Connected function of PRAF/RLD and GNOM in membrane trafficking controls intrinsic cell polarity in plants.

Connected function of PRAF/RLD and GNOM in membrane trafficking controls intrinsic cell polarity in plants.
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PRAF/RLD 和 GNOM 在膜运输中的关联功能控制着植物的内在细胞极性

DOI:
10.1038/s41467-021-27748-w
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发表时间:
2022-01-10
影响因子:
16.6
通讯作者:
Dong J
Dong J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wang L;Li D;Yang K;Guo X;Bian C;Nishimura T;Le J;Morita MT;Bergmann DC;Dong J

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细胞极性是细胞形态发生和生物体发育的基本特征。在拟南芥气孔谱系中,极性蛋白BASL控制气孔细胞的不对称分裂。然而,这种内在极性位点建立的细胞机制仍然未知。在这里,我们确定PRAF/RLD蛋白作为BASL物理伙伴和突变fourPRAF成员导致BASL极化缺陷。PRAF蛋白的成员在气孔谱系细胞中以BASL依赖的方式极化。praf突变体的发育缺陷与gnom突变体的表型相似。GnOM是保守的Arf GTP酶的激活剂,在膜运输中起重要作用。我们进一步发现PRAF在体外和体内与GNOME发生物理相互作用。因此,我们认为BASL和PRAF在质膜上的正反馈以及PRAF和GNOME在内体运输中的连接功能建立了拟南芥气孔谱系的内在细胞极性。
Cell polarity is a fundamental feature underlying cell morphogenesis and organismal development. In theArabidopsisstomatal lineage, the polarity protein BASL controls stomatal asymmetric cell division. However, the cellular machinery by which this intrinsic polarity site is established remains unknown. Here, we identify the PRAF/RLD proteins as BASL physical partners and mutating fourPRAFmembers leads to defects in BASL polarization. Members of PRAF proteins are polarized in stomatal lineage cells in a BASL-dependent manner. Developmental defects of theprafmutants phenocopy those of thegnommutants. GNOM is an activator of the conserved Arf GTPases and plays important roles in membrane trafficking. We further find PRAF physically interacts with GNOM in vitro and in vivo. Thus, we propose that the positive feedback of BASL and PRAF at the plasma membrane and the connected function of PRAF and GNOM in endosomal trafficking establish intrinsic cell polarity in theArabidopsisstomatal lineage.
DOI: 10.1016/s0092-8674(03)00003-5
发表时间: 2003-01-24
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影响因子: 64.5
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BASL控制拟南芥中的不对称细胞分裂。
DOI: 10.1016/j.cell.2009.04.018
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