5t0m

From Proteopedia

(Difference between revisions)

Revision as of 09:21, 4 December 2019

A histone H3K9M mutation traps histone methyltransferase Clr4 to prevent heterochromatin spreading

Structural highlights

5t0m is a 4 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
NonStd Res:
Related:	5t0k
Gene:	EHMT2, BAT8, C6orf30, G9A, KMT1C, NG36 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[EHMT2_HUMAN] Histone methyltransferase that specifically mono- and dimethylates 'Lys-9' of histone H3 (H3K9me1 and H3K9me2, respectively) in euchromatin. H3K9me represents a specific tag for epigenetic transcriptional repression by recruiting HP1 proteins to methylated histones. Also mediates monomethylation of 'Lys-56' of histone H3 (H3K56me1) in G1 phase, leading to promote interaction between histone H3 and PCNA and regulating DNA replication. Also weakly methylates 'Lys-27' of histone H3 (H3K27me). Also required for DNA methylation, the histone methyltransferase activity is not required for DNA methylation, suggesting that these 2 activities function independently. Probably targeted to histone H3 by different DNA-binding proteins like E2F6, MGA, MAX and/or DP1. May also methylate histone H1. In addition to the histone methyltransferase activity, also methylates non-histone proteins: mediates dimethylation of 'Lys-373' of p53/TP53. Also methylates CDYL, WIZ, ACIN1, DNMT1, HDAC1, ERCC6, KLF12 and itself.^[1] ^[2] ^[3] ^[4] ^[5]

Publication Abstract from PubMed

Histone lysine-to-methionine (K-to-M) mutations are associated with multiple cancers, and they function in a dominant fashion to block the methylation of corresponding lysines on wild type histones. However, their mechanisms of function are controversial. Here we show that in fission yeast, introducing the K9M mutation into one of the three histone H3 genes dominantly blocks H3K9 methylation on wild type H3 across the genome. In addition, H3K9M enhances the interaction of histone H3 tail with the H3K9 methyltransferase Clr4 in a SAM (S-adenosyl-methionine)-dependent manner, and Clr4 is trapped at nucleation sites to prevent its spreading and the formation of large heterochromatin domains. We further determined the crystal structure of an H3K9M peptide in complex with human H3K9 methyltransferase G9a and SAM, which reveales that the methionine side chain had enhanced van der Waals interactions with G9a. Therefore, our results provide a detailed mechanism by which H3K9M regulates H3K9 methylation.

A histone H3K9M mutation traps histone methyltransferase Clr4 to prevent heterochromatin spreading.,Shan CM, Wang J, Xu K, Chen H, Yue JX, Andrews S, Moresco JJ, Yates JR, Nagy PL, Tong L, Jia S Elife. 2016 Sep 20;5. pii: e17903. doi: 10.7554/eLife.17903. PMID:27648579^[6]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Milner CM, Campbell RD. The G9a gene in the human major histocompatibility complex encodes a novel protein containing ankyrin-like repeats. Biochem J. 1993 Mar 15;290 ( Pt 3):811-8. PMID:8457211
↑ Tachibana M, Sugimoto K, Fukushima T, Shinkai Y. Set domain-containing protein, G9a, is a novel lysine-preferring mammalian histone methyltransferase with hyperactivity and specific selectivity to lysines 9 and 27 of histone H3. J Biol Chem. 2001 Jul 6;276(27):25309-17. Epub 2001 Apr 20. PMID:11316813 doi:10.1074/jbc.M101914200
↑ Rathert P, Dhayalan A, Murakami M, Zhang X, Tamas R, Jurkowska R, Komatsu Y, Shinkai Y, Cheng X, Jeltsch A. Protein lysine methyltransferase G9a acts on non-histone targets. Nat Chem Biol. 2008 Jun;4(6):344-6. doi: 10.1038/nchembio.88. Epub 2008 Apr 27. PMID:18438403 doi:10.1038/nchembio.88
↑ Huang J, Dorsey J, Chuikov S, Zhang X, Jenuwein T, Reinberg D, Berger SL. G9A and GLP methylate lysine 373 in the tumor suppressor p53. J Biol Chem. 2010 Jan 29. PMID:20118233 doi:M109.062588
↑ Yu Y, Song C, Zhang Q, DiMaggio PA, Garcia BA, York A, Carey MF, Grunstein M. Histone H3 lysine 56 methylation regulates DNA replication through its interaction with PCNA. Mol Cell. 2012 Apr 13;46(1):7-17. doi: 10.1016/j.molcel.2012.01.019. Epub 2012, Mar 1. PMID:22387026 doi:10.1016/j.molcel.2012.01.019
↑ Shan CM, Wang J, Xu K, Chen H, Yue JX, Andrews S, Moresco JJ, Yates JR, Nagy PL, Tong L, Jia S. A histone H3K9M mutation traps histone methyltransferase Clr4 to prevent heterochromatin spreading. Elife. 2016 Sep 20;5. pii: e17903. doi: 10.7554/eLife.17903. PMID:27648579 doi:http://dx.doi.org/10.7554/eLife.17903

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5t0m"

@@ Line 1: / Line 1: @@
 ==A histone H3K9M mutation traps histone methyltransferase Clr4 to prevent heterochromatin spreading==
-<StructureSection load='5t0m' size='340' side='right' caption='[[5t0m]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
+<StructureSection load='5t0m' size='340' side='right'caption='[[5t0m]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5t0m]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5T0M OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5T0M FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5t0m]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5T0M OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5T0M FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene>, <scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
 <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=NLE:NORLEUCINE'>NLE</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5t0k|5t0k]]</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">EHMT2, BAT8, C6orf30, G9A, KMT1C, NG36 ([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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5t0m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5t0m OCA], [http://pdbe.org/5t0m PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5t0m RCSB], [http://www.ebi.ac.uk/pdbsum/5t0m PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5t0m ProSAT]</span></td></tr>
 </table>
@@ Line 20: / Line 21: @@
 </div>
 <div class="pdbe-citations 5t0m" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Histone methyltransferase 3D structures|Histone methyltransferase 3D structures]]
 == References ==
 <references/>
 __TOC__
 </StructureSection>
+[[Category: Human]]
+[[Category: Large Structures]]
 [[Category: Tong, L]]
 [[Category: Xu, K]]

5t0m

From Proteopedia

Revision as of 09:21, 4 December 2019

A histone H3K9M mutation traps histone methyltransferase Clr4 to prevent heterochromatin spreading

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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