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A receptor heteromer mediates the male perception of female attractants in plants

机译：受体异聚体介导植物中女性引诱剂的男性感知

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摘要

Sexual reproduction requires recognition between the male and female gametes. In flowering plants, the immobile sperms are delivered to the ovule-enclosed female gametophyte by guided pollen tube growth. Although the female gametophyte-secreted peptides have been identified to be the chemotactic attractant to the pollen tube(1-3), the male receptor(s) is still unknown. Here we identify a cell-surface receptor heteromer, MDIS1-MIK, on the pollen tube that perceives female attractant LURE1 in Arabidopsis thaliana. MDIS1, MIK1 and MIK2 are plasma-membrane-localized receptor-like kinases with extracellular leucine-rich repeats and an intracellular kinase domain. LURE1 specifically binds the extracellular domains of MDIS1, MIK1 and MIK2, whereas mdis1 and mik1 mik2 mutant pollen tubes respond less sensitively to LURE1. Furthermore, LURE1 triggers dimerization of the receptors and activates the kinase activity of MIK1. Importantly, transformation of AtMDIS1 to the sister species Capsella rubella can partially break down the reproductive isolation barrier. Our findings reveal a new mechanism of the male perception of the female attracting signals.
机译：有性生殖需要男性和女性配子之间的认同。在开花植物中，固定的精子通过引导的花粉管生长被递送到胚珠封闭的雌配子体。尽管已确定雌配子体分泌肽是花粉管的趋化引诱剂（1-3），但雄性受体仍然未知。在这里，我们在花粉管上识别了拟南芥中雌性引诱剂LURE1的细胞表面受体异源单体MDIS1-MIK。 MDIS1，MIK1和MIK2是具有丰富的细胞亮氨酸重复序列和细胞内激酶结构域的血浆膜定位受体样激酶。 LURE1特异结合MDIS1，MIK1和MIK2的胞外域，而mdis1和mik1 mik2突变体花粉管对LURE1的反应较不敏感。此外，LURE1触发受体的二聚化并激活MIK1的激酶活性。重要的是，将AtMDIS1转化为风疹Capsella姊妹物种可以部分打破生殖隔离屏障。我们的发现揭示了男性感知女性吸引信号的新机制。

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  • 来源
    《Nature》 |2016年第7593期|241-244|共4页
  • 作者

    Wang Tong; Liang Liang; Xue Yong; Jia Peng-Fei; Chen Wei; Zhang Meng-Xia; Wang Ying-Chun; Li Hong-Ju; Yang Wei-Cai;

  • 作者单位

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Genet & Dev Biol, State Key Lab Mol & Dev Biol, Beijing 100101, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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