In situ structure of intestinal apical surface reveals nanobristles on microvilli.
In situ structure of intestinal apical surface reveals nanobristles on microvilli.
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肠顶端表面的原位结构揭示了微绒毛上的纳米刷毛
DOI:
10.1073/pnas.2122249119
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发表时间:
2022-06-14
影响因子:
11.1
通讯作者:
中科院分区:
文献类型:
--
作者:
Significance We study microvilli of Caenorhabditis elegans larvae and mouse intestinal tissues by combining high-pressure freezing, cryo-focused ion-beam milling, cryo-electron tomography, and subtomogram averaging. We find that many radial nanometer bristles, referred to as nanobristles, project from the lateral surface of nematode and mouse microvilli. The C. elegans nanobristles are 37.5 nm long. We show that nanobristle formation requires a protocadherin family protein, CDH-8, in C. elegans. The loss of nanobristles in cdh-8 mutants slows down animal growth and ectopically increases the number of Y-shaped microvilli, the putative intermediate structures if microvilli split from their tips. Our results reveal a potential role of nanobristles in separating microvilli and suggest that microvilli division may help generate nascent microvilli with uniformity.
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