【求助】请问单独的GFP(绿色荧光蛋白)是不是由内质网核糖体合成?
丁香园论坛
有没有相关文献证明这个的?
我想找一个确定不在内质网合成的蛋白作为对照,不知GFP合不合适。
谢谢
链接:http://baike.baidu.com/view/32253.htm
http://www.bioon.com/biology/molebio/57332.shtml
对于这方面的专业知识,估计你老板能够给你更多的提示!呵呵!
没有疑问的是,apo GFP 可以且只可以定位于 cytoplasma ,而当目的蛋白质添加在 GFP 的 N 端的时候,蛋白质定位就是花样百出了。 why ? 当然我们现在都知道,这是信号肽的功劳。
楼主的问题也许是一个非常基础的问题,所以还是回到教科书去找答案吧。
In eukaryotic cells, one class of signal sequences
is recognized by the signal recognition particle
(SRP), which binds the signal sequence as
soon as it appears on the ribosome and
transfers the entire ribosome and incomplete
polypeptide to the ER. Polypeptides with
these signal sequences are moved into the ER
lumen as they are synthesized; once in the
lumen they may be modified and moved to the
Golgi complex, then sorted and sent to
lysosomes, the plasma membrane, or transport
vesicles.
上面这段话是从一本在网上所有论坛都几乎发烂了的一本教科书上找到的。楼主看到了也许会豁然开朗。吊个胃口吧,就不说哪本书了。
相关文献如下:
Görlich, D. & Mattaj, I.W. (1996) Nucleocytoplasmic transport.
Science 271, 1513–1518.
Hartmann-Petersen, R., Seeger, M., & Gordon C. (2003)
Transferring substrates to the 26S proteasome. Trends Biochem.
Sci. 28, 26–31.
Higgins, M.K. & McMahon, H.T. (2002) Snap-shots of clathrinmediated
endocytosis. Trends Biochem. Sci. 27, 257–263.
Neupert, W. (1997) Protein import into mitochondria. Annu. Rev.
Biochem. 66, 863–917.
Pryer, N.K., Wuestehube, L.J., & Schekman, R. (1992) Vesiclemediated
protein sorting. Annu. Rev. Biochem. 61, 471–516.
Rapoport, T.A., Jungnickel, B., & Kutay, U. (1996) Protein
transport across the eukaryotic endoplasmic reticulum and
bacterial inner membranes. Annu. Rev. Biochem. 65, 271–303.
Schatz, G. & Dobberstein, B. (1996) Common principles of
protein translocation across membranes. Science 271, 1519–1525.
Schekman, R. & Orci, L. (1996) Coat proteins and vesicle
budding. Science 271, 1526–1532.
Schmid, S.L. (1997) Clathrin-coated vesicle formation and protein
sorting: an integrated process. Annu. Rev. Biochem. 66, 511–548.
Varshavsky, A. (1997) The ubiquitin system. Trends Biochem.
Sci. 22, 383–387.
Voges, D., Zwickl, P., & Baumeister, W. (1999) The 26S
proteasome: a molecular machine designed for controlled proteolysis.
Annu. Rev. Biochem. 68, 1015–1057.
Ward, W.H.J. (1987) Diphtheria toxin: a novel cytocidal enzyme.
Trends Biochem. Sci. 12, 28–31.
我觉得信号肽只是适用于某些蛋白,因为很多膜蛋白(比如离子通道蛋白)将N端截断或即使N段带上比较大的tag不会影响表达(我记得教科书上写信号肽在N端,入核信号不一定)。
另外,我记得教科书上有写,内质网-高尔基体途径的蛋白多为膜蛋白,分泌蛋白等。而且刚才看了下维基百科,也这样写。
教科书是根据以前看翟中和的细胞生物学(也有可能记错了),其实我是想找一些有确定的文献支持的非内质网-高尔基体途径的蛋白。
“apo GFP 可以且只可以定位于 cytoplasma ”有文献支持吗?谢谢!
Anyway,谢谢楼上各位。
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