2qeg: Difference between revisions

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{{Seed}}
[[Image:2qeg.png|left|200px]]


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==B-DNA with 7-deaza-dG modification==
The line below this paragraph, containing "STRUCTURE_2qeg", creates the "Structure Box" on the page.
<StructureSection load='2qeg' size='340' side='right'caption='[[2qeg]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)  
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[2qeg]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QEG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2QEG FirstGlance]. <br>
or leave the SCENE parameter empty for the default display.
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.6&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=7GU:7-DEAZA-2-DEOXYGUANOSINE-5-MONOPHOSPHATE'>7GU</scene></td></tr>
{{STRUCTURE_2qeg|  PDB=2qeg  |  SCENE=  }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2qeg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2qeg OCA], [https://pdbe.org/2qeg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2qeg RCSB], [https://www.ebi.ac.uk/pdbsum/2qeg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2qeg ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Site-specific insertion of 5-(3-aminopropyl)-2'-deoxyuridine (Z3dU) and 7-deaza-dG into the Dickerson-Drew dodecamers 5'-d(C (1)G (2)C (3)G (4)A (5)A (6)T (7)T (8)C (9) Z (10)C (11)G (12))-3'.5'-d(C (13)G (14)C (15)G (16)A (17)A (18)T (19)T (20)C (21) Z (22)C (23)G (24))-3' (named DDD (Z10)) and 5'-d(C (1)G (2)C (3)G (4)A (5)A (6)T (7) X (8)C (9) Z (10)C (11)G (12))-3'.5'-d(C (13)G (14)C (15)G (16)A (17)A (18)T (19) X (20)C (21) Z (22)C (23)G (24))-3' (named DDD (2+Z10)) (X = Z3dU; Z = 7-deaza-dG) suggests a mechanism underlying the formation of interstrand N+2 DNA cross-links by nitrogen mustards, e.g., melphalan and mechlorethamine. Analysis of the DDD (2+Z10) duplex reveals that the tethered cations at base pairs A (5).X (20) and X (8).A (17) extend within the major groove in the 3'-direction, toward conserved Mg (2+) binding sites located adjacent to N+2 base pairs C (3).Z (22) and Z (10).C (15). Bridging waters located between the tethered amines and either Z (10) or Z (22) O (6) stabilize the tethered cations and allow interactions with the N + 2 base pairs without DNA bending. Incorporation of 7-deaza-dG into the DDD (2+Z10) duplex weakens but does not eliminate electrostatic interactions between tethered amines and Z (10) O (6) and Z (22) O (6). The results suggest a mechanism by which tethered N7-dG aziridinium ions, the active species involved in formation of interstrand 5'-GNC-3' cross-links by nitrogen mustards, modify the electrostatics of the major groove and position the aziridinium ions proximate to the major groove edge of the N+2 C.G base pair, facilitating interstrand cross-linking.


===B-DNA with 7-deaza-dG modification===
A bridging water anchors the tethered 5-(3-aminopropyl)-2'-deoxyuridine amine in the DNA major groove proximate to the N+2 C.G base pair: implications for formation of interstrand 5'-GNC-3' cross-links by nitrogen mustards.,Wang F, Li F, Ganguly M, Marky LA, Gold B, Egli M, Stone MP Biochemistry. 2008 Jul 8;47(27):7147-57. Epub 2008 Jun 13. PMID:18549246<ref>PMID:18549246</ref>


 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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The line below this paragraph, {{ABSTRACT_PUBMED_18549246}}, adds the Publication Abstract to the page
<div class="pdbe-citations 2qeg" style="background-color:#fffaf0;"></div>
(as it appears on PubMed at http://www.pubmed.gov), where 18549246 is the PubMed ID number.
== References ==
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<references/>
{{ABSTRACT_PUBMED_18549246}}
__TOC__
 
</StructureSection>
==About this Structure==
[[Category: Large Structures]]
2QEG is a [[Single protein]] structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QEG OCA].
[[Category: Egli M]]
 
[[Category: Ganguly M]]
==Reference==
[[Category: Gold B]]
A bridging water anchors the tethered 5-(3-aminopropyl)-2'-deoxyuridine amine in the DNA major groove proximate to the N+2 C.G base pair: implications for formation of interstrand 5'-GNC-3' cross-links by nitrogen mustards., Wang F, Li F, Ganguly M, Marky LA, Gold B, Egli M, Stone MP, Biochemistry. 2008 Jul 8;47(27):7147-57. Epub 2008 Jun 13. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/18549246 18549246]
[[Category: Li F]]
[[Category: Single protein]]
[[Category: Marky LA]]
[[Category: Egli, M.]]
[[Category: Stone MP]]
[[Category: Ganguly, M.]]
[[Category: Wang F]]
[[Category: Gold, B.]]
[[Category: Li, F.]]
[[Category: Marky, L A.]]
[[Category: Stone, M P.]]
[[Category: Wang, F.]]
[[Category: 7-deaza-dg]]
[[Category: B-dna]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Oct 15 12:26:57 2008''

Latest revision as of 11:29, 30 August 2023

B-DNA with 7-deaza-dG modification

2qeg, resolution 1.60Å

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