Identification of a major GpVI-binding locus in human type III collagen

Gavin Jarvis, N. Raynal, J.P. Langford, D.J. Onley, A. Andrews, P.A. Smethurst, R.W. Farndale

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)

Abstract

We have analyzed the adhesion of human and murine platelets, and of recombinant human and murine GpVI ectodomains, to synthetic triple-helical collagen-like peptides. These included 57 peptides derived from the sequence of human type III collagen and 9 peptides derived from the cyanogen bromide fragment of bovine type III collagen, alpha 1(III)CB4. We have identified several peptides that interact with GpVI, in particular a peptide designated III-30 with the sequence GAOGLRGGAGPOG-PEGGKGAAGPOGPO. Both human and murine platelets bound to peptide III-30 in a GpVI-dependent manner. III-30 also supported binding of recombinant GpVI ectodomains. Cross-linked III-30 induced aggregation of human and murine platelets, although with a lower potency than collagen-related peptide. Modifications of the peptide sequence indicated that the hydroxyproline residues play a significant role in supporting its GpVI reactivity. However, many peptides containing OGP/ GPO motifs did not support adhesion to GpVI. These data indicate that the ability of a triple-helical peptide to bind GpVI is not solely determined by the presence or spatial arrangement of these OGP/GPO motifs within the peptides.
Original languageEnglish
Pages (from-to)4986-4996
Number of pages11
JournalBlood
Volume111
Issue number10
DOIs
Publication statusPublished - 15 May 2008

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Immunology
  • Hematology

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