Biochemistry
This content is Open Access.
The JoVE video player is compatible with HTML5 and Adobe Flash. Older browsers that do not support HTML5 and the H.264 video codec will still use a Flash-based video player. We recommend downloading the newest version of Flash here, but we support all versions 10 and above.
If that doesn't help, please let us know.
具有可移动XY阶段的平台孵化器:实现蛋白质细胞内快速光化学氧化的新平台
Chapters
Summary May 17th, 2021
Please note that all translations are automatically generated.
Click here for the English version.
一种新的静态平台用于利用一种称为蛋白质细胞内快速光化学氧化(IC-FPOP)的蛋白质足迹技术,对原生细胞环境中的蛋白质结构和相互作用部位进行特征。
Transcript
这种方法为当今苛刻的生物学问题提供了解决方案。通过细胞内FPOP实验,我们可以研究蛋白质-脂蛋白相互作用、蛋白质-蛋白质相互作用位点和构象变化区域。这项技术的优点是使用基于六井板的自动IC-FPOP平台,使生长细胞和在激光下进行细胞内FPOP研究成为可能。
这种方法可用于制药和生物技术行业,以及主要的学术和临床研究机构,特别是研究蛋白质动力学的大学的生物研究人员。首先,将平台孵化器从定位阶段拧开,并断开温度、气体和加湿器线路。用70%乙醇喷洒孵化器,并将其放置在细胞培养罩中。
从平台孵化器中取出六井板,固定板的原始盖子,并用显微镜确认细胞的结合,然后将带汇流细胞的六井板放回平台培养罩内的平台孵化器中。通过嵌入式端口将管子冲洗到井壁上,并在每个井中插入三个预切的 Tygon 管,并使用自定义的 3D 打印环固定它们。为泵取款准备集成软件脚本。
使用一个永久泵从所有六口井中完全去除细胞介质。在其他三个灭菌泵的每个通道中,主要溶剂,然后将过氧化氢和淬热缓冲液注入各自的交替管中,直到试剂到达孵化器端口。确认激光束已正确倾斜,并不受约束地到达孵化器。
使用外部传感器检查激光能量。确认光束对齐后,准备泵输液的集成软件脚本。以每分钟35毫升的速度将200毫升过氧化氢注入第一口井。
按激光软件的启动按钮,在 5 秒标记下触发时间机上 11 秒标记的脉冲。以每分钟35毫升的速度将125毫升淬奇溶液注入激光脉冲后的第一口井中。手动移动定位阶段,使下一口井与激光束对齐,并重复所有油井的过程。
在细胞培养罩中,使用细胞刮刀将每个井中的细胞转移到单独的 15 毫升圆锥管中。离心机在1200倍G五分钟。丢弃超自然物,在RIPA裂解缓冲器的100微升中恢复细胞。
将细胞转移到单个 1.2 毫升聚丙烯管中。将所有样品冷冻在液氮中,并放在零下80度的冰柜中,直到使用。要本地化FPOP修饰,使用液相色谱串联质谱分析分析消化细胞赖苏酸盐,然后计算修改程度。
为了确认平台孵化器条件足以在激光平台进行细胞培养,GCaMP2 暂时转入 HEK293T,并通过荧光成像评估了两个板的转染效率。进行了路西法酶检测,以量化转化效率。将流程系统中标记的 HEK293T 单元中的 FPOP 修改与平台孵化器中标记的 FPOP 修改进行比较。
平台孵化器在修改的蛋白质数量和这些蛋白质的总 FPOP 覆盖率方面都优于流动系统。在流动系统中,检测到两个经过修饰的肽,提供有限的结构信息。然而,在平台孵化器中检测到跨越行为序列的五种修改肽。
此处显示了在两个系统中具有修改蛋白的代理的串联MS光谱和未修改的肽行为。平台孵化器样品中的 FPOP 修改残留物包含 12 个修改后的残留物、流系统中的 3 个修改残留物和 1 个重叠的修改残留物。LC-MS MS 分析显示,平台孵化器中的体内 FPOP 对 792 种蛋白质进行了修改,而与流系统修改的 545 种蛋白质相比。
必须使细胞处于无菌状态。始终将平台孵化器带入无菌细胞培养罩中,插入所有必要的六井板、管子和环。这确保了实验的完整性。
Related Videos
You might already have access to this content!
Please enter your Institution or Company email below to check.
has access to
Please create a free JoVE account to get access
Login to access JoVE
Please login to your JoVE account to get access
We use/store this info to ensure you have proper access and that your account is secure. We may use this info to send you notifications about your account, your institutional access, and/or other related products. To learn more about our GDPR policies click here.
If you want more info regarding data storage, please contact gdpr@jove.com.
Please enter your email address so we may send you a link to reset your password.
We use/store this info to ensure you have proper access and that your account is secure. We may use this info to send you notifications about your account, your institutional access, and/or other related products. To learn more about our GDPR policies click here.
If you want more info regarding data storage, please contact gdpr@jove.com.
Your JoVE Unlimited Free Trial
Fill the form to request your free trial.
We use/store this info to ensure you have proper access and that your account is secure. We may use this info to send you notifications about your account, your institutional access, and/or other related products. To learn more about our GDPR policies click here.
If you want more info regarding data storage, please contact gdpr@jove.com.
Thank You!
A JoVE representative will be in touch with you shortly.
Thank You!
You have already requested a trial and a JoVE representative will be in touch with you shortly. If you need immediate assistance, please email us at subscriptions@jove.com.
Thank You!
Please enjoy a free 2-hour trial. In order to begin, please login.
Thank You!
You have unlocked a 2-hour free trial now. All JoVE videos and articles can be accessed for free.
To get started, a verification email has been sent to email@institution.com. Please follow the link in the email to activate your free trial account. If you do not see the message in your inbox, please check your "Spam" folder.