Abstract:
:REV1 protein is a mutagenic DNA damage tolerance (DDT) mediator and encodes two ubiquitin-binding motifs (i.e., UBM1 and UBM2) that are essential for the DDT function. REV1 interacts with K164-monoubiquitinated PCNA (UbPCNA) in cells upon DNA-damaging stress. By using AlphaScreen assays to detect inhibition of REV1 and UbPCNA protein interactions along with an NMR-based strategy, we identified small-molecule compounds that inhibit the REV1/UbPCNA interaction and that directly bind to REV1 UBM2. In cells, one of the compound prevented recruitment of REV1 to PCNA foci on chromatin upon cisplatin treatment, delayed removal of UV-induced cyclopyrimidine dimers from nuclei, prevented UV-induced mutation of HPRT gene, and diminished clonogenic survival of cells that were challenged by cyclophosphamide or cisplatin. This study demonstrates the potential utility of a small-molecule REV1 UBM2 inhibitor for preventing DDT.
journal_name
Bioorg Med Chemjournal_title
Bioorganic & medicinal chemistryauthors
Vanarotti M,Evison BJ,Actis ML,Inoue A,McDonald ET,Shao Y,Heath RJ,Fujii Ndoi
10.1016/j.bmc.2018.03.028subject
Has Abstractpub_date
2018-05-15 00:00:00pages
2345-2353issue
9eissn
0968-0896issn
1464-3391pii
S0968-0896(18)30056-7journal_volume
26pub_type
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