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无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

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Protein Expression and Purification Core Facility, EMBL Heidelberg

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Cite this Article: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

Lawrence, A., Besir, H. Staining of Proteins in Gels with Coomassie G-250 without Organic Solvent and Acetic Acid. J. Vis. Exp. (30), e1350, doi:10.3791/1350 (2009).

Abstract: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

在古典蛋白染色用考马斯亮蓝(CBB)与有毒和易燃的有机溶剂(甲醇,乙醇或异丙醇)和乙酸含量高的解决方案的协议是用于固定,染色和脱色凝胶中的蛋白质经SDS - PAGE分析。为了加快程序,在很短的时间微波炉加热的染色溶液是常用的。这通常会导致有毒或有害的甲醇,乙醇或异丙醇和醋酸在实验室应避免由于安全方面的考虑的强烈气味的挥发。在最初两个EM Wondrak(US2001046709(A1),US6319720(B1))专利申请公布一个协议,染色液的另一种成分是其中不含有机溶剂或酸是用来描述。溶解在bidistilled水的CBB(CBB G - 250每公升60 - 80毫克)和35毫米盐酸是作为唯一的染色溶液中的其他化合物的补充。 CBB staning凝胶完成后bidistilled水凝胶的SDS - PAGE和彻底清洗。通过加热凝胶在洗涤和染色步骤,完成这个过程可以更快,任何有毒或有害compunds蒸发。染色的蛋白质发生已经在1分钟内加热后的凝胶染色溶液和全面发展与略带蓝色的背景,完全是destained长时间洗染色bidistilled水凝胶后15-30分钟,而不会影响染色的蛋白质,带。

Protocol: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

第1部分:CBB染色溶液的制备

  1. 60-80毫克CBB G - 250是在1升bidistilled水溶解,搅拌2-4小时。最后,3毫升浓盐酸加入搅拌一分钟,以深蓝色的解决方案,并存储在黑暗供日后使用。该解决方案可存储几个星期到几个月的时间,而不会失去其染色效率。
  2. 浓盐酸应处理与常规护理UND通风​​柜下使用。最终的解决方案将在pH为2左右,所以手套,应使用和任何应避免与皮肤接触。

第2部分:SDS - PAGE电泳

  1. 蛋白质样品的适当等份混合装载到终浓度为1X样缓冲液的缓冲。我们用125MM Tris/H3PO4(25 ° C时的pH值7.5),EDTA的2MM,4%SDS,200mm的数码地面电视,0.02%溴酚蓝和50%的甘油2X样缓冲液。以及可用于其他装载缓冲区进行SDS - PAGE。
  2. 蛋白质样品被加热约5分钟装货前。与此同时,凝胶电泳室的运行准备。我们使用预制4-12%NuPAGE ©双三凝胶(Invitrogen公司)在XCell SureLock ®迷你细胞与MES缓冲(Invitrogen公司)作为运行缓冲液,但任何其他的凝胶电泳系统也可作为使用。
  3. 蛋白质样品装入凝胶电泳在220V和50分钟的运行。

第3部分:凝胶染色

  1. 凝胶盒拆卸和凝胶放置在一个盒子里,为随后的清洗步骤。
  2. bidistilled水约100毫升,加入凝胶,在微波炉加热30秒。沸腾发生之前,应停止暖气。与凝胶的方块,然后放置在一个振动筛为3-5分钟。重复此清洗步骤是用新鲜水的两倍。
  3. 补充足够的CBB染色的解决方案是覆盖胶框和框在微波炉中加热10秒。未经煮沸。完成染色,凝胶的方块,然后放置在一个摇床。早1分钟后,蛋白条带,可以观察到,经过15-30分钟。染色是在大多数情况下足够强。
  4. 染色溶液浇灭了50-100毫升bidistilled水,以补充,以进一步destain在摇床凝胶的蓝色背景光。进一步脱色如果需要的水可以取代淡水。
  5. 凝胶可以被扫描,拍照或长期贮存干燥

第4部分:代表性的成果:

见图。 1所描述的过程,一个正确的染色凝胶。

见图。一个尚未足够长的时间染色前和残留的SDS洗凝胶2,抑制高效率的染色。请注意标记的车道(*)包含相同数量的标志蛋白。


图1:代表加载后的一种蛋白质纯化的样品(分子量标记*)的凝胶染色。


图2:CBB染色凝胶尚未洗净CBB染色前足够长的时间。蛋白条带出现较弱的(请注意,标记巷*包含在图1的蛋白质相同金额)。

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Discussion: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

  • 洗涤步骤是为高效的蛋白质染色是至关重要的。 2分以下或水(<50毫升)的体积缩小减少洗涤时间,可以在淡蓝色的蛋白条带,最有可能由于凝胶中残留的SDS的结果。
  • 如果蛋白质质谱分析,在微波炉中加热的步骤应跳过,扩展到约10分钟,每一步和染色时间延长,直到带的强度凝胶洗涤时间足够强大。加热质谱的蛋白质的交联凝胶的凝胶基质,从而检测的蛋白质可能会受到阻碍。
  • 相反的CBB G - 250,可以使用CBB R - 250根据原协议由Wondrak。我们有没有比较两种染料方方,在我们的实验室,因为我们有CBB G - 250的股票,这种染料有良好的结果。
  • 该过程的速度和遗漏的有毒或有害溶剂,在洗涤和染色步骤是使用此协议的最重要和最有说服力的因素。灵敏度是在同一范围内的古典CBB染色协议和商业CBB染色解决方案,一直没有为我们的SDS - PAGE分析重组蛋白表达和纯化领域中的限制因素。

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Disclosures: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

没有利益冲突。上面描述的过程最初是在由电磁Wondrak专利申请公布(见参考文献)。

Acknowledgements: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

,我们愿意承认的伊内斯拉克的技术援助。

Materials: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

Name Company Catalog Number Comments
Coomassie Brilliant Blue G-250 AppliChem A3480 any other CBB G-250 could be used as well
Concentrated HCl

References: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

  1. Wondrak, E. M. (2001). Process for fast visualization of protein. (US6319720 (B1))
  2. Wondrak, E. M. (2001). Solution for fast visualization of protein. (US2001046709 (A1)).

Ask the Author: 无有机溶剂和醋酸,蛋白质与考马斯亮蓝G - 250凝胶染色

6 Comments

Hi,
This is very clear and easy way of staining the gels. I would like to know the consequences of using acetic acid and organic solvents in staining the proteins electrophoresd using polyacrylamide gels, or what was is this method advantageous than the traditional coomassie staining using acetic acid and methanol ?
your replies are appreciated

regards,
Rajesh

1

Reply

Posted by: AnonymousAugust 17, 2009, 2:23 AM

Hi,
as indicated in the article, the main factors for using this method are avoiding organic solvents and acetic acid for safety reasons and the speed of staining. This method has a lower sensitivity compared to longer protocols but for our applications the speed of staining compensates that.
We haven't analyzed the effect of using organic solvents or acetic acid versus HCl in water, so I can't tell you if e.g. the fixation of the proteins in the gel is affected or more protein is dissolved from the gel leading to lower sensitivity. I hope this answers your questions.
Best regards
Hseyin

1.1

Reply

Posted by: Hseyin B.August 25, 2009, 8:14 AM

Hi,
May we have a pdf version of your method ?
Also, at what temperature the solutions can be heated ?
Is your method compatible with mass spectrometry-based micriosequencing ?

Best regards,

Hristo Atanassov

2

Reply

Posted by: HristoNovember 12, 2009, 10:32 AM

Hi,
there should be a link to the pdf-file on the page of the video. If you cant find it, please contact me at www.embl.de/services/core_facilities/pepcore/members/index.php?s_personId=4403.
As described, we heat the gel in the microwave oven for about 10 sec so it's getting hot without boiling. I guess it's about 70-80C.
As you may know, you should not heat a gel in the microwave if you want to do mass spec. afterwards as you will decrease the efficiency of extraction of protein bands from the gel. Additionally, the sensitivity of this fast method is lower than for some Coomassie protocols optimized for high sensitivity so it may not be ideal for very low protein amounts (<10 ng).
Best regards

Huseyin

2.1

Reply

Posted by: Hseyin B.November 13, 2009, 4:16 AM

Hi,
there should be a link to the pdf-file on the page of the video. If you cant download it, please contact me at www.embl.de/services/core_facilities/pepcore/members/index.php?s_personId=4403.
As described, we heat the gel in the microwave oven for about 10 sec so it's getting hot without boiling. I guess it's about 70-80C.
As you may know, you should not heat a gel in the microwave if you want to do mass spec. afterwards as you will decrease the efficiency of extraction of protein bands from the gel. Additionally, the sensitivity of this fast method is lower than for some Coomassie protocols optimized for high sensitivity so it may not be ideal for very low protein amounts (<10 ng).
Best regards

Huseyin

2.2

Reply

Posted by: HuseyinNovember 16, 2009, 12:17 PM

Hi,
Thank you for this method. However, I would like to know is there some special procedure when using this method with Protein Agarose gel electrophoresis? I tried with Agarose gel but it appears the entire gel is stained permanently blue. Have you tried this method with agarose gel or modified it for such purpose?
Thank you.

3

Reply

Posted by: Dominic AgyeiSeptember 28, 2011, 8:48 AM

Hi,
we haven't tried this with agarose gels, but I'm sure you need to do some modification of the procedure. The most important one would be avoiding the microwave step for washing and staining. This would obviously damage the agarose gel. As far as I know the destaining of agarose gels can take much longer compared to poly-acrylamide gels. Not sure if due to larger pore size thus more dye inside the gel or higher affinity of the dye to agarose due to more polar structure of agarose, maybe both. I hope that helps.

3.1

Reply

Posted by: H. BesirSeptember 28, 2011, 10:20 AM

Hi,
I just want to say how I'm thankful because of sharing this very wonderful fast method by this site. It helped me to have more clear gels and to save the time.
Thank you again!
Hanie

4

Reply

Posted by: Hanie k.January 27, 2012, 12:46 PM

It seems the protocol is simple and easy. I will try. If I want to make just 100mL of staining solution, I would take 6mg dye, 100mL water and 0.3mL HCL. Does this work?

5

Reply

Posted by: Kiranmayee. PFebruary 13, 2012, 12:34 AM

Hi,
I can say, It works, especially when your protein concentration on gel lanes is high enough (according to my own experience). Give it a try!
Be lucky

5.1

Reply

Posted by: Hanie k.February 14, 2012, 5:14 AM

We are using this method but have encountered an occasional glitch... our gels are blue with negative (transparent) bands where the protein should be.... We are considering the possibility that this is the result of insufficient washing prior to staining, but this is not consistent with the gel that you have shown (which was not washed enough).

Any suggestions would be greatly appreciated.

6

Reply

Posted by: JonFebruary 20, 2012, 10:01 AM

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