Topic
JARID1B
About: JARID1B is a research topic. Over the lifetime, 182 publications have been published within this topic receiving 15362 citations. The topic is also known as: CT31 & JARID1B.
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TL;DR: The JmjC domain is identified as a novel demethylase signature motif and a protein demethylation mechanism that is conserved from yeast to human is uncovered.
Abstract: Covalent modification of histones has an important role in regulating chromatin dynamics and transcription. Whereas most covalent histone modifications are reversible, until recently it was unknown whether methyl groups could be actively removed from histones. Using a biochemical assay coupled with chromatography, we have purified a novel JmjC domain-containing protein, JHDM1 (JmjC domain-containing histone demethylase 1), that specifically demethylates histone H3 at lysine 36 (H3-K36). In the presence of Fe(ii) and alpha-ketoglutarate, JHDM1 demethylates H3-methyl-K36 and generates formaldehyde and succinate. Overexpression of JHDM1 reduced the level of dimethyl-H3-K36 (H3K36me2) in vivo. The demethylase activity of the JmjC domain-containing proteins is conserved, as a JHDM1 homologue in Saccharomyces cerevisiae also has H3-K36 demethylase activity. Thus, we identify the JmjC domain as a novel demethylase signature motif and uncover a protein demethylation mechanism that is conserved from yeast to human.
1,993 citations
TL;DR: It is shown that CoREST endows LSD1 with the ability to demethylate nucleosomal substrates and that it protects LSD1 from proteasomal degradation in vivo, suggesting that hypoacetylated nucleosomes may be the preferred physiological substrate.
827 citations
TL;DR: This work identifies a histone demethylase and links its function to hormone-dependent transcriptional activation, resulting in H3K9 demethylation and transcriptionalactivation.
789 citations
TL;DR: The discovery of this DNA demethylase should provide a basis for the molecular and developmental analysis of the role of DNA methylation and demethylation.
Abstract: DNA-methylation patterns are important for regulating genome functions, and are determined by the enzymatic processes of methylation and demethylation. The demethylating enzyme has now been identified: a mammalian complementary DNA encodes a methyl-CpG-binding domain, bears a demethylase activity that transforms methylated cytosine bases to cytosine, and demethylates a plasmid when the cDNA is translated or transiently transfected into human embryonal kidney cells in vitro. The discovery of this DNA demethylase should provide a basis for the molecular and developmental analysis of the role of DNA methylation and demethylation.
662 citations
TL;DR: A family of H3K4me3 demethylases are identified and a critical link between histone modifications and XLMR is uncovered, uncovering a role for SMCX in neuronal survival and dendritic development and a link to the demethylase activity.
650 citations