Profiling Sex-Specific piRNAs in Zebrafish

Profiling Sex-Specific piRNAs in Zebrafish
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斑马鱼性别特异性 piRNA 分析

DOI:
10.1534/genetics.110.122234
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发表时间:
2010-12
期刊:
影响因子:
3.3
通讯作者:
--
中科院分区:
生物学2区
文献类型:
--
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Piwi蛋白及其伴侣小RNA在生育力、生殖系干细胞发育以及动物基因组的基本控制和进化中起着至关重要的作用。然而,关于皮尔纳生物发生的知识很少。利用微流控芯片分析,我们提出了一个定量的斑马鱼piRNA表达差异睾丸和卵巢。性别特异性piRNA来源于基因组中重复元件的单独基因座。卵巢piRNA可以被分类为多达92个成员的组,表明皮尔纳基因在基因组中的性别特异性排列。此外,前体piRNA优先在3 '端形成发夹结构,这似乎有利于成熟性别特异性piRNA的产生。此外,来自睾丸和卵巢的成熟piRNA在其3′端被2′-O-甲基化。
Piwi proteins and their partner small RNAs play an essential role in fertility, germ-line stem cell development, and the basic control and evolution of animal genomes. However, little knowledge exists regarding piRNA biogenesis. Utilizing microfluidic chip analysis, we present a quantitative profile of zebrafish piRNAs expressed differentially between testis and ovary. The sex-specific piRNAs are derived from separate loci of repeat elements in the genome. Ovarian piRNAs can be categorized into groups that reach up to 92 members, indicating a sex-specific arrangement of piRNA genes in the genome. Furthermore, precursor piRNAs preferentially form a hairpin structure at the 3′end, which seem to favor the generation of mature sex-specific piRNAs. In addition, the mature piRNAs from both the testis and the ovary are 2′-O-methylated at their 3′ ends.
DOI: 10.1007/s004380050675
发表时间: 1998-03
期刊: Molecular and General Genetics MGG
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