24小时热门版块排行榜    

查看: 1139  |  回复: 18
当前主题已经存档。
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

田园1983

木虫 (正式写手)

[交流] 发金币求助--磷酸化蛋白检测问题

我的实验目的:
检测病人和正常人外周血淋巴细胞中某蛋白磷酸化水平的差异

我要检测的蛋白有一个酪氨酸磷酸化位点,本来打算通过elisa和western的方法检测,但是没有查到商品化的用来测该蛋白磷酸化的kit和抗体。好像有商品化的酪氨酸磷酸化抗体,能不能用来测我的目的蛋白?如果可以的话,怎么做呢?或者有没有其他解决办法?

从来没有做过蛋白磷酸化检测,周围人也没有了解这方面的,请虫友们多多提宝贵意见!小女子跪谢啦!

[ Last edited by 350784478 on 2009-8-5 at 20:57 ]
回复此楼
放下个人素质,享受缺德人生,拒绝精神内耗,有事直接发疯,与其委屈自己,不如为难别人
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

HarveyWang

捐助贵宾 (知名作家)

海外行者

★
小木虫(金币+0.5):给个红包,谢谢回帖交流
给你另外一篇很有价值的文献:


Profiling the Global Tyrosine Phosphorylation State

Kazuya Machida, Bruce J. Mayer, and Peter Nollau
Mol Cell Proteomics 2003: 215–233 First Published on May 17, 2003 doi:10.1074/mcp.R300002-MCP200

Protein tyrosine kinases and protein tyrosine phosphatases play a key role in cell signaling, and the recent success of specific tyrosine kinase inhibitors in cancer treatment strongly validates the clinical relevance of basic research on tyrosine phosphorylation. Functional profiling of the tyrosine phosphoproteome is likely to lead to the identification of novel targets for drug discovery and provide a basis for novel molecular diagnostic approaches. The ultimate aim of current mass spectrometry-based phosphoproteomic approaches is the comprehensive characterization of the phosphoproteome. However, current methods are not yet sensitive enough for routine detection of a large percentage of tyrosine-phosphorylated proteins, which are generally of low abundance. In this article, we discuss alternative methods that exploit Src homology 2 (SH2) domains for profiling the tyrosine phosphoproteome. SH2 domains are small protein modules that bind specifically to tyrosine-phosphorylated peptides; there are more than 100 SH2 domains in the human genome, and different SH2 domains bind to different classes of tyrosine-phosphorylated ligands. These domains play a critical role in the propagation of signals in the cell, mediating the relocalization and complex formation of proteins in response to changes in tyrosine phosphorylation. We have developed an SH2 profiling method based on far-Western blotting, in which a battery of SH2 domains is used to probe the global state of tyrosine phosphorylation. Application to the classification of human malignancies suggests that this approach has potential as a molecular diagnostic tool. We also describe ongoing efforts to modify and improve SH2 profiling, including the development of a multiplexed assay system that will allow high-throughput functional profiling of the tyrosine phosphoproteome.
【我一直认为做土匪很性感很坏,很直接,可以大声喊:JCMM我爱你!所以,我自从博士毕业后,就一直在寻找黑道大哥一起去抢钱、抢粮、抢地盘】
16楼2009-06-30 21:34:18
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 19 个回答

yyn0452

木虫 (正式写手)


★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
田园1983(金币+10,VIP+0): 6-27 22:13
田园1983(金币+10,VIP+0): 6-27 22:29
先加磷酸化抗体,
然后strip, 再加普通抗体,暴总蛋白
2楼2009-06-27 17:18:42
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

aaaaaa1380

至尊木虫 (知名作家)

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
amisking(金币+3,VIP+0):哈哈,最近还真比较活跃啊|! 6-27 22:42
田园1983(金币+10,VIP+0):非常感谢! 6-27 22:54
强烈建议用质谱(MS)方法检测,灵敏度高,特别对氨基酸修饰检测特别合适(如果知道该蛋白质的全序列,那就最好了),因为如果发生磷酸化,相应的质谱峰m/z会发生+91 迁移。另外做质谱价格肯定比抗体Kit便宜不少。许多公司都可以做。
具体过程如下:
如果你是跑胶得到的蛋白,可以用胰酶进行胶内酶切, 然后对酶切得到的肽段进行MS鉴定(MALDI-TOF MS 或者ESI-MS),包括一级谱,二级谱,通过相应肽段的二级谱解谱,就可以鉴定出你要的磷酸化位点。
如果你得到的蛋白在溶液中,可以进行溶液酶切,一下过程如上所述。

祝实验顺利!!!
3楼2009-06-27 22:38:59
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

三磷酸腺苷

铁杆木虫 (职业作家)

★ ★ ★ ★ ★ ★ ★ ★ ★ ★
田园1983(金币+10,VIP+0):谢谢啦! 6-27 22:54
但是质谱法需要纯化蛋白,前期步骤繁琐
用western比较好
真的没有相应的磷酸化抗体?
都查了哪些试剂公司呢?
4楼2009-06-27 22:50:24
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
普通表情 龙 兔 虎 猫 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[基金申请] 师弟论文见刊大半年才想起来申请专利,还能抢救一下吗? +5 13108017953 2026-09-21 5/250 2026-09-27 16:46 by Leogzhya
[教师之家] 某top大学教授说“能够在市场中兑现的能力才是真能力”无比同意! +3 zju2000 2026-09-26 3/150 2026-09-27 16:26 by lala1008
[硕博家园] 上海工程技术大学 激光智能制造课题组 2027级博士研究生招生 +5 oxidpl 2026-09-20 7/350 2026-09-27 10:43 by Equinoxhua
[博后之家] 售SCI文章,我:8O.5.5.1O.54,科目全,可十急 +3 ViqFlLSxHDGt 2026-09-26 3/150 2026-09-27 10:42 by 4IW0sJvtEqX8
[博后之家] 售SCI一区T0P文章,我:8O.55.1.O.5.4,科目齐全,可+急 +3 ViqFlLSxHDGt 2026-09-26 3/150 2026-09-27 10:21 by 4IW0sJvtEqX8
[公派出国] 售SCI一区T0P文章,我:8.O.55.1.O54,科目全,可伽急 +3 ViqFlLSxHDGt 2026-09-26 3/150 2026-09-27 10:15 by 4IW0sJvtEqX8
[考博] 售SCI一区T0P文章,我:8.O.55.1.O.54,科目齐全,可+急 +3 oeyPlfmMUpOC 2026-09-26 3/150 2026-09-27 09:13 by 4IW0sJvtEqX8
[公派出国] 售SCI文章,我:8O5.5.1.O.54,科目齐全,可+急 +3 GxESXJmptOtQ 2026-09-25 4/200 2026-09-27 06:44 by XgCC8uTcwILl
[考博] 售SCI一区T0P文章,我:8.O.55.1.O.5.4,科目全,可+急 +3 GxESXJmptOtQ 2026-09-25 4/200 2026-09-27 06:42 by XgCC8uTcwILl
[论文投稿] 售SCI一区T0P文章,我:8O.55.1.O.5.4,科目齐全,可+急 +3 GxESXJmptOtQ 2026-09-25 4/200 2026-09-27 06:39 by XgCC8uTcwILl
[找工作] 售SCI一区文章,我:8.O.55.1.O.54,科目齐全,可伽急 +3 vQZoDrrm7mUF 2026-09-25 3/150 2026-09-27 06:08 by XgCC8uTcwILl
[公派出国] 售SCI一区T0P文章,我:8.O55.1.O.54,科目全,可十急 +3 vQZoDrrm7mUF 2026-09-25 3/150 2026-09-27 06:05 by XgCC8uTcwILl
[论文投稿] 售SCI一区文章,我:8.O.55.1.O.54,科目齐全,可伽急 +4 vQZoDrrm7mUF 2026-09-25 4/200 2026-09-27 05:56 by XgCC8uTcwILl
[找工作] 售SCI一区文章,我:8.O.551.O.5.4,科目全,可伽急 +5 vQZoDrrm7mUF 2026-09-25 5/250 2026-09-27 05:53 by XgCC8uTcwILl
[博后之家] 售SCI一区T0P文章,我:8.O55.1.O.54,科目全,可十急 +4 vQZoDrrm7mUF 2026-09-25 4/200 2026-09-27 05:50 by XgCC8uTcwILl
[公派出国] 售SCI文章,我:8O5.5.1.O.54,科目齐全,可+急 +4 vQZoDrrm7mUF 2026-09-25 4/200 2026-09-27 05:44 by XgCC8uTcwILl
[考博] 售一区SCI文章T0P,我:8O.551.O54,科目全,可十急 +3 vQZoDrrm7mUF 2026-09-25 3/150 2026-09-27 05:44 by XgCC8uTcwILl
[论文投稿] 售SCI一区T0P文章,我:8O.55.1.O.54,科目全,可伽急 +3 vQZoDrrm7mUF 2026-09-25 6/300 2026-09-27 05:42 by XgCC8uTcwILl
[找工作] 售SCI一区T0P文章,我:8O.55.1.O.5.4,科目齐全,可+急 +4 PGTSwSC3F6nQ 2026-09-24 5/250 2026-09-25 11:19 by yhq9807
[公派出国] 售SCI-T0P文章,我:8O.5.5.1.O.54,科目齐全,可+急 +4 PGTSwSC3F6nQ 2026-09-24 7/350 2026-09-25 11:18 by yhq9807
信息提示
请填处理意见