BT1044SeMet E190Q

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Complex N-glycan breakdown by gut Bacteroides involves an extensive enzymatic apparatus encoded by multiple co-regulated genetic loci.

Briliute, J.Urbanowicz, P.A.Luis, A.S.Basle, A.Paterson, N.Rebello, O.Hendel, J.Ndeh, D.A.Lowe, E.C.Martens, E.C.Spencer, D.I.R.Bolam, D.N.Crouch, L.I.

(2019) Nat Microbiol 4: 1571-1581

  • DOI: https://doi.org/10.1038/s41564-019-0466-x
  • Primary Citation of Related Structures:  
    6Q63, 6Q64

  • PubMed Abstract: 

    Glycans are the major carbon sources available to the human colonic microbiota. Numerous N-glycosylated proteins are found in the human gut, from both dietary and host sources, including immunoglobulins such as IgA that are secreted into the intestine at high levels. Here, we show that many mutualistic gut Bacteroides spp. have the capacity to utilize complex N-glycans (CNGs) as nutrients, including those from immunoglobulins. Detailed mechanistic studies using transcriptomic, biochemical, structural and genetic techniques reveal the pathway employed by Bacteroides thetaiotaomicron (Bt) for CNG degradation. The breakdown process involves an extensive enzymatic apparatus encoded by multiple non-adjacent loci and comprises 19 different carbohydrate-active enzymes from different families, including a CNG-specific endo-glycosidase activity. Furthermore, CNG degradation involves the activity of carbohydrate-active enzymes that have previously been implicated in the degradation of other classes of glycan. This complex and diverse apparatus provides Bt with the capacity to access the myriad different structural variants of CNGs likely to be found in the intestinal niche.

  • Organizational Affiliation

    Department of Microbiology and Immunology, University of Michigan Medical School, Ann Arbor, MI, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Endoglycosidase364Bacteroides thetaiotaomicronMutation(s): 1 
Gene Names: 
Find proteins for A0A0P0FQI4 (Bacteroides thetaiotaomicron)
Explore A0A0P0FQI4 
Go to UniProtKB:  A0A0P0FQI4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0P0FQI4
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.584α = 90
b = 119.584β = 90
c = 83.094γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
Aimlessdata scaling
Cootmodel building

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/M029018/1

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-08
    Type: Initial release
  • Version 1.1: 2019-06-12
    Changes: Data collection, Database references
  • Version 1.2: 2019-09-04
    Changes: Data collection, Database references