215

  • DOI: https://doi.org/10.1038/nchembio.2023
  • Primary Citation of Related Structures:  
    5AED, 5AEE, 5AEG

  • PubMed Abstract: 

    Sulfoquinovose is produced by photosynthetic organisms at a rate of 10(10) tons per annum and is degraded by bacteria as a source of carbon and sulfur. We have identified Escherichia coli YihQ as the first dedicated sulfoquinovosidase and the gateway enzyme to sulfoglycolytic pathways. Structural and mutagenesis studies unveiled the sequence signatures for binding the distinguishing sulfonate residue and revealed that sulfoquinovoside degradation is widespread across the tree of life.

  • Organizational Affiliation

    School of Chemistry, University of Melbourne, Parkville, Victoria, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
686Escherichia coli K-12Mutation(s): 0 
EC: 3.2.1
Find proteins for P32138 (Escherichia coli (strain K12))
Explore P32138 
Go to UniProtKB:  P32138
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32138
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.91 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.71α = 90
b = 113.177β = 109.23
c = 111.72γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-02-10
    Type: Initial release
  • Version 1.1: 2016-03-02
    Changes: Database references
  • Version 1.2: 2016-03-30
    Changes: Database references
  • Version 1.3: 2019-05-08
    Changes: Data collection, Experimental preparation, Other