
科学网—林海帆教授综述:PIWI蛋白和piRNA对基因表达的调控
2014年7月16日 · 综述详细涵盖了PIWI蛋白质在piRNA生物合成及PIWI-piRNA途径在发育过程中的调节基因表达机制。 PIWI蛋白在不同物种发育过程中不可缺少。 在线虫、果蝇、斑马鱼和小鼠中,PIWI基因突变引起生殖细胞发育缺陷,如无法维持生殖干细胞 (germline stem cells,GSCs),减数分裂异常,最后造成不育。 近来研究发现了许多PIWI相互作用蛋白,包括多个TUDOR蛋白家族成员,并揭示了PIWI相互作用蛋白突变导致类似于PIWI的突变表型。 更重要的是,PIWI蛋白 …
RCSB PDB - 7KX9: Cryo-EM structure of Ephydatia fluviatilis PiwiA …
2020年12月3日 · Here we present cryo-electron microscopy structures of a PIWI-piRNA complex from the sponge Ephydatia fluviatilis with and without target RNAs, and a biochemical analysis of target recognition. Mirroring Argonaute, PIWI identifies targets using the piRNA seed region.
Inheritance of a Nuclear PIWI from Pluripotent Stem Cells by …
2016年5月9日 · Differentiation of pluripotent stem cells (PSCs) requires transposon silencing throughout the process. PIWIs, best known as key factors in germline transposon silencing, are also known to act in somatic differentiation of planarian PSCs (neoblasts). However, how PIWIs control the latter process remains elusive.
Planarian PIWI-piRNA Interaction Analysis Using ... - PubMed
The freshwater planarian Dugesia japonica is a good in vivo model for studying the function of piwi genes in adult pluripotent stem cell (aPSC) due to their abundant aPSCs. Generally, PIWI family proteins encoded by piwi genes bind to small noncoding RNAs called piRNAs (PIWI-interacting piRNAs).
PIWI/piRNA在癌症中的功能和机制 - shu.edu.cn
摘要: PIWI蛋白是PAZ/PIWI结构域家族亚家族之一的RNA结合蛋白。 PIWI蛋白通常与称为“PIWI相互作用的小型非编码RNA” (piRNA)相结合形成功能复合体来发挥作用。 PIWI-piRNA通路因其在抑制转座子和生殖系发育方面的重要作用而闻名。 除了在生殖系中的卓越作用,PIWI蛋白也因其通常只在生殖细胞中表达而在正常体细胞组织中几乎不表达,但是PIWI...
SMEDWI-2 Is a PIWI-Like Protein That Regulates Planarian Stem …
2005年11月25日 · We have identified two genes, smedwi-1 and smedwi-2, expressed in the dividing adult stem cells (neoblasts) of the planarian Schmidtea mediterranea. Both genes encode proteins that belong to the Argonaute/PIWI protein family and that share highest homology with those proteins defined by Drosophila PIWI.
辜雪砚、林海帆共同综述:PIWI蛋白及piRNA对基因表达的调控
该综述详细涵盖了PIWI蛋白质在piRNA生物合成的作用,以及PIWI-piRNA途径在发育过程中的调节基因表达机制。 PIWI蛋白在不同物种发育过程中不可缺少。 在线虫、果蝇、斑马鱼和小鼠中,PIWI基因突变引起生殖细胞发育缺陷,如无法维持生殖干细胞 (germline stem cells,GSCs),减数分裂异常,最后造成不育。 许多PIWI相互作用蛋白,包括多个TUDOR蛋白家族成员,其基因突变导致类似于PIWI的突变表型。 更重要的是,PIWI蛋白和多数相互作用蛋白皆参与piRNA的 …
PIWI‑interacting RNA in cancer: Molecular mechanisms and …
PIWI‑interacting RNA is a class of non‑coding small RNA that is ~30 nt long and is primarily found in mammalian germ cells from mice and humans. In cooperation with the members of PIWI protein family, this macromolecule participates in germ cell development, inhibits DNA self‑-replication and maintains genomic stability.
暨南大学
微塑料作用下涡虫干细胞标记基因piwiA、piwiB和增殖相关基因PCNA表达受到抑制。 通过蛋白质组学测定,该研究还发现微塑料损伤干细胞可能依赖于Notch和TGFβ/SMAD信号通路,证明环境中广泛存在的微塑料对干细胞产生损伤,为探索微塑料与相关疾病的关联研究提供 ...
DjpiwiB in intact and X-ray-irradiated planarians. Scale bar, 500 µm. (B) In situ hybridization of DjpiwiB and immunostaining of DjPiwiA in head and pharyngeal region. Brain is indicated by arrowheads. *; eye. ph; pharynx. Scale bar, 50 µm. (C) In situ hybridization of DjpiwiB and immunostaining of DjPiwiB in head and pharyngeal region.