1mpg
From Proteopedia
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==3-METHYLADENINE DNA GLYCOSYLASE II FROM ESCHERICHIA COLI== | ==3-METHYLADENINE DNA GLYCOSYLASE II FROM ESCHERICHIA COLI== | ||
| - | <StructureSection load='1mpg' size='340' side='right' caption='[[1mpg]], [[Resolution|resolution]] 1.80Å' scene=''> | + | <StructureSection load='1mpg' size='340' side='right'caption='[[1mpg]], [[Resolution|resolution]] 1.80Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[1mpg]] is a 2 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[1mpg]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MPG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MPG FirstGlance]. <br> |
| - | </td></tr><tr id=' | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.8Å</td></tr> |
| - | <tr id=' | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></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=1mpg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mpg OCA], [https://pdbe.org/1mpg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mpg RCSB], [https://www.ebi.ac.uk/pdbsum/1mpg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mpg ProSAT]</span></td></tr> | |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | + | |
</table> | </table> | ||
== Function == | == Function == | ||
| - | [ | + | [https://www.uniprot.org/uniprot/3MG2_ECOLI 3MG2_ECOLI] Hydrolysis of the deoxyribose N-glycosidic bond to excise 3-methyladenine, 3-methylguanine, 7-methylguanine, O2-methylthymine, and O2-methylcytosine from the damaged DNA polymer formed by alkylation lesions. |
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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</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=1mpg 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=1mpg ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | Base-excision DNA repair proteins that target alkylation damage act on a variety of seemingly dissimilar adducts, yet fail to recognize other closely related lesions. The 1.8 A crystal structure of the monofunctional DNA glycosylase AlkA (E. coli 3-methyladenine-DNA glycosylase II) reveals a large hydrophobic cleft unusually rich in aromatic residues. An Asp residue projecting into this cleft is essential for catalysis, and it governs binding specificity for mechanism-based inhibitors. We propose that AlkA recognizes electron-deficient methylated bases through pi-donor/acceptor interactions involving the electron-rich aromatic cleft. Remarkably, AlkA is similar in fold and active site location to the bifunctional glycosylase/lyase endonuclease III, suggesting the two may employ fundamentally related mechanisms for base excision. | ||
| - | + | ==See Also== | |
| - | + | *[[DNA glycosylase 3D structures|DNA glycosylase 3D structures]] | |
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Escherichia coli]] |
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: Ellenberger | + | [[Category: Ellenberger TE]] |
| - | [[Category: Ezaz-Nikpay | + | [[Category: Ezaz-Nikpay K]] |
| - | [[Category: Labahn | + | [[Category: Labahn J]] |
| - | [[Category: Long | + | [[Category: Long A]] |
| - | [[Category: Schaerer | + | [[Category: Schaerer OD]] |
| - | [[Category: Verdine | + | [[Category: Verdine GL]] |
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Current revision
3-METHYLADENINE DNA GLYCOSYLASE II FROM ESCHERICHIA COLI
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