protein-protein interaction and expression libraries. at N.P.Dantuma at N.P.Dantuma
Fri Feb 9 09:42:34 EST 1996

Hi Joaquim,

If you can label the known protein in such a way that it can be visualized 
at the light microscopical level or if you can detect it with antibodies 
this article might be of interest: Nucleic Acids Research 19: 4556. A method 
for cDNA cloning in COS cells irrespective of subcellular site of 
expression. In this letter an antibody is used to select COS cells which 
express a certain cytoplasmic protein but maybe you can replace the antibody 
by your protein and pick up COS cells from your expression library that 
contains proteins that interact with your labeled protein. 

Just an idea.

Nico Dantuma

In article <jculi-0602962136250001 at> jculi at (
Joaquim Culi ) writes:>From: jculi at (Joaquim Culi )
>Subject: protein-protein interaction and expression libraries.
>Date: 6 Feb 1996 20:29:14 GMT

>Dear netters,
>Do you know how to isolate proteins that interact with another known protein?
>I've been trying the two hybrid system but it hasn't worked very well
>because the piece of my protein that I suspect contains the interaction
>domain also activates transcription. Now I would like to screen a
>expression library in order to find proteins that interact with my protein
>but I don't know any protocol or even if it has been successfully done by
>someone else!!.

>Any protocol or reference will be greatly appreciated.


>Joaquim Culi

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