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    • 10. 发明专利
    • AT289353T
    • 2005-03-15
    • AT97952369
    • 1997-12-10
    • SQUIBB BRISTOL MYERS CO
    • KORNACKER MICHAEL G
    • G01N33/50C12N1/21C12N15/09C12N15/10C12N15/70C12Q1/68C12Q1/6897G01N33/15C12N15/63
    • A two-hybrid system that can detect homo- and heterodimeric protein interactions in E. coli and other cells. This system is useful for the same applications as a yeast two-hybrid system; i.e. interaction cloning, mapping protein interaction domains, analyzing protein interactions, detecting protein interactions and detecting modulators thereof. The invention concerns a prokaryotic host cell comprising: (a) a fusion protein having (i) a first DNA-binding domain and (ii) a first interacting domain; (b) a fusion protein having (i) a second DNA-binding domain and (ii) a second interacting domain capable of binding to the first interacting domain; and (c) a nucleic acid molecule having a reporter gene operatively linked to (i) a promoter, (ii) a first operator site capable of binding to the first DNA-binding domain, located upstream of the promoter, and (iii) a second operator site capable of binding the second DNA-binding domain, located downstream of the promoter of the reporter gene; wherein binding of the first interacting domain to the second interacting domain is signaled by altered expression of the reporter gene.