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3t6r

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Revision as of 11:05, 5 August 2016

Structure of UHRF1 in complex with unmodified H3 N-terminal tail

Structural highlights

3t6r is a 3 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[UHRF1_HUMAN] Note=Defects in UHRF1 may be a cause of cancers. Overexpressed in many different forms of human cancers, including bladder, breast, cervical, colorectal and prostate cancers, as well as pancreatic adenocarcinomas, rhabdomyosarcomas and gliomas. Plays an important role in the correlation of histone modification and gene silencing in cancer progression. Expression is associated with a poor prognosis in patients with various cancers, suggesting that it participates in cancer progression.

Function

[UHRF1_HUMAN] Multidomain protein that acts as a key epigenetic regulator by bridging DNA methylation and chromatin modification. Specifically recognizes and binds hemimethylated DNA at replication forks via its YDG domain and recruits DNMT1 methyltransferase to ensure faithful propagation of the DNA methylation patterns through DNA replication. In addition to its role in maintenance of DNA methylation, also plays a key role in chromatin modification: through its tudor-like regions and PHD-type zinc fingers, specifically recognizes and binds histone H3 trimethylated at 'Lys-9' (H3K9me3) and unmethylated at 'Arg-2' (H3R2me0), respectively, and recruits chromatin proteins. Enriched in pericentric heterochromatin where it recruits different chromatin modifiers required for this chromatin replication. Also localizes to euchromatic regions where it negatively regulates transcription possibly by impacting DNA methylation and histone modifications. Has E3 ubiquitin-protein ligase activity by mediating the ubiquitination of target proteins such as histone H3 and PML. It is still unclear how E3 ubiquitin-protein ligase activity is related to its role in chromatin in vivo. May be involved in DNA repair.^[1] ^[2] ^[3] ^[4] ^[5] ^[6] ^[7] ^[8] ^[9] [H31T_HUMAN] 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

Human multi-domain-containing protein UHRF1 has recently been extensively characterized as a key epigenetic regulator for maintaining DNA methylation patterns. UHRF1 SRA domain preferentially binds to hemimethylated CpG sites, and double Tudor domain has been implicated in recognizing H3K9me3 mark, but the role of the adjacent PHD finger remains unclear. Here, we report the high-resolution crystal structure of UHRF1 PHD finger in complex with N-terminal tail of histone H3. We found that the preceding zinc-Cys4 knuckle is indispensable for the PHD finger of UHRF1 to recognize the first four unmodified residues of histone H3 N-terminal tail. Quantitative binding studies indicated that UHRF1 PHD finger (including the preceding zinc-Cys4 knuckle) acts together with the adjacent double Tudor domain to specifically recognize the H3K9me3 mark. Combinatorial recognition of H3K9me3-containing histone H3 tail by UHRF1 PHD finger and double Tudor domain may play a role in establishing and maintaining histone H3K9 methylation patterns during the cell cycle.

UHRF1 double tudor domain and the adjacent PHD finger act together to recognize K9me3-containing histone H3 tail.,Xie S, Jakoncic J, Qian C J Mol Biol. 2012 Jan 13;415(2):318-28. Epub 2011 Nov 12. PMID:22100450^[10]

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

References

↑ Hopfner R, Mousli M, Jeltsch JM, Voulgaris A, Lutz Y, Marin C, Bellocq JP, Oudet P, Bronner C. ICBP90, a novel human CCAAT binding protein, involved in the regulation of topoisomerase IIalpha expression. Cancer Res. 2000 Jan 1;60(1):121-8. PMID:10646863
↑ Arima Y, Hirota T, Bronner C, Mousli M, Fujiwara T, Niwa S, Ishikawa H, Saya H. Down-regulation of nuclear protein ICBP90 by p53/p21Cip1/WAF1-dependent DNA-damage checkpoint signals contributes to cell cycle arrest at G1/S transition. Genes Cells. 2004 Feb;9(2):131-42. PMID:15009091
↑ Unoki M, Nishidate T, Nakamura Y. ICBP90, an E2F-1 target, recruits HDAC1 and binds to methyl-CpG through its SRA domain. Oncogene. 2004 Oct 7;23(46):7601-10. PMID:15361834 doi:10.1038/sj.onc.1208053
↑ Bostick M, Kim JK, Esteve PO, Clark A, Pradhan S, Jacobsen SE. UHRF1 plays a role in maintaining DNA methylation in mammalian cells. Science. 2007 Sep 21;317(5845):1760-4. Epub 2007 Aug 2. PMID:17673620 doi:10.1126/science.1147939
↑ Karagianni P, Amazit L, Qin J, Wong J. ICBP90, a novel methyl K9 H3 binding protein linking protein ubiquitination with heterochromatin formation. Mol Cell Biol. 2008 Jan;28(2):705-17. Epub 2007 Oct 29. PMID:17967883 doi:10.1128/MCB.01598-07
↑ Kim JK, Esteve PO, Jacobsen SE, Pradhan S. UHRF1 binds G9a and participates in p21 transcriptional regulation in mammalian cells. Nucleic Acids Res. 2009 Feb;37(2):493-505. doi: 10.1093/nar/gkn961. Epub 2008 Dec, 4. PMID:19056828 doi:10.1093/nar/gkn961
↑ Felle M, Joppien S, Nemeth A, Diermeier S, Thalhammer V, Dobner T, Kremmer E, Kappler R, Langst G. The USP7/Dnmt1 complex stimulates the DNA methylation activity of Dnmt1 and regulates the stability of UHRF1. Nucleic Acids Res. 2011 Oct;39(19):8355-65. doi: 10.1093/nar/gkr528. Epub 2011, Jul 10. PMID:21745816 doi:10.1093/nar/gkr528
↑ Guan D, Factor D, Liu Y, Wang Z, Kao HY. The epigenetic regulator UHRF1 promotes ubiquitination-mediated degradation of the tumor-suppressor protein promyelocytic leukemia protein. Oncogene. 2012 Sep 3. doi: 10.1038/onc.2012.406. PMID:22945642 doi:10.1038/onc.2012.406
↑ Rajakumara E, Wang Z, Ma H, Hu L, Chen H, Lin Y, Guo R, Wu F, Li H, Lan F, Shi YG, Xu Y, Patel DJ, Shi Y. PHD Finger Recognition of Unmodified Histone H3R2 Links UHRF1 to Regulation of Euchromatic Gene Expression. Mol Cell. 2011 Jul 22;43(2):275-84. PMID:21777816 doi:10.1016/j.molcel.2011.07.006
↑ Xie S, Jakoncic J, Qian C. UHRF1 double tudor domain and the adjacent PHD finger act together to recognize K9me3-containing histone H3 tail. J Mol Biol. 2012 Jan 13;415(2):318-28. Epub 2011 Nov 12. PMID:22100450 doi:10.1016/j.jmb.2011.11.012

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3t6r"

@@ Line 1: / Line 1: @@
 ==Structure of UHRF1 in complex with unmodified H3 N-terminal tail==
 <StructureSection load='3t6r' size='340' side='right' caption='[[3t6r]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3t6r]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3T6R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3T6R FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3t6r]] is a 3 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=3T6R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3T6R FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=3t6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t6r OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3t6r RCSB], [http://www.ebi.ac.uk/pdbsum/3t6r PDBsum]</span></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=3t6r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t6r OCA], [http://pdbe.org/3t6r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3t6r RCSB], [http://www.ebi.ac.uk/pdbsum/3t6r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3t6r ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 18: / Line 19: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 3t6r" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 25: / Line 27: @@
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: Jakoncic, J]]
 [[Category: Qian, C M]]

3t6r

From Proteopedia

Revision as of 11:05, 5 August 2016

Structure of UHRF1 in complex with unmodified H3 N-terminal tail

Structural highlights

Disease

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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