title: Cloning and developmental expression of a novel, secreted frizzled-related protein from the sea urchin, Strongylocentrotus purpuratus.
abstract: Wnt proteins and their receptors, members of the frizzled protein family, play a key role in regulating a wide range of developmental processes. Recently, putative regulators of Wnt signaling known as secreted frizzled-related proteins (SFRPs) have been identified in several vertebrates. Here, we describe the cloning of a novel SFRP (suSFRP1) from the sea urchin, Strongylocentrotus purpuratus. SuSFRP1 contains a putative signal sequence, four cysteine-rich domains and a single Ig domain. The developmental expression of suSFRP1 mRNA is highly dynamic and can be separated into three phases: (1) abrupt accumulation in most or all cells of the embryo at the early blastula stage; (2) restriction of expression to the prospective endoderm and animal pole region of the gastrula; and (3) expression in prospective muscle cells of the coelomic pouches during late embryogenesis.
authors.affiliation: Department of Biological Sciences, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA.
authors.forename: Michele R
authors.initials: MR
authors.lastname: Illies
authors.forename: Margaret T
authors.initials: MT
authors.lastname: Peeler
authors.forename: Anna
authors.initials: A
authors.lastname: Dechtiaruk
authors.forename: Charles A
authors.initials: CA
authors.lastname: Ettensohn
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D002352:Carrier Proteins / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics*; D003545:Cysteine / Q000737:chemistry; D003593:Cytoplasm / Q000378:metabolism; D018076:DNA, Complementary / Q000378:metabolism; D004707:Endoderm / Q000378:metabolism; D015723:Gene Library; D017403:In Situ Hybridization; D008954:Models, Biological; D008957:Models, Genetic; D008969:Molecular Sequence Data; D017434:Protein Structure, Tertiary; D012333:RNA, Messenger / Q000378:metabolism; D011956:Receptors, Cell Surface / Q000235:genetics* / Q000378:metabolism; D012617:Sea Urchins; D017386:Sequence Homology, Amino Acid; D015398:Signal Transduction; D013997:Time Factors
chemical_list: D002352:Carrier Proteins; D018076:DNA, Complementary; D012333:RNA, Messenger; D011956:Receptors, Cell Surface; D003545:Cysteine