6jm9

cryo-EM structure of DOT1L bound to unmodified nucleosome

spinqualitylabelsall models 6jm9, resolution 7.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6jm9 is a 11 chain structure with sequence from [1], African clawed frog and Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: SAM Gene: hist1h2aj, LOC494591, XELAEV_18003602mg (African clawed frog), DOT1L (HUMAN) Activity: Histone-lysine N-methyltransferase, with EC number 2.1.1.43 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [H2B11_XENLA] Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling. [H4_XENLA] Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling. [H32_XENLA] Core component of nucleosome. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling. [DOT1L_HUMAN] Histone methyltransferase. Methylates 'Lys-79' of histone H3. Nucleosomes are preferred as substrate compared to free histones. Binds to DNA. Publication Abstract from PubMed DOT1L is a histone H3 Lys79 methyltransferase whose activity is stimulated by histone H2B Lys120 ubiquitination, suggesting cross-talk between histone H3 methylation and H2B ubiquitination. Here, we present cryo-EM structures of DOT1L complexes with unmodified or H2B ubiquitinated nucleosomes, showing that DOT1L recognizes H2B ubiquitin and the H2A/H2B acidic patch through a C-terminal hydrophobic helix and an arginine anchor in DOT1L, respectively. Furthermore, the structures combined with single-molecule FRET experiments show that H2B ubiquitination enhances a noncatalytic function of the DOT1L-destabilizing nucleosome. These results establish the molecular basis of the cross-talk between H2B ubiquitination and H3 Lys79 methylation as well as nucleosome destabilization by DOT1L. Structural basis of recognition and destabilization of the histone H2B ubiquitinated nucleosome by the DOT1L histone H3 Lys79 methyltransferase.,Jang S, Kang C, Yang HS, Jung T, Hebert H, Chung KY, Kim SJ, Hohng S, Song JJ Genes Dev. 2019 Mar 28. pii: gad.323790.118. doi: 10.1101/gad.323790.118. PMID:30923167 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Histone 3D structures Histone methyltransferase 3D structures

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