Interactions in the pollen-specific receptor-like kinases-containing signaling network.

Interactions in the pollen-specific receptor-like kinases-containing signaling network.
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包含花粉特异性受体样激酶的信号网络中的相互作用

DOI:
10.1016/j.ejcb.2010.08.002
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发表时间:
2010
影响因子:
6.6
通讯作者:
Berken
Berken
中科院分区:
生物学3区
文献类型:
--
作者:
Loecke;Fricke;Humpert;Berken

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番茄花粉特异受体类蛋白(PRKs)LePRK1和LePRK2被认为参与了花粉萌发和花粉管生长的调控。它们似乎是多聚体复合体的一部分,在该复合体中,跨膜LePRK可能在通过质膜传递外源信号方面具有关键地位。在这里,我们专注于涉及LePRK的细胞外和细胞内相互作用。在酵母双杂交实验中,我们发现了可能的PRK配体的交叉相互作用,LePRK2的寡聚,以及LePRKs与植物激活的Rho蛋白(ROP)的直接接触。此外,我们观察到花粉特异的RopGEF催化ROP激活并可能受PRK相互作用调节,在体外是活跃的,而在体内似乎发生了自抑制。我们认为,RopGEF作为PRK信号转导中的一个检查点的激活是一个更复杂的事件,包括Planta中的更多成分。我们的发现指出了PRK介导的信号转导的一些新方面,暗示了具有不同信号活性的LePRK2复合体,并进一步通过激活的ROP直接控制LePRKs。
The pollen-specific receptor-like kinases (PRKs) from Solanum lycopersicum, LePRK1 and LePRK2, are believed to be involved in the regulation of pollen germination and pollen tube growth. They appear to be part of a multimeric complex in which the transmembranic LePRKs presumably have a key position in transducing exogenous signals through the plasma membrane. Here, we focused on extra- and intracellular interactions involving the LePRKs. We show in yeast two-hybrid experiments a cross-interaction of putative PRK-ligands, the oligomerization of LePRK2 and a direct contact of LePRKs to activated Rho proteins of plants (ROPs). Moreover, we observed that pollen-specific RopGEFs, which catalyze ROP activation and may be regulated by PRK interaction, are active in vitro while autoinhibition seems to occur in vivo. We suggest that activation of RopGEFs as a checkpoint in PRK signal transduction is a more complex event including further components in planta. Our findings point to some new aspects in PRK-mediated signal transduction implying a LePRK2 complex with different signaling activity and a further direct control of LePRKs by activated ROP.
DOI: 10.1016/j.molcel.2006.11.023
发表时间: 2007-01
期刊: Molecular cell
影响因子: 16
作者:
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通讯作者: Christoph Thomas;Inka Fricke;A. Scrima;A. Berken;A. Wittinghofer
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影响因子: 3.7
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DOI: 10.1104/pp.118.2.407
发表时间: 1998-10-01
期刊: PLANT PHYSIOLOGY
影响因子: 7.4
作者:
Li, H;Wu, G;Yang, ZB
通讯作者: Yang, ZB
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DOI: 10.1104/pp.108.124420
发表时间: 2008-11-01
期刊: PLANT PHYSIOLOGY
影响因子: 7.4
作者:
Zhang, Dong;Wengier, Diego;Tang, Wei-Hua
通讯作者: Tang, Wei-Hua
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DOI: 10.1038/emboj.2008.226
发表时间: 2008-12-03
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
Komander, David;Garg, Ritu;Wan, Paul T. C.;Ridley, Anne J.;Barford, David
通讯作者: Barford, David