Dunphy W G, Pfeffer S R, Clary D O, Wattenberg B W, Glick B S, Rothman J E
Proc Natl Acad Sci U S A. 1986 Mar;83(6):1622-6. doi: 10.1073/pnas.83.6.1622.
Vesicular transport between successive compartments of the mammalian Golgi apparatus has recently been reconstituted in a cell-free system. In addition to ATP, transport requires both membrane-bound and cytosolic proteins. Here we report that the cytosol fraction from yeast will efficiently substitute for mammalian cytosol. Mammalian cytosol contains several distinct transport factors, which we have distinguished on the basis of gel filtration and ion-exchange chromatography. Yeast cytosol appears to contain the same collection of transport factors. Resolved cytosol factors from yeast and mammals complement each other in a synergistic manner. These findings suggest that the molecular mechanisms of intracellular protein transport have been conserved throughout evolution. Moreover, this hybrid cell-free system will enable the application of yeast genetics to the identification and isolation of cytosolic proteins that sustain intracellular protein transport.
最近,在无细胞系统中重建了哺乳动物高尔基体连续区室之间的囊泡运输。除ATP外,运输还需要膜结合蛋白和胞质蛋白。在此,我们报告酵母的胞质溶胶部分可有效替代哺乳动物的胞质溶胶。哺乳动物胞质溶胶包含几种不同的运输因子,我们已通过凝胶过滤和离子交换色谱法对其进行了区分。酵母胞质溶胶似乎含有相同的运输因子组合。来自酵母和哺乳动物的已解析胞质溶胶因子以协同方式相互补充。这些发现表明,细胞内蛋白质运输的分子机制在整个进化过程中一直得到保留。此外,这种无细胞杂交系统将使酵母遗传学能够应用于鉴定和分离维持细胞内蛋白质运输的胞质蛋白。