3h8x

From Proteopedia

(Difference between revisions)

Revision as of 10:17, 4 August 2016

Structure determination of DNA methylation lesions N1-meA and N3-meC in duplex DNA using a cross-linked host-guest system

Structural highlights

3h8x 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.
NonStd Res:	,
Related:	3h8o, 3h8r
Gene:	ABH2, ALKBH2 (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[ALKB2_HUMAN] Dioxygenase that repairs alkylated DNA and RNA containing 1-methyladenine and 3-methylcytosine by oxidative demethylation. Can also repair alkylated DNA containing 1-ethenoadenine (in vitro). Has strong preference for double-stranded DNA. Has low efficiency with single-stranded substrates. Requires molecular oxygen, alpha-ketoglutarate and iron.^[1] ^[2] ^[3] ^[4] ^[5]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

N(1)-meA and N(3)-meC are cytotoxic DNA base methylation lesions that can accumulate in the genomes of various organisms in the presence of S(N)2 type methylating agents. We report here the structural characterization of these base lesions in duplex DNA using a cross-linked protein-DNA crystallization system. The crystal structure of N(1)-meA:T pair shows an unambiguous Hoogsteen base pair with a syn conformation adopted by N(1)-meA, which exhibits significant changes in the opening, roll and twist angles as compared to the normal A:T base pair. Unlike N(1)-meA, N(3)-meC does not establish any interaction with the opposite G, but remains partially intrahelical. Also, structurally characterized is the N(6)-meA base modification that forms a normal base pair with the opposite T in duplex DNA. Structural characterization of these base methylation modifications provides molecular level information on how they affect the overall structure of duplex DNA. In addition, the base pairs containing N(1)-meA or N(3)-meC do not share any specific characteristic properties except that both lesions create thermodynamically unstable regions in a duplex DNA, a property that may be explored by the repair proteins to locate these lesions.

Structure determination of DNA methylation lesions N1-meA and N3-meC in duplex DNA using a cross-linked protein-DNA system.,Lu L, Yi C, Jian X, Zheng G, He C Nucleic Acids Res. 2010 Jul;38(13):4415-25. Epub 2010 Mar 11. PMID:20223766^[6]

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

References

↑ Duncan T, Trewick SC, Koivisto P, Bates PA, Lindahl T, Sedgwick B. Reversal of DNA alkylation damage by two human dioxygenases. Proc Natl Acad Sci U S A. 2002 Dec 24;99(26):16660-5. Epub 2002 Dec 16. PMID:12486230 doi:10.1073/pnas.262589799
↑ Aas PA, Otterlei M, Falnes PO, Vagbo CB, Skorpen F, Akbari M, Sundheim O, Bjoras M, Slupphaug G, Seeberg E, Krokan HE. Human and bacterial oxidative demethylases repair alkylation damage in both RNA and DNA. Nature. 2003 Feb 20;421(6925):859-63. PMID:12594517 doi:10.1038/nature01363
↑ Lee DH, Jin SG, Cai S, Chen Y, Pfeifer GP, O'Connor TR. Repair of methylation damage in DNA and RNA by mammalian AlkB homologues. J Biol Chem. 2005 Nov 25;280(47):39448-59. Epub 2005 Sep 20. PMID:16174769 doi:M509881200
↑ Ringvoll J, Moen MN, Nordstrand LM, Meira LB, Pang B, Bekkelund A, Dedon PC, Bjelland S, Samson LD, Falnes PO, Klungland A. AlkB homologue 2-mediated repair of ethenoadenine lesions in mammalian DNA. Cancer Res. 2008 Jun 1;68(11):4142-9. doi: 10.1158/0008-5472.CAN-08-0796. PMID:18519673 doi:http://dx.doi.org/10.1158/0008-5472.CAN-08-0796
↑ Yang CG, Yi C, Duguid EM, Sullivan CT, Jian X, Rice PA, He C. Crystal structures of DNA/RNA repair enzymes AlkB and ABH2 bound to dsDNA. Nature. 2008 Apr 24;452(7190):961-5. PMID:18432238 doi:http://dx.doi.org/10.1038/nature06889
↑ Lu L, Yi C, Jian X, Zheng G, He C. Structure determination of DNA methylation lesions N1-meA and N3-meC in duplex DNA using a cross-linked protein-DNA system. Nucleic Acids Res. 2010 Jul;38(13):4415-25. Epub 2010 Mar 11. PMID:20223766 doi:10.1093/nar/gkq129

1 Structural highlights
2 Function
3 Evolutionary Conservation
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/3h8x"

@@ Line 1: / Line 1: @@
 ==Structure determination of DNA methylation lesions N1-meA and N3-meC in duplex DNA using a cross-linked host-guest system==
 <StructureSection load='3h8x' size='340' side='right' caption='[[3h8x]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3h8o|3h8o]], [[3h8r|3h8r]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ABH2, ALKBH2 ([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=3h8x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h8x OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3h8x RCSB], [http://www.ebi.ac.uk/pdbsum/3h8x 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=3h8x FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h8x OCA], [http://pdbe.org/3h8x PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3h8x RCSB], [http://www.ebi.ac.uk/pdbsum/3h8x PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3h8x ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 19: @@
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
-</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
+</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3h8x ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">
@@ Line 28: / Line 29: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 3h8x" style="background-color:#fffaf0;"></div>
 ==See Also==

3h8x

From Proteopedia

Revision as of 10:17, 4 August 2016

Structure determination of DNA methylation lesions N1-meA and N3-meC in duplex DNA using a cross-linked host-guest system

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

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Proteopedia Page Contributors and Editors (what is this?)

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