FB2026_03 , released September 17, 2026
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Term dihydrofolate reductase reconstruction ID (Ontology) MI:0111 (Molecular Interactions)
Definition The gene for DHFR is rationally dissected into two fragments called F[1,2] and F[3]. Two proteins or protein domains that are thought to bind to each other can then be fused to either of the two DHFR fragments. Reconstitution of enzyme activity can be monitored in vivo by cell survival in DHFR-negative cells grown in the absence of nucleotides. A fluorescence assay can also be carried out taking advantage of fMTX binding to reconstituted DHFR. The basis of this assay is that complementary fragments of DHFR, when expressed and reassembled in cells, will bind with high affinity (Kd 5 540 pM) to fMTX in a 1:1 complex. fMTX is retained in cells by this complex, whereas the unbound fMTX is actively and rapidly transported out of the cells. Survival depends only on the number of molecules of DHFR reassembled.
Also Known As"dhfr reconstruction"
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  experimental interaction detection
   |__protein complementation assay
       |__dihydrofolate reductase reconstruction  1 rec.
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  • "dhfr reconstruction" EXACT PSI-MI-short
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