Biochemistry (Moscow)

, Volume 82, Issue 13, pp 1702–1715 | Cite as

Three-finger proteins from the Ly6/uPAR family: Functional diversity within one structural motif

  • N. A. Vasilyeva
  • E. V. Loktyushov
  • M. L. Bychkov
  • Z. O. Shenkarev
  • E. N. LyukmanovaEmail author


The discovery in higher animals of proteins from the Ly6/uPAR family, which have structural homology with snake “three-finger” neurotoxins, has generated great interest in these molecules and their role in the functioning of the organism. These proteins have been found in the nervous, immune, endocrine, and reproductive systems of mammals. There are two types of the Ly6/uPAR proteins: those associated with the cell membrane by GPI-anchor and secreted ones. For some of them (Lynx1, SLURP-1, SLURP-2, Lypd6), as well as for snake α-neurotoxins, the target of action is nico- tinic acetylcholine receptors, which are widely represented in the central and peripheral nervous systems, and in many other tissues, including epithelial cells and the immune system. However, the targets of most proteins from the Ly6/uPAR family and the mechanism of their action remain unknown. This review presents data on the structural and functional properties of the Ly6/uPAR proteins, which reveal a variety of functions within a single structural motif.


three-finger proteins nicotinic acetylcholine receptor Ly6/uPAR Lynx1 Lypd6 SLURP 







gamma-aminobutyric acid


glycophos-phatidylinositol anchor


lymphocyte antigen 6


muscarinic acetylcholine receptor


nicotinic acetyl-choline receptor


tissue plasminogen activator


urokinase plasminogen activator receptor


nonconven-tional toxin from Naja kaouthia


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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • N. A. Vasilyeva
    • 1
    • 2
    • 3
  • E. V. Loktyushov
    • 1
    • 2
  • M. L. Bychkov
    • 2
  • Z. O. Shenkarev
    • 2
  • E. N. Lyukmanova
    • 1
    • 2
    Email author
  1. 1.Faculty of BiologyLomonosov Moscow State UniversityMoscowRussia
  2. 2.Shemyakin−Ovchinnikov Institute of Bioorganic ChemistryRussian Academy of SciencesMoscowRussia
  3. 3.Institute of Higher Nervous Activity and NeurophysiologyRussian Academy of SciencesMoscowRussia

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