Journal
ACS MEDICINAL CHEMISTRY LETTERS
Volume 12, Issue 6, Pages 887-892Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmedchemlett.0c00193
Keywords
Acetyltransferase; pan-assay interference; chemical probes; RNA modification; NAT10; Hutchinson-Gilford Progeria Syndrome
Categories
Funding
- Intramural Research Program of NIH
- National Cancer Institute
- Center for Cancer Research [ZIA BC011488-04]
- NHLBI [JLD T32HL007627]
- NIGMS [R35 GM118090]
- AbbVie [1097737]
- Bayer Pharma AG
- Boehringer Ingelheim
- Canada Foundation for Innovation
- Eshelman Institute for Innovation
- Genome Canada through Ontario Genomics Institute [OGI-055]
- Innovative Medicines Initiative (EU/EFPIA) [ULTRA-DD] [115766]
- Janssen
- Merck KGaA
- Darmstadt, Germany
- MSD
- Novartis Pharma AG
- Pfizer
- Sao Paulo Research Foundation-FAPESP
- Takeda
- Wellcome
- National Cancer Institute, National Institutes of Health [HHSN261200800001E]
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Remodelin, a putative small molecule inhibitor of RNA acetyltransferase NAT10, was found to be a cryptic assay interference compound that interacts with multiple protein targets in cells and does not affect the formation of ac4C. Biophysical analyses did not show direct evidence of interaction between remodelin and the NAT10 acetyltransferase active site.
Remodelin is a putative small molecule inhibitor of the RNA acetyltransferase NAT10 which has shown preclinical efficacy in models of the premature aging disease Hutchinson-Gilford Progeria Syndrome (HGPS). Here we evaluate remodelin's assay interference characteristics and effects on NAT10-catalyzed RNA cytidine acetylation. We find the remodelin chemotype constitutes a cryptic assay interference compound, which does not react with small molecule thiols but demonstrates protein reactivity in ALARM NMR and proteome-wide affinity profiling assays. Biophysical analyses find no direct evidence for interaction of remodelin with the NAT10 acetyltransferase active site. Cellular studies verify that N4-acetylcytidine (ac4C) is a nonredundant target of NAT10 activity in human cell lines and find that this RNA modification is not affected by remodelin treatment in several orthogonal assays. These studies display the potential for remodelin's chemotype to interact with multiple protein targets in cells and indicate remodelin should not be applied as a specific chemical inhibitor of NAT10-catalyzed RNA acetylation.
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