title: Expression and regulation of mouse SERDIN1, a highly conserved cardiac-specific leucine-rich repeat protein.
abstract: Despite recent progress, the precise mechanisms responsible for vertebrate cardiac development are still enigmatic. Better understanding of cardiac biology and disease necessitates identification and analysis of a full spectrum of regulatory and structural proteins specific to the developing heart. By performing an in silico screen, we identified a cardiac-specific gene we named Serdin1. The Serdin1 gene is conserved, and the message is restricted to the heart in several vertebrate species, thus implicating Serdin1 as an important gene in cardiac development. In situ hybridization confirmed that the Serdin1 message is cardiac-specific in mice as early as embryonic day 8.5. Antibody staining demonstrated predominantly nuclear staining in immortalized cardiac cell lines (P19 and HL-1) and proliferating cultured cardiomyocytes, whereas in vivo SERDIN1 localizes to I bands of the sarcomere. Seven kilobases of the upstream regulatory sequence of Serdin1 is sufficient for cardiac-specific expression. Computer analysis revealed an 80-bp homologous region between the mouse and the human Serdin genes that contains GATA, SRF, and MEF sites. Cardiac specificity and localization patterns suggest that SERDIN1 is intimately integrated with the molecular pathways controlling cardiogenesis in vertebrates.
authors.affiliation: Department of Genetics, Dartmouth Medical School, Hanover, New Hampshire 03755, USA.
authors.forename: Igor I
authors.initials: II
authors.lastname: Adameyko
authors.forename: Ryan E
authors.initials: RE
authors.lastname: Mudry
authors.forename: Nga Rewa M
authors.initials: NR
authors.lastname: Houston-Cummings
authors.forename: Alexander P
authors.initials: AP
authors.lastname: Veselov
authors.forename: Carol C
authors.initials: CC
authors.lastname: Gregorio
authors.forename: Sergei G
authors.initials: SG
authors.lastname: Tevosian
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000906:Antibodies / Q000276:immunology; D002478:Cells, Cultured; D019295:Computational Biology; D017124:Conserved Sequence; D018507:Gene Expression Regulation, Developmental; D006321:Heart / Q000196:embryology / Q000254:growth & development; D006801:Humans; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D051379:Mice; D008822:Mice, Transgenic; D008969:Molecular Sequence Data; D009124:Muscle Proteins / Q000737:chemistry / Q000235:genetics* / Q000276:immunology / Q000378:metabolism*; D009206:Myocardium / Q000378:metabolism*; D009928:Organ Specificity; D012313:RNA / Q000235:genetics / Q000378:metabolism; D016415:Sequence Alignment
chemical_list: D000906:Antibodies; D009124:Muscle Proteins; C482740:heart-restricted leucine-rich repeat protein, mouse; D012313:RNA