Abstract:Several rRNA modifying enzymes install rRNA modifications while participating in ribosome assembly. Here, we show that 18S rRNA methyltransferase DIMT1 is essential for acute myeloid leukemia (AML) proliferation through a non-catalytic function. We reveal that targeting a positively charged cleft of DIMT1, remote from the catalytic site, weakens the binding of DIMT1 to rRNA and mis-localizes DIMT1 to the nucleoplasm, in contrast with the primarily nucleolar localization of wild-type DIMT1. Mechanistically, rRN… Show more
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