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| | <SX load='6o96' size='340' side='right' viewer='molstar' caption='[[6o96]], [[Resolution|resolution]] 3.50Å' scene=''> | | <SX load='6o96' size='340' side='right' viewer='molstar' caption='[[6o96]], [[Resolution|resolution]] 3.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6o96]] is a 12 chain structure with sequence from [http://en.wikipedia.org/wiki/ ], [http://en.wikipedia.org/wiki/African_clawed_frog African clawed frog] and [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6O96 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6O96 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6o96]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens], [https://en.wikipedia.org/wiki/Xenopus_laevis Xenopus laevis] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6O96 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6O96 FirstGlance]. <br> |
| | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene></td></tr> | | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">hist1h2aj, LOC494591, XELAEV_18003602mg ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=8355 African clawed frog]), DOT1L, KIAA1814, KMT4 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), UBB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6o96 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6o96 OCA], [https://pdbe.org/6o96 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6o96 RCSB], [https://www.ebi.ac.uk/pdbsum/6o96 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6o96 ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Histone-lysine_N-methyltransferase Histone-lysine N-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.43 2.1.1.43] </span></td></tr>
| + | |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6o96 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6o96 OCA], [http://pdbe.org/6o96 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6o96 RCSB], [http://www.ebi.ac.uk/pdbsum/6o96 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6o96 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/DOT1L_HUMAN DOT1L_HUMAN]] Histone methyltransferase. Methylates 'Lys-79' of histone H3. Nucleosomes are preferred as substrate compared to free histones. Binds to DNA. [[http://www.uniprot.org/uniprot/H4_XENLA 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. [[http://www.uniprot.org/uniprot/H32_XENLA 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. [[http://www.uniprot.org/uniprot/H2B11_XENLA 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. | + | [https://www.uniprot.org/uniprot/H32_XENLA 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. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </SX> | | </SX> |
| - | [[Category: African clawed frog]] | + | [[Category: Homo sapiens]] |
| - | [[Category: Histone-lysine N-methyltransferase]]
| + | |
| - | [[Category: Human]]
| + | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Armache, J P]] | + | [[Category: Synthetic construct]] |
| - | [[Category: Armache, K J]] | + | [[Category: Xenopus laevis]] |
| - | [[Category: Chen, R]] | + | [[Category: Armache J-P]] |
| - | [[Category: Ioannes, P E.De]] | + | [[Category: Armache K-J]] |
| - | [[Category: Miao, W]] | + | [[Category: Chen R]] |
| - | [[Category: Nudler, E]] | + | [[Category: De Ioannes PE]] |
| - | [[Category: Valencia-Sanchez, M I]] | + | [[Category: Miao W]] |
| - | [[Category: Vasilyev, N]] | + | [[Category: Nudler E]] |
| - | [[Category: Chromatin modifier]]
| + | [[Category: Valencia-Sanchez MI]] |
| - | [[Category: Complex]]
| + | [[Category: Vasilyev N]] |
| - | [[Category: Structural protein]]
| + | |
| - | [[Category: Structural protein-dna-transferase complex]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
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.
Publication Abstract from PubMed
The essential histone H3 lysine 79 methyltransferase Dot1L regulates transcription and genomic stability and is deregulated in leukemia. The activity of Dot1L is stimulated by mono-ubiquitination of histone H2B on lysine 120 (H2BK120Ub); however, the detailed mechanism is not understood. We report cryo-EM structures of human Dot1L bound to (1) H2BK120Ub and (2) unmodified nucleosome substrates at 3.5 A and 4.9 A, respectively. Comparison of both structures, complemented with biochemical experiments, provides critical insights into the mechanism of Dot1L stimulation by H2BK120Ub. Both structures show Dot1L binding to the same extended surface of the histone octamer. In yeast, this surface is used by silencing proteins involved in heterochromatin formation, explaining the mechanism of their competition with Dot1. These results provide a strong foundation for understanding conserved crosstalk between histone modifications found at actively transcribed genes and offer a general model of how ubiquitin might regulate the activity of chromatin enzymes.
Structural Basis of Dot1L Stimulation by Histone H2B Lysine 120 Ubiquitination.,Valencia-Sanchez MI, De Ioannes P, Wang M, Vasilyev N, Chen R, Nudler E, Armache JP, Armache KJ Mol Cell. 2019 Apr 8. pii: S1097-2765(19)30233-3. doi:, 10.1016/j.molcel.2019.03.029. PMID:30981630[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Valencia-Sanchez MI, De Ioannes P, Wang M, Vasilyev N, Chen R, Nudler E, Armache JP, Armache KJ. Structural Basis of Dot1L Stimulation by Histone H2B Lysine 120 Ubiquitination. Mol Cell. 2019 Apr 8. pii: S1097-2765(19)30233-3. doi:, 10.1016/j.molcel.2019.03.029. PMID:30981630 doi:http://dx.doi.org/10.1016/j.molcel.2019.03.029
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