Počet záznamů: 1

The crystal structures of two salivary cystatins from the tick Ixodes scapularis and the effect of these inhibitors on the establishment of Borrelia burgdorferi infection in a murine model

  1. 1.
    0345737 - BC-A 2011 RIV GB eng J - Článek v odborném periodiku
    Kotsyfakis, Michalis - Horká, Helena - Salát, Jiří - Andersen, J. F.
    The crystal structures of two salivary cystatins from the tick Ixodes scapularis and the effect of these inhibitors on the establishment of Borrelia burgdorferi infection in a murine model.
    Molecular Microbiology. Roč. 77, č. 2 (2010), s. 456-470 ISSN 0950-382X
    Grant CEP: GA AV ČR KJB500960702; GA AV ČR IAA600960811
    Výzkumný záměr: CEZ:AV0Z60220518
    Klíčová slova: INVARIANT CHAIN FRAGMENT * EGG-WHITE CYSTATIN * CATHEPSIN-L * CYSTEINE PROTEINASES * SIALOSTATIN-L * ENDOPEPTIDASE
    Kód oboru RIV: EC - Imunologie
    Impakt faktor: 4.819, rok: 2010

    We have previously demonstrated that two salivary cysteine protease inhibitors from the Borrelia burgdorferi (Lyme disease) vector Ixodes scapularis play an important role in tick biology. Here we show that sialostatin L2 - but not sialostatin L - facilitates the growth of B. burgdorferi in murine skin. To examine the structural basis underlying these differential effects of the two sialostatins, we have determined the crystal structures of both sialostatin L and L2. This is the first structural analysis of cystatins from an invertebrate source. Sialostatin L2 crystallizes as a monomer with an 'unusual' conformation of the N-terminus, while sialostatin L crystallizes as a domain-swapped dimer with an N-terminal conformation similar to other cystatins. Deletion of the 'unusual' N-terminal five residues of sialostatin L2 results in marked changes in its selectivity, suggesting that this region is a particularly important determinant of the biochemical activity of sialostatin L2.
    Trvalý link: http://hdl.handle.net/11104/0186940