title: Insights into SCP/TAPS proteins of liver flukes based on large-scale bioinformatic analyses of sequence datasets.
abstract: BACKGROUND
  SCP/TAPS proteins of parasitic helminths have been proposed to play key roles in fundamental biological processes linked to the invasion of and establishment in their mammalian host animals, such as the transition from free-living to parasitic stages and the modulation of host immune responses. Despite the evidence that SCP/TAPS proteins of parasitic nematodes are involved in host-parasite interactions, there is a paucity of information on this protein family for parasitic trematodes of socio-economic importance.
  
  
  RESULTS
  We conducted the first large-scale study of SCP/TAPS proteins of a range of parasitic trematodes of both human and veterinary importance (including the liver flukes Clonorchis sinensis, Opisthorchis viverrini, Fasciola hepatica and F. gigantica as well as the blood flukes Schistosoma mansoni, S. japonicum and S. haematobium). We mined all current transcriptomic and/or genomic sequence datasets from public databases, predicted secondary structures of full-length protein sequences, undertook systematic phylogenetic analyses and investigated the differential transcription of SCP/TAPS genes in O. viverrini and F. hepatica, with an emphasis on those that are up-regulated in the developmental stages infecting the mammalian host.
  
  
  CONCLUSIONS
  This work, which sheds new light on SCP/TAPS proteins, guides future structural and functional explorations of key SCP/TAPS molecules associated with diseases caused by flatworms. Future fundamental investigations of these molecules in parasites and the integration of structural and functional data could lead to new approaches for the control of parasitic diseases.
authors.affiliation: Department of Veterinary Science, The University of Melbourne, Parkville, Victoria, Australia.
authors.forename: Cinzia
authors.initials: C
authors.lastname: Cantacessi
authors.forename: Andreas
authors.initials: A
authors.lastname: Hofmann
authors.forename: Neil D
authors.initials: ND
authors.lastname: Young
authors.forename: Ursula
authors.initials: U
authors.lastname: Broder
authors.forename: Ross S
authors.initials: RS
authors.lastname: Hall
authors.forename: Alex
authors.initials: A
authors.lastname: Loukas
authors.forename: Robin B
authors.initials: RB
authors.lastname: Gasser
mesh_terms: D000465:Algorithms; D000656:Amoeba / Q000502:physiology*; D000818:Animals; D018920:Coculture Techniques; D004275:DNA, Ribosomal / Q000235:genetics*; D005210:Fasciola hepatica / Q000235:genetics*; D016678:Genome; D007107:Immune System; D008958:Models, Molecular; D008968:Molecular Conformation; D009891:Opisthorchis / Q000235:genetics; D010271:Parasites; D010802:Phylogeny; D017433:Protein Structure, Secondary; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D014158:Transcription, Genetic
chemical_list: D004275:DNA, Ribosomal