title: Structure and evolution of CyI cytoplasmic actin-encoding genes in the indirect- and direct-developing sea urchins Heliocidaris tuberculata and Heliocidaris erythrogramma.
abstract: The CyI cytoplasmic actin-encoding genes of Heliocidaris erythrogramma (He), a direct-developing sea urchin, and H. tuberculata, an indirect developer, were isolated and compared to the homologous CyI gene of another indirect developer, Strongylocentrotus purpuratus. Comparisons show that despite the differences in development, the actin gene structures and sequences are highly similar. The coding and 3' untranslated regions are conserved. The 5' He regulatory region has an inserted repeat element, but is otherwise similar to its homologues in the arrangement of presumptive transcription control elements.
authors.affiliation: Department of Biology, Indiana University, Bloomington 47405.
authors.forename: J H
authors.initials: JH
authors.lastname: Hahn
authors.forename: J C
authors.initials: JC
authors.lastname: Kissinger
authors.forename: R A
authors.initials: RA
authors.lastname: Raff
mesh_terms: D000199:Actins / Q000737:chemistry / Q000235:genetics*; D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D003001:Cloning, Molecular; D017124:Conserved Sequence / Q000235:genetics; D018507:Gene Expression Regulation, Developmental; D005796:Genes / Q000235:genetics; D008969:Molecular Sequence Data; D012045:Regulatory Sequences, Nucleic Acid / Q000235:genetics*; D012091:Repetitive Sequences, Nucleic Acid / Q000235:genetics; D012617:Sea Urchins / Q000235:genetics*; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid
chemical_list: D000199:Actins