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Characterization of a novel nm23 gene and its potential roles in gametogenesis in the prawn Macrobrachium rosenbergii (de Man, 1879) (Crustacea: Decapoda)

文献类型： 外文期刊

作者： Song, Ya-Nan 1 ; Lu, Cui-Yun 1 ; Chen, Jie 1 ; Qiu, Gao-Feng 1 ;

作者机构： 1.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Minist Educ, Key Lab Explorat & Utilizat Aquat Genet Resources, Shanghai 201306, Peoples R China

2.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Harbin 150070, Peoples R China

关键词： Macrobrachium rosenbergii;Nm23;Oogenesis;Spermatogenesis

期刊名称：GENE （ 影响因子：3.688； 五年影响因子：3.329 ）

ISSN：

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收录情况： SCI

摘要： Nm23 is a family of genes encoding the nucleoside diphosphate (NDP) kinase, which functions in a wide variety of biological processes, including growth, development, differentiation and tumor metastasis. In this study, a novel nm23 gene, designated as Mrnm23, was identified from the freshwater giant prawn Macrobrachium rosenbergii. The full-length cDNA was 776bp in length, encoding for a protein of 176 amino acids with one typical NDP kinase domain that harbored all the crucial residues for nucleotide binding and enzymatic activity. Like human novel nm23-H1B, the putative protein contained a unique 21-amino-acid NH2-terminal extension as compared to human nm23 (nm23-H1) homologs. Further, 3 extra amino acid residues prolonged the COOH-terminus. The Mrnm23 was ubiquitously expressed in all tissues examined, including androgenic gland, gill, heart, liver, muscle, ovary, and testis. In situ hybridization to gonad sections indicated that the Mrnm23 mRNA was localized in the cytoplasm of cup-base of differentiating spermatids, in the spike of the umbrella-shaped spermatozoa and in the cytoplasm of the early previtellogenic oocytes, suggesting that the Mrnm23 has potential roles in spermiogenesis and early differentiation of oocyte.

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