Multiple C2 domains and Transmembrane region Proteins (MCTPs) tether membranes at plasmodesmata
Multiple C2 domains and Transmembrane region Proteins (MCTPs) tether membranes at plasmodesmata
复制标题
胞间连丝的多个 C2 结构域和跨膜区蛋白 (MCTP) 束缚膜
DOI:
10.1101/423905
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Brault M
中科院分区:
文献类型:
--
作者:
Brault M
In eukaryotes, membrane contact sites (MCS) allow direct communication between organelles. Plants have evolved a unique type of MCS, inside intercellular pores, the plasmodesmata, where endoplasmic reticulum (ER)–plasma membrane (PM) contacts coincide with regulation of cell‐to‐cell signalling. The molecular mechanism and function of membrane tethering within plasmodesmata remain unknown. Here, we show that the multiple C2 domains and transmembrane region protein (MCTP) family, key regulators of cell‐to‐cell signalling in plants, act as ER‐PM tethers specifically at plasmodesmata. We report that MCTPs are plasmodesmata proteins that insert into the ER via their transmembrane region while their C2 domains dock to the PM through interaction with anionic phospholipids. AAtmctp3/Atmctp4loss of function mutant induces plant developmental defects, impaired plasmodesmata function and composition, while MCTP4 expression in a yeast Δtether mutant partially restores ER‐PM tethering. Our data suggest that MCTPs are unique membrane tethers controlling both ER‐PM contacts and cell‐to‐cell signalling.
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DOI:
10.1016/j.bbalip.2015.12.003
发表时间:
2016-08
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Reinisch KM;De Camilli P
通讯作者:
De Camilli P
影响因子:
9.2
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影响因子:
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通讯作者:
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DOI:
10.1073/pnas.1406446111
发表时间:
2014-10-07
影响因子:
11.1
作者:
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通讯作者:
Lohmann, Jan U.
影响因子:
9.5
作者:
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通讯作者:
Lee JY