title: Molecular cloning and embryonic expression of zebrafish PCSK5 co-orthologues: functional assessment during lateral line development.
abstract: Pro-protein convertase subtilisin/kexin 5 (PC5, also known as PC6) is a member of the subtilisin-like superfamily of serine proteases implicated in the maturation of latent precursor proteins into their functionally active derivatives. To investigate the functional roles, we have cloned the cDNA sequences encoding two candidate zebrafish PC5 convertases (designated as PCSK5.1 and PCSK5.2) co-orthologous to the single PC5 encoding gene (PCSK5) found in mammals. Both display syntenic correspondence to the human PCSK5 gene. Overall gene architecture has been conserved across species. While PC5.1 mRNA expression is very discrete within the otic vesicle and lateral line neuromasts, PC5.2 transcripts are more ubiquitously expressed within the central nervous system together with specific localization in various organs including liver, intestine, and otic vesicle. Zebrafish PC5.1-deficient embryos display abnormal neuromast deposition within the lateral line system and lack a normal touch response, consistent with the known sensory role that the lateral line plays in spatial awareness and sensing the environment.
authors.affiliation: Endocrine Research Laboratory and Department of Medicine, Royal Victoria Hospital and McGill University Health Centre Research Institute, Montreal, Quebec, Canada. babykumari.chitramuthu@mail.mcgill.ca
authors.forename: Babykumari P
authors.initials: BP
authors.lastname: Chitramuthu
authors.forename: David C
authors.initials: DC
authors.lastname: Baranowski
authors.forename: Benoît
authors.initials: B
authors.lastname: Cadieux
authors.forename: Estelle
authors.initials: E
authors.lastname: Rousselet
authors.forename: Nabil G
authors.initials: NG
authors.lastname: Seidah
authors.forename: Hugh P J
authors.initials: HP
authors.lastname: Bennett
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015152:Blotting, Northern; D015153:Blotting, Western; D004625:Embryo, Nonmammalian / Q000378:metabolism; D006801:Humans; D017403:In Situ Hybridization; D051379:Mice; D008969:Molecular Sequence Data; D045702:Proprotein Convertase 5 / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid; D015027:Zebrafish; D029961:Zebrafish Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*
chemical_list: D029961:Zebrafish Proteins; D045702:Proprotein Convertase 5