title: cDNA cloning and expression of Ubc9 in the developing embryo and ovary of Oriental river prawn, Macrobrachium nipponense.
abstract: The small ubiquitin-like modifier (SUMO) pathway in eukaryotes is an essential biological process involving cellular processes, development and organelle biogenesis. In a sequential enzymatic action, Ubc9 is an important conjunction enzyme in the SUMO pathway. Although the Ubc9 has been found in vertebrates, its expression in crustaceans is little known. In this study, the Ubc9 was identified in the embryo and ovary of a freshwater prawn Macrobrachium nipponense for the first time and it was denoted as MnUbc9. Bioinformatics analyses showed that this gene encodes a protein of 161 amino acids with predicted molecular mass of 18.32kDa. Real-time quantitative PCR analyses demonstrated that the expression levels varied significantly in the developing embryo and ovary. In the embryo, the expression level of MnUbc9 was higher at the cleavage stage (CS) than at the blastula stage (BS), and reached even higher levels at the protozoea stage (PS) and the zoea stage (ZS). In the ovary, the MuUbc9 expression was low at the early stage, but reached the highest at the yolk granule stage (YG), and then abruptly declined at the maturation stage (MA). The differential expressions of MnUbc9 in the embryo and ovary suggest that MnUbc9 may play an important role in embryogenesis and oogenesis of M. nipponense.
authors: College of Life Science, East China Normal University, Shanghai 200062, China; East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China.
authors: Fengying
authors: F
authors: Zhang
authors: Liqiao
authors: L
authors: Chen
authors: Ping
authors: P
authors: Wu
authors: Weihong
authors: W
authors: Zhao
authors: Erchao
authors: E
authors: Li
authors: Jianguang
authors: J
authors: Qin
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics*; D020224:Expressed Sequence Tags / Q000378:metabolism; D005260:Female; D018507:Gene Expression Regulation, Developmental; D006801:Humans; D008969:Molecular Sequence Data; D010053:Ovary / Q000254:growth & development* / Q000378:metabolism*; D033541:Palaemonidae / Q000196:embryology* / Q000235:genetics* / Q000254:growth & development; D010802:Phylogeny; D016415:Sequence Alignment; D044763:Ubiquitin-Conjugating Enzymes / Q000737:chemistry / Q000235:genetics*; D000098843:Ubiquitin-Conjugating Enzyme UBC9
chemical_list: D018076:DNA, Complementary; D044763:Ubiquitin-Conjugating Enzymes; D000098843:Ubiquitin-Conjugating Enzyme UBC9