Publikationsdatum:
2016-02-11
Beschreibung:
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, 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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Tong -- Liang, Liang -- Xue, Yong -- Jia, Peng-Fei -- Chen, Wei -- Zhang, Meng-Xia -- Wang, Ying-Chun -- Li, Hong-Ju -- Yang, Wei-Cai -- England -- Nature. 2016 Mar 10;531(7593):241-4. doi: 10.1038/nature16975. Epub 2016 Feb 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉State Key Laboratory of Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China. ; University of Chinese Academy of Sciences, Beijing 100049, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26863186" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Arabidopsis/genetics/*metabolism/physiology
;
Arabidopsis Proteins/chemistry/genetics/*metabolism
;
Capsella/genetics/metabolism/physiology
;
Cell Membrane/metabolism
;
Mutation
;
Ovule/metabolism
;
Phenotype
;
Phosphotransferases/chemistry/genetics/*metabolism
;
Pollen Tube/genetics/growth & development/metabolism
;
Protein Kinases/genetics/metabolism
;
Protein Multimerization
;
Protein Structure, Quaternary
;
Protein Structure, Tertiary
;
Receptors, Cell Surface/chemistry/genetics/*metabolism
;
Reproduction
;
*Signal Transduction
Print ISSN:
0028-0836
Digitale ISSN:
1476-4687
Thema:
Biologie
,
Chemie und Pharmazie
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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