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Small Molecule Modulation of the Human Chromatid Decatenation Checkpoint

Small Molecule Modulation of the Human Chromatid Decatenation Checkpoint

Stephen J Haggarty, Kathryn M Koeller, Tweeny R Kau, Pamela A Silver, Michel Roberge, Stuart L Schreiber

Chem Biol. 2003 Dec;10(12):1267-79.

PMID: 14700634

Abstract:

After chromosome replication, the intertwined sister chromatids are disentangled by topoisomerases. The integrity of this process is monitored by the chromatid decatenation checkpoint. Here, we describe small molecule modulators of the human chromatid decatenation checkpoint identified using a cell-based, chemical genetic modifier screen. Similar to 1,2,7-trimethylyxanthine (caffeine), these small molecules suppress the G(2)-phase arrest caused by ICRF-193, a small molecule inhibitor of the enzymatic activity of topoisomerase II. Analysis of specific suppressors, here named suptopins for suppressor of Topoisomerase II inhibition, revealed distinct effects on cell cycle progression, microtubule stability, nucleocytoplasmic transport of cyclin B1, and no effect on the chromatin deacetylation checkpoint induced by trichostatin A. The suptopins provide new molecular tools for dissecting the role of topoisomerases in maintaining genomic stability and determining whether inhibiting the chromatid decatenation checkpoint sensitizes tumor cells to chemotherapeutics.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP331852665	Suptopin-2		331852-66-5	Price

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