A molecular trap inside microtubules probes luminal access by soluble proteins.
A molecular trap inside microtubules probes luminal access by soluble proteins.
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DOI:
10.1038/s41589-021-00791-w
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发表时间:
2021-08
影响因子:
14.8
通讯作者:
Inoue T
中科院分区:
文献类型:
--
作者:
Nihongaki Y;Matsubayashi HT;Inoue T
The uniquely hollow structure of microtubules (MTs) confers characteristic mechanical and biological properties. While most regulatory processes take place at the outer surface, molecular events inside MTs such as α-tubulin acetylation also play a critical role. However, how regulatory proteins reach the site of action remains obscure. To assess luminal accessibility, we first identified luminally-positioned residues of β-tubulin that can be fused to a protein of interest. We then developed a chemically-inducible technique with which cytosolic proteins can be rapidly trapped at the lumen of intact MTs in cells. The luminal trapping assay revealed that soluble proteins of moderate size can enter the lumen via diffusion through openings at the MT ends and sides. Additionally, proteins forming a complex with tubulins can be incorporated to the lumen through the plus ends. Our approach may not only illuminate this understudied territory but also help understand its roles in MT-mediated functions.
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影响因子:
64.8
作者:
Hubbert, C;Guardiola, A;Yao, TP
通讯作者:
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影响因子:
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作者:
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作者:
Ghossoub, Rania;Hu, Qicong;Benmerah, Alexandre
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Alushin GM;Lander GC;Kellogg EH;Zhang R;Baker D;Nogales E
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DOI:
10.1073/pnas.1605397113
发表时间:
2016-11-15
影响因子:
11.1
作者:
Coombes, Courtney;Yamamoto, Ami;Gardner, Melissa K.
通讯作者:
Gardner, Melissa K.