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横向基因转移可以解释青和虫寄生虫之间的5SrDNA相似性吗?

Kaleb Pretto Gatto^1,2, Cintia Pelegrineti Targueta³, Stenio Eder Vittorazzi⁴

¹Laboratório de Estudos Cromossômicos, Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade Estadual de Campinas, Campinas 13083-863, São Paulo, Brazil.

|July 29, 2025

概括

在真核生物之间可能会发生水平基因转移 (HGT). 研究人员发现了从Xenopus青到它们的平虫寄生虫Protopolystoma xenopodis的5S核糖体DNA (rDNA) 的HGT证据.

科学领域:

分子生物学分子生物学
遗传学是一个遗传学.
进化生物学进化生物学

背景情况:

水平基因转移 (HGT) 在原核生物中很常见,但其在真核生物中的作用不明.
5S核糖体DNA (rDNA) 是核糖体的关键组成部分,在蛋白质合成中起着至关重要的作用.
了解真核生物中的HGT可以揭示基因组进化和生物多样性.

研究的目的:

调查潜在的跨系水平基因转移 (HGT) 事件,涉及5S核糖体DNA (rDNA).
为了确定从Xenopus laevis的5SrDNA序列是否可以转移到它的寄生虫Protopolystoma xenopodis.
探索HGT对真核生物中5SrDNA家族多样性的贡献.

主要方法:

用最大概率对基因树与物种树进行比较的家族遗传学分析.
对5S rDNA基因区域及其非转录的间隔器进行序列分歧分析.
对Protopolystoma xenopodis基因组组合的检查,检查是否可能受到青DNA的污染.

主要成果:

来自Protopolystoma xenopodis的5SrDNA序列与Xenopus laevis的5SrDNA具有很高的相似性.
遗传学分析显示,来自Pr.的5SrDNA序列. xenopodis与anuran序列聚集在一起,表明与物种树不一致.
序列差异分析支持从Xenopus到Pr.发生的HGT事件. xenopodis,没有证据表明基因组组装污染.

结论:

这项研究提供了强有力的证据,证明了从Xenopus青到它们的寄生虫平虫Protopolystoma xenopodis的5SrDNA的水平基因转移 (HGT).
这一发现表明,HGT可能在塑造真核生物基因组和推动遗传多样性方面发挥着比以前认可的更重要的作用.
结果突出了跨系基因转移的潜力及其对进化生物学的影响.

关键词:

阿努拉·阿努拉 (Anura Anura) 是一个尼马托达达 (Nematoda) 是一个无形的生物.在这些金中,金.侧向基因转移是横向的 rDNADNA 的意思是

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