Journal
ACS MEDICINAL CHEMISTRY LETTERS
Volume 14, Issue 4, Pages 450-457Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmedchemlett.2c00537
Keywords
U2AF homology motif; RNA binding protein; splicing factor; binding site analysis; homogenous time resolved fluorescence assay; small-molecule inhibitors
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RNA splicing is a crucial biological process involving the removal of introns and joining of exons to generate mature mRNA. Mutations in splicing factors containing the UHM domain are frequently observed in myeloid neoplasms. Our study aimed to assess the binding activities between UHM domains and ULM peptides, as well as small-molecule inhibitors, to guide the development of selective UHM domain inhibitors in the future.
RNA splicing is a biological process to generate mature mRNA (mRNA) by removing introns and annexing exons in the nascent RNA transcript and is executed by a multiprotein complex called spliceosome. To aid RNA splicing, a class of splicing factors use an atypical RNA recognition domain (UHM) to bind with U2AF ligand motifs (ULMs) in proteins to form modules that recognize splice sites and splicing regulatory elements on mRNA. Mutations of UHM containing splicing factors have been found frequently in myeloid neoplasms. To profile the selectivity of UHMs for inhibitor development, we established binding assays to measure the binding activities between UHM domains and ULM peptides and a set of small-molecule inhibitors. Additionally, we computationally analyzed the targeting potential of the UHM domains by small-molecule inhibitors. Our study provided the binding assessment of UHM domains to diverse ligands that may guide development of selective UHM domain inhibitors in the future.
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