title: Identification of a putative oocyte-specific small nuclear ribonucleoprotein polypeptide C in gibel carp.
abstract: Previous studies have demonstrated that germinal vesicle of amphibian oocyte contains small nuclear ribonucleoprotein polypeptide C (SNRPC). In this study, a putative member of SNRPC was identified from Carassius auratus gibelio oocyte cDNA library. Its full-length cDNA has an open reading frame of 201 nt for encoding a peptide of 66 aa, a short 5'-UTR of 19 nt and a long 3'-UTR of 347 nt including a polyadenylation signal and poly- (A) tail, and the deduced amino acid sequence has 47% identity with the C-terminal of the zebrafish small nuclear ribonucleoprotein polypeptide C. Western blot analysis revealed its oocyte-specific expression. Immunofluorescence localization indicated that its gene product localized to numerous nucleoli within the oocytes and showed dynamic changes with the nucleoli during oocyte maturation. RT-PCR and Western blot analysis further revealed its constant presence in the oocytes and in the embryos until hatching. The data suggested that the newly identified CagOSNRPC might be a nucleolar protein.
authors.affiliation: State Key Laboratory of Freshwater Ecology and Biotechnology, Wuhan Center for Developmental Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Wuhan 430072, China.
authors.forename: Hong-Ying
authors.initials: HY
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.forename: Jian-Fang
authors.initials: JF
authors.lastname: Gui
mesh_terms: D020413:3' Untranslated Regions / Q000235:genetics; D000595:Amino Acid Sequence; D000818:Animals; D002347:Carps / Q000196:embryology / Q000235:genetics*; D002466:Cell Nucleolus / Q000235:genetics* / Q000378:metabolism; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D005260:Female; D029941:Fish Proteins / Q000235:genetics* / Q000378:metabolism; D015723:Gene Library; D008969:Molecular Sequence Data; D009865:Oocytes / Q000502:physiology*; D017411:Ribonucleoproteins, Small Nuclear / Q000235:genetics* / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D015027:Zebrafish / Q000196:embryology / Q000235:genetics; D015053:Zygote / Q000502:physiology*
chemical_list: D020413:3' Untranslated Regions; D018076:DNA, Complementary; D029941:Fish Proteins; D017411:Ribonucleoproteins, Small Nuclear