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| | <StructureSection load='4wu8' size='340' side='right'caption='[[4wu8]], [[Resolution|resolution]] 2.45Å' scene=''> | | <StructureSection load='4wu8' size='340' side='right'caption='[[4wu8]], [[Resolution|resolution]] 2.45Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4wu8]] is a 10 chain structure with sequence from [http://en.wikipedia.org/wiki/African_clawed_frog African clawed frog]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4WU8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4WU8 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4wu8]] is a 10 chain structure with sequence from [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=4WU8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4WU8 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CX3:[2-(3-{BIS[2-(AMINO-KAPPAN)ETHYL]AMINO-KAPPAN}PROPYL)-1H-BENZO[DE]ISOQUINOLINE-1,3(2H)-DIONATO(2-)]PLATINUM(1+)'>CX3</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CX3:[2-(3-{BIS[2-(AMINO-KAPPAN)ETHYL]AMINO-KAPPAN}PROPYL)-1H-BENZO[DE]ISOQUINOLINE-1,3(2H)-DIONATO(2-)]PLATINUM(1+)'>CX3</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4wu9|4wu9]]</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=4wu8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wu8 OCA], [https://pdbe.org/4wu8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4wu8 RCSB], [https://www.ebi.ac.uk/pdbsum/4wu8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4wu8 ProSAT]</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=4wu8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4wu8 OCA], [http://pdbe.org/4wu8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4wu8 RCSB], [http://www.ebi.ac.uk/pdbsum/4wu8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4wu8 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[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. [[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/H2A1_XENLA H2A1_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/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. |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: African clawed frog]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Chua, E Y.D]] | + | [[Category: Synthetic construct]] |
| - | [[Category: Davey, C A]] | + | [[Category: Xenopus laevis]] |
| - | [[Category: Structural protein-dna complex]] | + | [[Category: Chua EYD]] |
| | + | [[Category: Davey CA]] |
| Structural highlights
Function
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.
Publication Abstract from PubMed
Platinum-based anticancer drugs act therapeutically by forming DNA adducts, but suffer from severe toxicity and resistance problems, which have not been overcome in spite of decades of research. And yet defined chromatin targets have generally not been considered in the drug development process. Here we designed novel platinum-intercalator species to target a highly deformed DNA site near the nucleosome center. Between two seemingly similar structural isomers, we find a striking difference in DNA site selectivity in vitro, which comes about from stereochemical constraints that limit the reactivity of the trans isomer to special DNA sequence elements while still allowing the cis isomer to efficiently form adducts at internal sites in the nucleosome core. This gives the potential for controlling nucleosome site targeting in vivo, which would engender sensitivity to epigenetic distinctions and in particular cell type/status-dependent differences in nucleosome positioning. Moreover, while both compounds yield very similar DNA-adduct structures and display antitumor cell activity rivalling that of cisplatin, the cis isomer, relative to the trans, has a much more rapid cytotoxic effect and distinct impact on cell function. The novel stereochemical principles for controlling DNA site selectivity we discovered could aid in the design of improved site discriminating agents.
Stereochemical control of nucleosome targeting by platinum-intercalator antitumor agents.,Chua EY, Davey GE, Chin CF, Droge P, Ang WH, Davey CA Nucleic Acids Res. 2015 Jun 23;43(11):5284-96. doi: 10.1093/nar/gkv356. Epub 2015, Apr 27. PMID:25916851[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Chua EY, Davey GE, Chin CF, Droge P, Ang WH, Davey CA. Stereochemical control of nucleosome targeting by platinum-intercalator antitumor agents. Nucleic Acids Res. 2015 Jun 23;43(11):5284-96. doi: 10.1093/nar/gkv356. Epub 2015, Apr 27. PMID:25916851 doi:http://dx.doi.org/10.1093/nar/gkv356
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