Allele-specific gene regulation by KDM6A
Ma, W.; Fang, H.; Pease, N.; Filippova, G.; Disteche, C.; Berletch, J.
Show abstract
KDM6A demethylates the repressive histone mark H3K27me3 and thus plays an important role in developmental gene regulation. KDM6A expression is female-biased due to escape from X inactivation, suggesting that this protein may play a role in sex differences. Here, we report that maternal and paternal alleles of a subset of mouse genes are differentially regulated by KDM6A. Knockouts of Kdm6a in male and female embryonic stem cells derived from F1 hybrid mice from reciprocal interspecific crosses resulted in preferential downregulation of maternal alleles of a number of genes implicated in development. Moreover, the majority of these genes exhibited a maternal allele expression bias, which was observed in both reciprocal crosses. Promoters of genes downregulated on maternal but not paternal alleles demonstrated a loss of chromatin accessibility, while the expected increase in H3K27me3 levels occurred only at promoters of genes downregulated on paternal but not maternal alleles. These results illustrate parent-of-origin mechanisms of gene regulation by KDM6A, consistent with histone demethylation-dependent and -independent activities.
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