title: Effects of cyclin A2 noncoding regions on reporter gene translation during early development of Xenopus laevis.
abstract: The repression of translation of Xenopus cyclin A2 transcripts during early development was examined by analyzing the effects of cyclin A2 noncoding regions using a CAT reporter system. On their own, the 5' and 3' UTRs (untranslated regions) were unable to inhibit reporter translation until approximately the time of the midblastula transition. Transcripts containing the 3' UTR were polyadenylated after fertilization and the midblastula transition. When both noncoding regions flanked a CAT reporter gene, translation was repressed at all stages of development examined in spite of their polyadenylation after fertilization. From these data, we conclude that the 5' and 3' UTRs interact synergically to prevent translation during early development and that the poly(A) tail is insufficient to promote their translation.
authors.affiliation: Department of Biological Sciences, University of Calgary, Alberta, Canada.
authors.forename: T D
authors.initials: TD
authors.lastname: Strugnell
authors.forename: L W
authors.initials: LW
authors.lastname: Browder
mesh_terms: D000818:Animals; D001483:Base Sequence; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics; D019925:Cyclin A / Q000235:genetics*; D018507:Gene Expression Regulation, Developmental / Q000235:genetics*; D017930:Genes, Reporter / Q000235:genetics; D008969:Molecular Sequence Data; D009865:Oocytes; D010063:Ovum; D014176:Protein Biosynthesis / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics; D011993:Recombinant Fusion Proteins; D012045:Regulatory Sequences, Nucleic Acid / Q000235:genetics*; D014982:Xenopus laevis; D015053:Zygote
chemical_list: C503725:CCNA2 protein, Xenopus; D019925:Cyclin A; D012333:RNA, Messenger; D011993:Recombinant Fusion Proteins; D015500:Chloramphenicol O-Acetyltransferase