Interaction trap assay, reagents and uses thereof
First Claim
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1. A method for identifying agents which modulate a target protein-protein interaction, comprisingi. providing an interaction trap system including a prokaryotic host cell which contains:
- (a) a reporter gene operably linked to a transcriptional regulatory sequence which includes a binding site (DNA binding domain (DBD) recognition element) for a DNA-binding domain, (b) a first chimeric gene which encodes a first fusion protein, the first fusion protein including a DNA-binding domain and first test polypeptide, (c) a second chimeric gene which encodes a second fusion protein, the second fusion protein including an activation tag and second test polypeptide, wherein interaction of the first fusion protein and second fusion protein in the host cell results in a measurable change in expression of the reporter gene;
ii. contacting the host cell with test agents and measuring expression of the reporter gene; and
iii. identifying test agents which modulate expression of the reporter gene in a manner also dependent on expression of the first and second test polypeptides.
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Abstract
The present invention makes available an interaction trap system (hereinafter “ITS”) which is derived using recombinantly engineered prokaryotic cells.
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Citations
25 Claims
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1. A method for identifying agents which modulate a target protein-protein interaction, comprising
i. providing an interaction trap system including a prokaryotic host cell which contains: -
(a) a reporter gene operably linked to a transcriptional regulatory sequence which includes a binding site (DNA binding domain (DBD) recognition element) for a DNA-binding domain, (b) a first chimeric gene which encodes a first fusion protein, the first fusion protein including a DNA-binding domain and first test polypeptide, (c) a second chimeric gene which encodes a second fusion protein, the second fusion protein including an activation tag and second test polypeptide, wherein interaction of the first fusion protein and second fusion protein in the host cell results in a measurable change in expression of the reporter gene; ii. contacting the host cell with test agents and measuring expression of the reporter gene; and
iii. identifying test agents which modulate expression of the reporter gene in a manner also dependent on expression of the first and second test polypeptides. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for identifying agents which modulate a target DNA-protein interaction, comprising:
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i. providing a prokaryotic host cell which contains (a) a reporter gene operably linked to a transcriptional regulatory sequence which includes a binding site (DBD recognition element) for a DNA binding domain, (b) a chimeric gene which encodes a fusion protein, the fusion protein including a DNA binding domain which binds to the DBD recognition element, and an activation tag;
wherein interaction of the DNA binding domain of the fusion protein with the DBD recognition element in the host cell results in a measurable change in expression of the reporter gene; ii. contacting the host cell with test agents and measuring expression of the reporter gene; and
iii. identifying test agents which modulate expression of the reporter gene in a manner also dependent on expression of the fusion protein. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification