Cited by 73Proteoglycans and glycosaminoglycans researchGlycosylation and Glycoproteins ResearchProtein Structure and Dynamics

Towards a Structure for a TSG-6·Hyaluronan Complex by Modeling and NMR Spectroscopy

Open access
Blundell, Charles D., Almond, Andrew, Mahoney, David J., DeAngelis, Paul L., Campbell, Iain D., Day, Anthony J.·2005·Journal of Biological Chemistry

Abstract

The Link module from human TSG-6, a hyaladherin with roles in ovulation and inflammation, has a hyaluronan (HA)-binding groove containing two adjacent tyrosine residues that are likely to form CH-pi stacking interactions with sequential rings in the sugar. We have used this observation to construct a model of a protein.HA complex, which was then tested against existing experimental information and by acquisition of new NMR data sets of [(13)C, (15)N]HA (8-mer) complexed with unlabeled protein. A major finding of this analysis was that acetamido side chains of two GlcNAc rings fit into hydrophobic pockets on either side of the adjacent tyrosines, providing a selectivity mechanism of HA over other polysaccharides. Furthermore, two basic residues have a separation that matches that of glucuronic acids in the sugar, consistent with the formation of salt bridges; NMR experiments at a range of pH values identified protein groups that titrate due to their proximity to a free carboxylate in HA. Sequence alignment and construction of homology models for all human Link modules in their HA-bound states revealed that many of these features are conserved across the superfamily, thus allowing the prediction of functionally important residues. In the case of cartilage link protein, its two Link modules were docked together (using bound HA as a guide), identifying hydrophobic residues likely to form an intra-Link module interface as well as amino acids that could be involved in supporting intermolecular interactions between link proteins and chondroitin sulfate proteoglycans. Here, we propose a mechanism for ternary complex formation that generates higher order helical structures, as may exist in cartilage aggregates.

Integrity signals

Registry

Crossref · 10.1074/jbc.m414343200

Cites

69 of 69 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Blundell, C. D., Almond, A., Mahoney, D. J., DeAngelis, P. L., Campbell, I. D., & Day, A. J.
Affiliations
  • University of Oxford (GB)
  • University of Oklahoma Health Sciences Center (US)
Corresponding author
Day, Anthony J.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2005-05
Volume
280
Issue
18
Pages
18189-18201
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2017606019
Cited by
73
References
69
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 3 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 4 · 2017: 1 · 2016: 5 · 2015: 4 · 2014: 3 · 2013: 3 · 2012: 3
FWCI
3.52
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Research Explorer (The University of Manchester) (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Proteoglycans and glycosaminoglycans research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Glycosylation and Glycoproteins Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
Keywords
TSG-6, hyaluronic acid, Link module, hyaladherins, protein-polysaccharide complexes, tyrosine side chain, hydrophobic pocket, salt bridges, glucuronic acid, pH titration, homology modeling, chondroitin sulfate proteoglycans, ternary complex formation, helical conformation
MeSH terms
Acetylglucosamine, Amino Acid Sequence, Animals, Multigene Family, Humans, Hyaluronic Acid, Male, Models, Molecular, Molecular Sequence Data, Magnetic Resonance Spectroscopy, Protein Binding, Protein Conformation, Sheep, Cell Adhesion Molecules, Mutagenesis, Site-Directed, Conserved Sequence, Sequence Homology, Amino Acid, Protein Structure, Secondary, Protein Structure, Tertiary, Amino Acid Motifs

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review