Nanoliter-scale protein crystallization and screening with a microfluidic droplet robot.

Nanoliter-scale protein crystallization and screening with a microfluidic droplet robot.
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使用微流控液滴机器人进行纳升级蛋白质结晶和筛选

DOI:
10.1038/srep05046
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发表时间:
2014-05-23
期刊:
影响因子:
4.6
通讯作者:
Fang Q
Fang Q
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zhu Y;Zhu LN;Guo R;Cui HJ;Ye S;Fang Q

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在当前的结构生物学研究中,迫切需要在低样品消耗的情况下大规模筛选数百甚至数千种结晶条件。在这里,我们描述了一个全自动的液滴机器人的纳升级结晶筛选,结合了自动化机器人技术的蛋白质结晶筛选和液滴为基础的微流体技术的优势。为了实现纳米级蛋白质结晶实验中灵活、可编程和可靠的液体处理操作,开发了一种半接触式点胶方法。我们应用液滴机器人对5种可溶性蛋白和1种膜蛋白进行了大规模的35-96种不同结晶条件的筛选,研究了体积效应对蛋白结晶的影响,并测定了2种蛋白的相图。每个液滴反应器的体积仅为ca。4-8 nL。 与目前的结晶站相比,蛋白质消耗量显著减少50-500倍。
Large-scale screening of hundreds or even thousands of crystallization conditions while with low sample consumption is in urgent need, in current structural biology research. Here we describe a fully-automated droplet robot for nanoliter-scale crystallization screening that combines the advantages of both automated robotics technique for protein crystallization screening and the droplet-based microfluidic technique. A semi-contact dispensing method was developed to achieve flexible, programmable and reliable liquid-handling operations for nanoliter-scale protein crystallization experiments. We applied the droplet robot in large-scale screening of crystallization conditions of five soluble proteins and one membrane protein with 35–96 different crystallization conditions, study of volume effects on protein crystallization and determination of phase diagrams of two proteins. The volume for each droplet reactor is onlyca. 4–8 nL. The protein consumption significantly reduces 50–500 fold compared with current crystallization stations.
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