Yuan W, et al. (2009) Heterogeneous Nuclear Ribonucleoprotein L Is a Subunit of Human KMT3a/Set2 Complex Required for H3 Lys-36 Trimethylation Activity in Vivo. J Biol Chem 284(23):15701-7
Abstract: The presence of histone H3 lysine 36 methylation (H3K36me) correlates with actively transcribed genes. In yeast, histone H3K36me mediated by KMT3 (also known as Set2) recruits a histone deacetylase complex, Rpd3s, to ensure the fidelity of transcription initiation. We report the purification of human KMT3a (also known as HYPB or hSet2) complex and the identification of a novel, higher eukaryotic specific subunit, heterogeneous nuclear ribonucleoprotein L (HnRNP-L). Interestingly, although KMT3a has intrinsic activity in vitro, HnRNP-L is essential in vivo. Moreover, KMT3a generates mono-, di- and tri-methylated products in vitro, but RNAi against KMT3a or HnRNP-L down-regulates exclusively the H3K36me3 mark in vivo.
|Status: Published||Type: Journal Article||PubMed ID: 19332550|
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