Isolation of the cDNA and characterization of mRNA expression of ribosomal protein S19 from the soft-shell clam, Mya arenaria.

Isolation of the cDNA and characterization of mRNA expression of ribosomal protein S19 from the soft-shell clam, Mya arenaria.
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软壳蛤核糖体蛋白 S19 的 cDNA 分离和 mRNA 表达表征。

DOI:
10.1016/s0378-1119(97)00275-8
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发表时间:
1997
期刊:
影响因子:
3.5
通讯作者:
VanBeneden,RJ
VanBeneden,RJ
中科院分区:
生物学3区
文献类型:
--
作者:
Rhodes,LD;VanBeneden,RJ

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核糖体蛋白有助于核糖体的调节和活性,因此有助于细胞的翻译活性。核糖体蛋白质的异常表达与某些病理状况如肿瘤有关。我们已经分离和表征的核糖体蛋白(RP)S19从海洋双壳类,软壳蛤(Mya arenaria)的cDNA,我们已经研究了其在卵巢和睾丸中的mRNA表达模式。S19cDNA含有一个450 nt的开放阅读框(ORF),两侧分别有89 nt和26 nt的5′和3′非翻译区。从S19 cDNA合成的探针识别四种不同组织中约550 nt的单个转录物。从ORF预测的氨基酸序列与人和大鼠S19具有58%的同一性。基因组DNA的Southern分析表明,M. arenaria可能有多个拷贝的S19,这是一个更类似于脊椎动物而不是无脊椎动物rp基因的特征。在整个配子发生过程中,卵巢和精巢中S19 mRNA的表达均升高,直到产卵后,观察到S19信使减少。S19 mRNA水平在产卵后的动物的比较显示,在卵巢和睾丸的性腺肿瘤的影响,表明S19可能是一个有用的分子标志物的病理条件的表达升高的趋势。
Ribosomal proteins contribute to the regulation and activity of ribosomes, and hence, the translational activity of the cell. Aberrant expression of ribosomal proteins has been linked to certain pathological conditions such as neoplasms. We have isolated and characterized a cDNA for the ribosomal protein (rp) S19 from a marine bivalve, the soft-shell clam (Mya arenaria), and we have examined its pattern of mRNA expression in the ovary and testis. The S19 cDNA contains a 450 nucleotide (nt) open reading frame (ORF), flanked by 89nt and 26nt of 5′ and 3′ untranslated regions, respectively. Probes synthesized from the S19 cDNA recognize a single transcript of approximately 550nt in four different tissues. The predicted amino acid sequence from the ORF exhibits 58% identity with human and rat S19. Southern analysis of genomic DNA suggests that M. arenaria may have multiple copies of S19, a feature that is more similar to vertebrate than invertebrate rp genes. Expression of S19 mRNA in both ovary and testis was elevated throughout gametogenesis until after spawning, when a decrease in S19 message was observed. A comparison of S19 mRNA levels in post-spawn animals revealed a trend of elevated expression in ovaries and testes affected by a gonadal neoplasm, indicating that S19 may be a useful molecular marker for the pathological condition.
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