Loss of DOT1L disrupts neuronal transcription, behavior, and leads to a neurodevelopmental disorder.

ABSTRACT: Individuals with monoallelic gain-of-function variants in the histone lysine methyltransferase DOT1L display global developmental delay and varying congenital anomalies. However, the impact of monoallelic loss of DOT1L remains unclear. Here, we sought to define the effects of partial DOT1L loss by applying bulk and single-nucleus RNA-sequencing, ChIP-sequencing, imaging, multielectrode array recordings, and behavioral analysis of zebrafish and multiple mouse models. We present a cohort of 16 individuals (12 females, 4 males) with neurodevelopmental disorders and monoallelic DOT1L variants, including a frameshift deletion, an in-frame deletion, a nonsense, and missense variants clustered in the catalytic domain. We demonstrate that specific variants cause loss of methyltransfe

SUBMITTER: Maroni MJ 

PROVIDER: S-EPMC11581099 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature