24小时热门版块排行榜    

查看: 4265  |  回复: 11

丫头7976

铜虫 (正式写手)

[求助] 关于在表达蛋白和GFP蛋白之间的linker

各位好,我最近在做膜蛋白的表达,在构建载体的时候我在膜蛋白的C端还加了GFP指示蛋白,但是在诱导表达后,根本看不到菌发出绿色荧光,而我只表达GFP时却能看到菌是绿色的,我在构建载体的时把膜蛋白和GFP直接连在一起了,中间没有加linker regions,我想问一下各位,我的菌株看不出绿色的原因是不是我没有加一个linker的原因呢,如果有做过这方面的大侠是不是可以知道一下我呢,多谢各位!
回复此楼

» 收录本帖的淘帖专辑推荐

博士学习

» 猜你喜欢

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

bio-research

金虫 (职业作家)

【答案】应助回帖

★ ★ ★ ★ ★
丫头7976(金币+3): Thank you for your advices,but 2011-06-06 17:42:47
dhd997(金币+5): good 2011-06-06 21:28:13
protein of interest surely weakens fluorescence of GFP with linker or without linker.
i have ever made experiment about expression of fusion protein including GFP,
the fusion protein including GFP can emit green fluorescence although its green fluorescence is weaker than that of control.
but the fusion protein in my experiment is located at the cytoplasm, and your protein occured in the membrane, I don`t know whether location of protein including GFP effects fluorescence emission or not.
家有小子初长成!(Nothing is impossible to a willing heart!)
2楼2011-06-06 11:13:02
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

丫头7976

铜虫 (正式写手)

引用回帖:
Originally posted by bio-research at 2011-06-06 11:13:02:
protein of interest surely weakens fluorescence of GFP with linker or without linker.
i have ever made experiment about expression of fusion protein including GFP,
the fusion protein including GF ...

Thank you very much for your advice, but there is a question, when you express fusion protein including GFP,  can you watch the green fluorescence with the naked eye ?
3楼2011-06-06 17:47:22
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

bio-research

金虫 (职业作家)

【答案】应助回帖

丫头7976(金币+1): thanks 2011-06-07 16:11:20
引用回帖:
Originally posted by 丫头7976 at 2011-06-06 17:47:22:
Thank you very much for your advice, but there is a question, when you express fusion protein including GFP,  can you watch the green fluorescence with the naked eye ?

no,I can`t.
even green fluorescence wasn`t seen in the control group(only GFP) by naked eyes.
家有小子初长成!(Nothing is impossible to a willing heart!)
4楼2011-06-06 17:59:40
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

西瓜

荣誉版主 (知名作家)

【答案】应助回帖

★ ★
丫头7976(金币+2): thanks 2011-06-07 16:09:05
dhd997(金币+2): 还拽上了 2011-06-07 16:51:12
引用回帖:
Originally posted by 丫头7976 at 2011-06-06 17:47:22:
Thank you very much for your advice, but there is a question, when you express fusion protein including GFP,  can you watch the green fluorescence with the naked eye ?

You can't see the fluorescence if the GFP is not excitated. But, if your fusion protein is well expressed, you can see that the bacteria expressing the fusion protein is green, without excitation of GFP. If you purify the fusion protein, the solution containing the protein is also green, very lovely

I've seen those with my own eyes. So, trust me

[ Last edited by 西瓜 on 2011-6-6 at 22:48 ]
5楼2011-06-06 22:35:00
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

丫头7976

铜虫 (正式写手)

引用回帖:
Originally posted by 西瓜 at 2011-06-06 22:35:00:
You can't see the fluorescence if the GFP is not excitated. But, if your fusion protein is well expressed, you can see that the bacteria expressing the fusion protein is green, without excita ...

thank you for your help, I'd like to make a quest if I may,could you give me  a QQ number? I want to make a more specific communications. I hope you will meet.
6楼2011-06-07 16:18:04
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

西瓜

荣誉版主 (知名作家)

引用回帖:
Originally posted by 丫头7976 at 2011-06-07 16:18:04:
thank you for your help, I'd like to make a quest if I may,could you give me  a QQ number? I want to make a more specific communications. I hope you will meet.

不客气啊
你是要偶QQ还是要我帮你申请个QQ?
反正都ok……站内短消息联系我就好。
7楼2011-06-08 23:11:27
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

丫头7976

铜虫 (正式写手)


dhd997(金币+1): 欢迎来本版继续交流 2011-07-17 09:42:46
引用回帖:
Originally posted by 丫头7976 at 2011-06-07 16:18:04:
thank you for your help, I'd like to make a quest if I may,could you give me  a QQ number? I want to make a more specific communications. I hope you will meet.

你好,我最近又在做膜蛋白与GFP的融合蛋白,我诱导表达后,用肉眼看不出菌体是绿色的,是我的蛋白的表达量少看不出绿色呢,还是说得用激发光激发才能看出绿色呢,你有做过膜蛋白与GFP融合蛋白的表达吗,确定能用肉眼看出菌体是绿色的吗,请用中文回复我吧,英文交流的不是很清楚,谢谢你啦
8楼2011-07-16 21:13:56
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

mybrony

银虫 (正式写手)

这个问题我也遇到了,linker帮助不大哦,我试过的
9楼2011-11-29 18:39:53
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

roomofxw

木虫 (正式写手)

我随便敲敲键盘的啊
SDS-PAGE确定GFP是否表达了,或者融合蛋白表达量很低
膜蛋白具有疏水区域,倾向于形成聚集体,聚集有可能造成GFP功能丧失,甚至性成包涵体。
双阅读框共表达目的蛋白和GFP,确认目的蛋白特性是否对GFP有影响。
另外我做过大肠和酵母表达GFP,肉眼是可以观察到绿色菌体
但是如果表达量比较低的情况下,我认为还是需要荧光显微镜的
10楼2011-11-30 11:47:31
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 丫头7976 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[基金申请] 科研孤儿太难了 +14 我4大白菜 2026-08-20 15/750 2026-08-20 22:33 by 袁向阳007
[基金申请] 让我中一个面上吧! +8 大萍1987 2026-08-20 10/500 2026-08-20 21:48 by 大萍1987
[基金申请] 言之凿凿,明天官网会通知放榜? +15 医学老男孩 2026-08-20 17/850 2026-08-20 20:35 by CaoLG
[基金申请] 时间戳又变了 +12 wuchongjun 2026-08-20 17/850 2026-08-20 20:05 by spzhao
[基金申请] 今天系统多次维护,明天很可能放榜! +10 zju2000 2026-08-16 11/550 2026-08-20 20:02 by cl479861084
[基金申请] 时间戳变了,能看出什么问题? +18 基诺咪客 2026-08-17 23/1150 2026-08-20 17:19 by Godzela
[基金申请] 只有每年这种时候来逛逛小木虫 +21 yaoyewhu2008 2026-08-20 22/1100 2026-08-20 17:03 by yaoyewhu2008
[基金申请] 放榜前的不淡定 40+3 snowwithsea 2026-08-19 12/600 2026-08-20 15:56 by lfy8008
[基金申请] 重要消息,中午系统在维护 +11 yuleib84 2026-08-18 12/600 2026-08-20 11:09 by xskun
[教师之家] 为什么余额宝的年化利率越来越低?主要原因有哪些? +5 瞬息宇宙 2026-08-15 5/250 2026-08-19 20:23 by super2002521
[基金申请] 今天放榜没戏了吧 +4 yuleib84 2026-08-19 5/250 2026-08-19 19:52 by hhs666
[基金申请] 朋友圈看到的 +6 wangzilk 2026-08-18 8/400 2026-08-19 10:55 by Haru815
[基金申请] 快农历七夕节了,轻松一下,男人悄悄话,女施主请不要进来。 +6 Tide man 2026-08-14 7/350 2026-08-19 09:56 by ZJTJZ
[基金申请] 什么时候开奖? +6 CrisMessi 2026-08-18 6/300 2026-08-19 08:06 by Equinoxhua
[基金申请] 明天放榜? +5 Shxjjxjkx 2026-08-18 5/250 2026-08-18 18:14 by -大大大大大-
[基金申请] 时间戳又变了8-15 +14 archvillain 2026-08-15 26/1300 2026-08-18 13:37 by phantomgost
[基金申请] 今天维护系统维护 祝所有人 高中 +8 gjjjzhong 2026-08-18 9/450 2026-08-18 13:01 by 家与远方
[基金申请] 93BebMhtakh前后11位开头都是大写 +4 且听虎啸 2026-08-17 5/250 2026-08-18 00:49 by 蔡棒棒菂
[基金申请] 感觉是下周放榜了 +6 angus9576 2026-08-17 11/550 2026-08-17 23:57 by angus9576
[精细化工] 招聘 金属平磨液,抛光液研发工程师 +3 小天0311 2026-08-14 3/150 2026-08-16 07:31 by H9PLUS
信息提示
请填处理意见