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- W2001349198 abstract "The rapid rate at which cancer cells divide necessitates a mechanism for telomere maintenance, and in approximately 90% of all cancer types the enzyme telomerase is used to maintain the length of telomeric DNA. Telomerase is a multi-subunit enzyme that minimally contains a catalytic protein subunit, hTERT, and an RNA subunit, hTR. Proper assembly of telomerase is critical for its enzymatic activity and therefore is a requirement for the proliferation of most cancer cells. We have developed the first high-throughput screen capable of identifying small molecules that specifically perturb human telomerase assemblage. The screen uses a scintillation proximity assay to identify compounds that prevent a specific and required interaction between hTR and hTERT. Rather than attempting to disrupt all of the individual hTR-hTERT interactions, we focused the screen on the interaction of the CR4-CR5 domain of hTR with hTERT. The screen employs a biotin-labeled derivative of the CR4-CR5 domain of hTR that independently binds [(35)S]hTERT in a functionally relevant manner. The complex between hTERT and biotin-labeled RNA can be captured on streptavidin-coated scintillation proximity beads. Use of 96-well filter plates and a vacuum manifold enables rapid purification of the beads. After optimization, statistical evaluation of the screen generated a Z' factor of 0.6, demonstrating the high precision of the assay." @default.
- W2001349198 created "2016-06-24" @default.
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- W2001349198 date "2006-06-01" @default.
- W2001349198 modified "2023-09-25" @default.
- W2001349198 title "A high-throughput assay for a human telomerase protein–human telomerase RNA interaction" @default.
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- W2001349198 doi "https://doi.org/10.1016/j.ab.2006.03.027" @default.
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