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@proceedings{1356002,
author = {Jedličková, Lucie and Dvořáková, Hana and Kašný, Martin and Vorel, Jiří and Ilgová, Jana and Brož, Peter and Mikeš, Libor},
booktitle = {Europian Multicolloquium On Parasitology},
keywords = {Eudiplozoon nipponicum; Monogenea; Proteolysis; Digestion},
language = {eng},
title = {Proteolytic equipment of the blood-feeding monogenean Eudiplozoon nipponicum},
year = {2016}
}
TY - CONF
ID - 1356002
AU - Jedličková, Lucie - Dvořáková, Hana - Kašný, Martin - Vorel, Jiří - Ilgová, Jana - Brož, Peter - Mikeš, Libor
PY - 2016
TI - Proteolytic equipment of the blood-feeding monogenean Eudiplozoon nipponicum
KW - Eudiplozoon nipponicum
KW - Monogenea
KW - Proteolysis
KW - Digestion
N2 - Members of the family Diplozoidae are blood-feeding monogeneans mainly parasitizing on the gills of cyprinid fishes. They may have pathogenic effects on their hosts caused by mechanical damage of gill filaments accompanied by secondary infections, or by induction of hypochromic mycrocytic anemia. The information about blood processing mechanisms in monogeneans of the subclass Heteronchoinea (Polyopisthocotylea) stems from ultrastructural or histochemical analyses. It has been assumed that digestion is intracellular and takes place in a specialized type of gut cells. Only little information exists about the biochemistry of digestion. Therefore we focused on biochemical and molecular characterization of peptidases which can be involved in digestion of blood proteins. The presence of the cysteine class of peptidases, mainly cathepsin L, was approved in samples of excretory/secretory products and in soluble protein extracts from adult Paradiplozoon bliccae and Eudiplozoon nipponicum by using fluorogenic substrates, specific inhibitors and a biotinylated/fluorochrome-labelled affinity probe DCG-04. In the gels after electrophoresis or on blots we observed labelled bands of 35 kDa in the case of both species and 24 kDa for E. nipponicum only. Soluble protein extracts of worms were separated by 2D electrophoresis; detected spots around 35 kDa for P. bliccae and around 35-25 kDa for E. nipponicum were identified by mass spectrometry analyses as cathepsins L. On the basis of transcriptome analyses we have predicted 30 peptidase genes in E. nipponicum, 9 of which may be involved in nutrient digestion. Cathepsin L and cathepsin B of E. nipponicum have been expressed in Pichia pastoris yeast and are being biochemically characterized.
ER -
JEDLIČKOVÁ, Lucie, Hana DVOŘÁKOVÁ, Martin KAŠNÝ, Jiří VOREL, Jana ILGOVÁ, Peter BROŽ a Libor MIKEŠ. Proteolytic equipment of the blood-feeding monogenean Eudiplozoon nipponicum. In \textit{Europian Multicolloquium On Parasitology}. 2016.
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