Solution structure of the link module of human tsg-6 in presence of a chondroitin 4-sulfate hexasaccharide

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.4 of the entry. See complete history


Nuclear Magnetic Resonance Insight into the Multiple Glycosaminoglycan Binding Modes of the Link Module from Human TSG-6.

Park, Y.Jowitt, T.A.Day, A.J.Prestegard, J.H.

(2016) Biochemistry 55: 262-276

  • DOI: https://doi.org/10.1021/acs.biochem.5b01148
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Tumor necrosis factor-stimulated gene-6 (TSG-6) is a hyaluronan (HA)-binding protein that is essential for stabilizing and remodeling the extracellular matrix (ECM) during ovulation and inflammatory disease processes such as arthritis. The Link module, one of the domains of TSG-6, is responsible for binding hyaluronan and other glycosaminoglycans found in the ECM. In this study, we used a well-defined chondroitin sulfate (CS) hexasaccharide (ΔC444S) to determine the structure of the Link module, in solution, in its chondroitin sulfate-bound state. A variety of nuclear magnetic resonance techniques were employed, including chemical shift perturbation, residual dipolar couplings (RDCs), nuclear Overhauser effects, spin relaxation measurements, and paramagnetic relaxation enhancements from a spin-labeled analogue of ΔC444S. The binding site for ΔC444S on the Link module overlapped with that of HA. Surprisingly, ΔC444S binding induced dimerization of the Link module (as confirmed by analytical ultracentrifugation), and a second weak binding site that partially overlapped with a previously identified heparin site was detected. A dimer model was generated using chemical shift perturbations and RDCs as restraints in the docking program HADDOCK. We postulate that the molecular cross-linking enhanced by the multiple binding modes of the Link module might be critical for remodeling the ECM during inflammation/ovulation and might contribute to other functions of TSG-6.

  • Organizational Affiliation

    Complex Carbohydrate Research Center, University of Georgia , 315 Riverbend Road, Athens, Georgia 30602, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tumor necrosis factor-inducible gene 6 protein98Homo sapiensMutation(s): 0 
Gene Names: TNFAIP6TSG6
UniProt & NIH Common Fund Data Resources
Find proteins for P98066 (Homo sapiens)
Explore P98066 
Go to UniProtKB:  P98066
PHAROS:  P98066
GTEx:  ENSG00000123610 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP98066
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-01-13
    Type: Initial release
  • Version 1.1: 2016-02-10
    Changes: Database references
  • Version 1.2: 2019-11-06
    Changes: Data collection
  • Version 1.3: 2021-10-27
    Changes: Data collection, Database references, Experimental preparation
  • Version 1.4: 2023-06-14
    Changes: Other