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    • 3. 发明授权
    • Dynamically controlled crystal growth system
    • 动态控制晶体生长系统
    • US06406903B2
    • 2002-06-18
    • US09131729
    • 1998-08-10
    • Terry L. BrayLarry J. KimMichael HarringtonLawrence J. DeLucas
    • Terry L. BrayLarry J. KimMichael HarringtonLawrence J. DeLucas
    • C12N700
    • C12N9/2462C07K2299/00C30B7/00C30B29/58Y10S117/901Y10T117/1008
    • Crystal growth can be initiated and controlled by dynamically controlled vapor diffusion or temperature change. In one aspect, the present invention uses a precisely controlled vapor diffusion approach to monitor and control protein crystal growth. The system utilizes a humidity sensor and various interfaces under computer control to effect virtually any evaporation rate from a number of different growth solutions simultaneously by means of an evaporative gas flow. A static laser light scattering sensor can be used to detect aggregation events and trigger a change in the evaporation rate for a growth solution. A control/follower configuration can be used to actively monitor one chamber and accurately control replicate chambers relative to the control chamber. In a second aspect, the invention exploits the varying solubility of proteins versus temperature to control the growth of protein crystals. This system contains miniature thermoelectric devices under microcomputer control that change temperature as needed to grow crystals of a given protein. Complex temperature ramps are possible using this approach. A static laser light scattering probe also can be used in this system as a non-invasive probe for detection of aggregation events. The automated dynamic control system provides systematic and predictable responses with regard to crystal size. These systems can be used for microgravity crystallization projects, for example in a space shuttle, and for crystallization work under terrestial conditions. The present invention is particularly useful for macromolecular crystallization, e.g. for proteins, polypeptides, nucleic acids, viruses and virus particles.
    • 可以通过动态控制的蒸气扩散或温度变化来启动和控制晶体生长。 一方面,本发明使用精确控制的蒸气扩散方法来监测和控制蛋白质晶体生长。 该系统利用湿度传感器和计算机控制下的各种界面,通过蒸发气体流同时实现多种不同生长方案的任何蒸发速率。 可以使用静态激光散射传感器来检测聚集事件并触发生长溶液的蒸发速率的变化。 可以使用控制/跟随器配置来主动地监视一个室并且相对于控制室精确地控制重复的腔室。 在第二方面,本发明利用蛋白质相对于温度的不同溶解度来控制蛋白质晶体的生长。 该系统包含微电脑控制下的微型热电装置,根据需要改变温度以生长给定蛋白质的晶体。 使用这种方法可以实现复杂的温度斜坡。 静态激光散射探头也可用于该系统中作为检测聚集事件的非侵入式探头。 自动化动态控制系统提供关于晶体尺寸的系统和可预测的响应。 这些系统可用于微重力结晶项目,例如在航天飞机中,以及在地下条件下的结晶作业。 本发明特别适用于大分子结晶,例如, 用于蛋白质,多肽,核酸,病毒和病毒颗粒。