A highly conserved, inhibitable astacin metalloprotease from Teladorsagia circumcincta is required for cuticle formation and nematode development

Stepek, G., McCormack, G., Winter, A. D. and Page, A. P. (2015) A highly conserved, inhibitable astacin metalloprotease from Teladorsagia circumcincta is required for cuticle formation and nematode development. International Journal for Parasitology, 45(3), pp. 345-355. (doi: 10.1016/j.ijpara.2015.01.004) (PMID:25736599) (PMCID:PMC4406453)

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Parasitic nematodes cause chronic, debilitating infections in both livestock and humans worldwide, and many have developed multiple resistance to the currently available anthelmintics. The protective collagenous cuticle of these parasites is required for nematode survival and its synthesis has been studied extensively in the free-living nematode, Caenorhabditis elegans. The collagen synthesis pathway is a complex, multi-step process involving numerous key enzymes, including the astacin metalloproteases. Nematode astacinsare crucial for C. elegans development, having specific roles in hatching, moulting and cuticle synthesis. NAS-35 (also called DPY-31), is a homologue of a vertebrate procollagen C-proteinase and performs a central role in cuticle formation of C. elegans as its mutation causes temperature-sensitive lethality and cuticle defects. The characterisation of DPY-31 from the ovine gastrointestinal nematode Teladorsagia circumcincta and its ability to rescue the C. elegans mutant is described. Compounds with a hydroxamate functional group have previously been shown to be potent inhibitors of procollagen C-proteinases and were therefore examined for inhibitory activity against the T. circumcincta enzyme. Phenotypic screening against T. circumcincta, Haemonchus contortus and C. elegans larval stages identified compounds that caused body morphology phenotypes consistent with the inhibition of proteases involved in cuticle collagen synthesis. These compounds correspondingly inhibited the activity of recombinant T. circumcincta DPY-31, supporting the hypothesis that this enzyme may represent a potentially novel anthelminthic drug target.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Stepek, Dr Gillian and Winter, Dr Alan and McCormack, Ms Gillian and Page, Professor Tony
Authors: Stepek, G., McCormack, G., Winter, A. D., and Page, A. P.
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:International Journal for Parasitology
ISSN (Online):1879-0135
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in International Journal for Parasitology 45(3):345-355
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
543261The matrix associated astacin enzymes; novel targets in the control of key GI nematodes of ruminants.Antony PageBiotechnology and Biological Sciences Research Council (BBSRC)BB/I011218/1III - PARASITOLOGY