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==Structure of SETD3 bound to SAH and unmodified actin==
==Structure of SETD3 bound to SAH and unmodified actin==
<StructureSection load='6icv' size='340' side='right' caption='[[6icv]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
<StructureSection load='6icv' size='340' side='right'caption='[[6icv]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[6icv]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6ICV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6ICV FirstGlance]. <br>
<table><tr><td colspan='2'>[[6icv]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6ICV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6ICV 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></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.15&#8491;</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='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='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=6icv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6icv OCA], [http://pdbe.org/6icv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6icv RCSB], [http://www.ebi.ac.uk/pdbsum/6icv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6icv ProSAT]</span></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=6icv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6icv OCA], [https://pdbe.org/6icv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6icv RCSB], [https://www.ebi.ac.uk/pdbsum/6icv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6icv ProSAT]</span></td></tr>
</table>
</table>
== Disease ==
[[http://www.uniprot.org/uniprot/ACTB_HUMAN ACTB_HUMAN]] Defects in ACTB are a cause of dystonia juvenile-onset (DYTJ) [MIM:[http://omim.org/entry/607371 607371]]. DYTJ is a form of dystonia with juvenile onset. Dystonia is defined by the presence of sustained involuntary muscle contraction, often leading to abnormal postures. DYTJ patients manifest progressive, generalized, dopa-unresponsive dystonia, developmental malformations and sensory hearing loss.<ref>PMID:16685646</ref>  Defects in ACTB are the cause of Baraitser-Winter syndrome type 1 (BRWS1) [MIM:[http://omim.org/entry/243310 243310]]. A rare developmental disorder characterized by the combination of congenital ptosis, high-arched eyebrows, hypertelorism, ocular colobomata, and a brain malformation consisting of anterior-predominant lissencephaly. Other typical features include postnatal short stature and microcephaly, intellectual disability, seizures, and hearing loss.<ref>PMID:22366783</ref> 
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/SETD3_HUMAN SETD3_HUMAN]] Histone methyltransferase that methylates 'Lys-36' of histone H3 (H3K36me). H3 'Lys-36' methylation represents a specific tag for epigenetic transcriptional activation (By similarity). [[http://www.uniprot.org/uniprot/ACTB_HUMAN ACTB_HUMAN]] Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells.
[https://www.uniprot.org/uniprot/SETD3_HUMAN SETD3_HUMAN] Histone methyltransferase that methylates 'Lys-36' of histone H3 (H3K36me). H3 'Lys-36' methylation represents a specific tag for epigenetic transcriptional activation (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
SETD3 is a member of the SET (Su(var)3-9, Enhancer of zeste, and Trithorax) domain protein superfamily and plays important roles in hypoxic pulmonary hypertension, muscle differentiation, and carcinogenesis. Previously, we identified SETD3 as the actin-specific methyltransferase that methylates the N3 of His73 on beta-actin (Kwiatkowski et al., 2018). Here, we present two structures of S-adenosyl-L-homocysteine-bound SETD3 in complex with either an unmodified beta-actin peptide or its His-methylated variant. Structural analyses, supported by biochemical experiments and enzyme activity assays, indicate that the recognition and methylation of beta-actin by SETD3 are highly sequence specific, and that both SETD3 and beta-actin adopt pronounced conformational changes upon binding to each other. In conclusion, this study is the first to show a catalytic mechanism of SETD3-mediated histidine methylation on beta-actin, which not only throws light on the protein histidine methylation phenomenon but also facilitates the design of small molecule inhibitors of SETD3.
 
Structural insights into SETD3-mediated histidine methylation on beta-actin.,Guo Q, Liao S, Kwiatkowski S, Tomaka W, Yu H, Wu G, Tu X, Min J, Drozak J, Xu C Elife. 2019 Feb 20;8. pii: 43676. doi: 10.7554/eLife.43676. PMID:30785395<ref>PMID:30785395</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6icv" style="background-color:#fffaf0;"></div>
 
==See Also==
*[[Histone methyltransferase 3D structures|Histone methyltransferase 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Histone-lysine N-methyltransferase]]
[[Category: Homo sapiens]]
[[Category: Guo, Q]]
[[Category: Large Structures]]
[[Category: Liao, S]]
[[Category: Guo Q]]
[[Category: Xu, C]]
[[Category: Liao S]]
[[Category: Histidine methylatransferase]]
[[Category: Xu C]]
[[Category: Protein binding]]

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