脂质立方相(LCP)结晶已经发展成为膜蛋白结晶的一种重要方法,其中脂质单油酸甘油酯(Monoolein)是创建稳定LCP的首选。然而,在过去几年中,短链脂质7.7 MAG[4,7]、7.8 MAG[6-8]和7.9 MAG[5,7]变得越来越受欢迎。最近在将高黏度脂质立方相应用于连续飞秒晶体学(LCP-SFX)方面的进展[1-3],通过以下方式进一步加速了LCP方法的成功:
- 将载有晶体的黏性LCP直接送入X射线自由电子激光(XFEL)光束中(与液体注射器相比,减少了样品消耗);
- 利用在LCP中生长的固有小晶体;
- 避免了从LCP中进行棘手的晶体装载。
LCP脂质 | 脂质结构 | 货号 | 规格 |
---|---|---|---|
Monoolein 9.9 MAG | ![]() |
X-LCP-101 | 1 g |
7.7 MAG | ![]() |
X-LCP-105 | 100 mg |
7.8 MAG | ![]() |
X-LCP-106 | 100 mg |
7.9 MAG (Stable at low temperatures) |
![]() |
X-LCP-107 | 100 mg |
Monopalmitolein 9.7 MAG | ![]() |
X-LCP-102 | 1 g |
Monovaccenin 11.7 MAG | ![]() |
X-LCP-103 | 100 mg |
Monoeicosenoin 11.9 MAG | ![]() |
X-LCP-104 | 1 g |
JBScreen LCP旨在高效筛选LCP中的结晶条件。上述表格中的每种LCP脂质都能创建一个稳定的脂质立方相,可用于与JBScreen LCP进行结晶设置。其96种条件是通过对192种成功通过in meso方法结晶并产生结构的整合膜蛋白进行数据挖掘得出的[7]。该筛选按沉淀剂的浓度和类型排序,并且不含乙酸镉。
产品名称 | 货号 | 规格 |
JBScreen LCP | CS-340 | 4×24 solutions (10 ml each) |
JBScreen LCP HTS | CS-213L | 96 solutions (1,7 ml each) |
文献:
[1] Nogly et al. (2016) Lipidic cubic phase injector is a viable crystal delivery system for time-resolved serial crystallography. Nat. Commun. 7:12314.
[2] Zhu et al. (2016) Serial Femtosecond Crystallography of Membrane Proteins. Adv. Exp. Med. Biol. 922:151.
[3] Batyuk et al. (2016) Native phasing of x-ray free-electron laser data for a G protein-coupled receptor. Sci. Adv. 2:e1600292.
[4] Coincon et al. (2016) Crystal structures reveal the molecular basis of ion translocation in sodium/proton antiporters. Nat. Struct. Mol. Biol. 23:248.
[5] Li et al. (2015) Ternary structure reveals mechanism of a membrane diacylglycerol kinase. Nat. Commun. 6:10140.
[6] Fowler et al. (2015) Gating Topology of the Proton-Coupled Oligopeptide Symporters. Structure 23:290.
[7] Caffrey (2015) A comprehensive review of the lipid cubic phase or in meso method for crystallizing membrane and soluble proteins and complexes. Acta Cryst F 71:3.
[8] Li et al. (2013) Crystal structure of the integral membrane diacylglycerol kinase. Nature 497:521.
[9] Misquitta et al. (2004) Rational design of lipid for membrane protein crystallization. Journal of Structural Biology 148:169.