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Multifunctional snake C-type lectins affecting platelets.

K J Clemetson1, A Navdaev, D Dörmann

  • 1Theodor Kocher Institute, University of Berne, Freiestrasse 1, CH-3012 Berne, Switzerland. clemetson@tki.unibe.ch

Haemostasis
|March 23, 2002
PubMed
Summary
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Snake C-type lectins, found in venom, impact blood clotting by interacting with platelets and coagulation factors. Recent research reveals these proteins often bind multiple targets, exhibiting complex actions.

Area of Science:

  • Biochemistry
  • Toxicology
  • Molecular Biology

Background:

  • Snake venoms possess diverse components affecting hemostasis.
  • Snake C-type lectins share structural similarities with classical C-type lectins but are typically heterodimeric.
  • Echicetin, an early example, binds platelet GPIb, inhibiting its function.

Purpose of the Study:

  • To investigate the structure and function of snake C-type lectins.
  • To understand the mechanisms by which these lectins interact with hemostatic factors.
  • To explore the ligand-binding specificities of snake C-type lectins.

Main Methods:

  • Structural analysis of snake C-type lectins.
  • Biochemical assays to assess interactions with platelet receptors and coagulation factors.

Related Experiment Videos

  • Crystallography of selected snake C-type lectins.

    • Main Results:

    • Snake C-type lectins are generally heterodimeric proteins with alpha and beta subunits.
    • These lectins exhibit diverse interactions with platelet receptors (e.g., GPIb) and coagulation factors.
    • Contrary to earlier beliefs, most snake C-type lectins bind to multiple ligands.

    Conclusions:

    • Snake C-type lectins represent a significant class of venom components influencing hemostasis.
    • Their complex multi-ligand binding capabilities suggest sophisticated mechanisms of action.
    • Further research into these lectins could yield novel insights into hemostatic regulation and therapeutic targets.