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A new Iq-peptide of the Kunitz type from the Heteractis magnifica sea anemone exhibits neuroprotective activity in a model of Alzheimer's disease
Kvetkina, A.N.; Leychenko, E.V.; Yurchenko, E.A.; Pislyagin, E.A.; Peigneur, S.; Tytgat, Y.; Isaeva, M.P.; Aminin, D.L.; Kozlovskaya, E.P. (2018). A new Iq-peptide of the Kunitz type from the Heteractis magnifica sea anemone exhibits neuroprotective activity in a model of Alzheimer's disease. Russian Journal of Bioorganic Chemistry 44(4): 416-423. https://hdl.handle.net/10.1134/S106816201804012X
In: Russian Journal of Bioorganic Chemistry. MAIK NAUKA/INTERPERIODICA/SPRINGER: New York. ISSN 1068-1620; e-ISSN 1608-330X, more
Peer reviewed article  

Available in  Authors 

Keywords
    Heteractis magnifica (Quoy & Gaimard, 1833) [WoRMS]
    Marine
Author keywords
    sea anemone; Kunitz-type protease inhibitors; neuroprotective activity

Authors  Top 
  • Kvetkina, A.N.
  • Leychenko, E.V.
  • Yurchenko, E.A.
  • Pislyagin, E.A.
  • Peigneur, S., more
  • Tytgat, Y.
  • Isaeva, M.P.
  • Aminin, D.L.
  • Kozlovskaya, E.P.

Abstract
    The HMIQ3c1 recombinant peptide (6434 Da), the Kunitz-type protease inhibitor, which belonged to the new group of the IQ-peptides from the Heteractis magnifica sea anemone was prepared. The inhibitory constant of trypsin by this peptide proved to be 5.0 × 10–8 M. rHMIQ3c1 was shown to have no interaction with eight isoforms of Kv1 channels. This peptide exhibited neuroprotective activity in a concentration of 10 μM, and the peptide increased the viability of cells of the Neuro2a murine neuroblastoma by 39.4 ± 6.6% in the presence of β-amyloid. However, the peptide did not influence the viability of the cells during their incubation with 6-hydroxydofamine.

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