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通过隧道电流对单个分离的微管蛋白自组装进行实时可视化:微管自发生长过程中电磁泵浦的影响。

Live visualizations of single isolated tubulin protein self-assembly via tunneling current: effect of electromagnetic pumping during spontaneous growth of microtubule.

作者信息

Sahu Satyajit, Ghosh Subrata, Fujita Daisuke, Bandyopadhyay Anirban

机构信息

1] National Institute for Materials Science (NIMS), Nano Characterization Unit, Advanced Key Technologies Division, 1-2-1 Sengen, Tsukuba, Japan [2] Indian Institute of Technology (IIT) Rajasthan, Bio-inspired System Science, Jodhpur, India, 342011.

National Institute for Materials Science (NIMS), Nano Characterization Unit, Advanced Key Technologies Division, 1-2-1 Sengen, Tsukuba, Japan.

出版信息

Sci Rep. 2014 Dec 3;4:7303. doi: 10.1038/srep07303.

DOI:10.1038/srep07303
PMID:25466883
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4252892/
Abstract

As we bring tubulin protein molecules one by one into the vicinity, they self-assemble and entire event we capture live via quantum tunneling. We observe how these molecules form a linear chain and then chains self-assemble into 2D sheet, an essential for microtubule, --fundamental nano-tube in a cellular life form. Even without using GTP, or any chemical reaction, but applying particular ac signal using specially designed antenna around atomic sharp tip we could carry out the self-assembly, however, if there is no electromagnetic pumping, no self-assembly is observed. In order to verify this atomic scale observation, we have built an artificial cell-like environment with nano-scale engineering and repeated spontaneous growth of tubulin protein to its complex with and without electromagnetic signal. We used 64 combinations of plant, animal and fungi tubulins and several doping molecules used as drug, and repeatedly observed that the long reported common frequency region where protein folds mechanically and its structures vibrate electromagnetically. Under pumping, the growth process exhibits a unique organized behavior unprecedented otherwise. Thus, "common frequency point" is proposed as a tool to regulate protein complex related diseases in the future.

摘要

当我们将微管蛋白分子一个一个地带到附近时,它们会自我组装,并且我们通过量子隧穿实时捕捉整个过程。我们观察到这些分子如何形成线性链,然后这些链自我组装成二维片层,这是微管的重要组成部分,微管是细胞生命形式中的基本纳米管。即使不使用鸟苷三磷酸(GTP)或任何化学反应,而是使用围绕原子尖的特殊设计天线施加特定的交流信号,我们也可以进行自我组装,然而,如果没有电磁泵浦,则观察不到自我组装现象。为了验证这一原子尺度的观察结果,我们通过纳米尺度工程构建了一个类似人工细胞的环境,并在有和没有电磁信号的情况下重复观察微管蛋白自发生长成其复合物的过程。我们使用了植物、动物和真菌微管蛋白的64种组合以及几种用作药物的掺杂分子,并反复观察到长期以来报道的蛋白质机械折叠及其结构电磁振动的共同频率区域。在泵浦作用下,生长过程呈现出一种独特的、否则前所未有的有组织行为。因此,“共同频率点”被提议作为未来调节与蛋白质复合物相关疾病的一种工具。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/38b6a1592f6e/srep07303-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/36dd387ee161/srep07303-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/0202be223ddd/srep07303-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/68349a00fca9/srep07303-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/c458f1e7f2b0/srep07303-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/38b6a1592f6e/srep07303-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/36dd387ee161/srep07303-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/0202be223ddd/srep07303-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/68349a00fca9/srep07303-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/c458f1e7f2b0/srep07303-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bf83/4252892/38b6a1592f6e/srep07303-f5.jpg

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