1k82

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[[Image:1k82.gif|left|200px]]
[[Image:1k82.gif|left|200px]]
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{{Structure
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|PDB= 1k82 |SIZE=350|CAPTION= <scene name='initialview01'>1k82</scene>, resolution 2.10&Aring;
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The line below this paragraph, containing "STRUCTURE_1k82", creates the "Structure Box" on the page.
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|SITE=
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=DA:2&#39;-DEOXYADENOSINE-5&#39;-MONOPHOSPHATE'>DA</scene>, <scene name='pdbligand=DC:2&#39;-DEOXYCYTIDINE-5&#39;-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DG:2&#39;-DEOXYGUANOSINE-5&#39;-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5&#39;-MONOPHOSPHATE'>DT</scene>, <scene name='pdbligand=PED:PENTANE-3,4-DIOL-5-PHOSPHATE'>PED</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-formamidopyrimidine_glycosylase DNA-formamidopyrimidine glycosylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.23 3.2.2.23] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE= fpg ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])
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|DOMAIN=
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{{STRUCTURE_1k82| PDB=1k82 | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1k82 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k82 OCA], [http://www.ebi.ac.uk/pdbsum/1k82 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1k82 RCSB]</span>
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}}
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'''Crystal structure of E.coli formamidopyrimidine-DNA glycosylase (Fpg) covalently trapped with DNA'''
'''Crystal structure of E.coli formamidopyrimidine-DNA glycosylase (Fpg) covalently trapped with DNA'''
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[[Category: Shoham, G.]]
[[Category: Shoham, G.]]
[[Category: Zharkov, D O.]]
[[Category: Zharkov, D O.]]
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[[Category: beta sandwich]]
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[[Category: Beta sandwich]]
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[[Category: dna repair]]
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[[Category: Dna repair]]
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[[Category: helix two-turns helix]]
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[[Category: Helix two-turns helix]]
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[[Category: protein-dna complex]]
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[[Category: Protein-dna complex]]
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[[Category: zinc finger]]
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[[Category: Zinc finger]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:44:39 2008''
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Revision as of 19:24, 2 May 2008

Template:STRUCTURE 1k82

Crystal structure of E.coli formamidopyrimidine-DNA glycosylase (Fpg) covalently trapped with DNA


Overview

Formamidopyrimidine-DNA glycosylase (Fpg) is a DNA repair enzyme that excises oxidized purines from damaged DNA. The Schiff base intermediate formed during this reaction between Escherichia coli Fpg and DNA was trapped by reduction with sodium borohydride, and the structure of the resulting covalently cross-linked complex was determined at a 2.1-A resolution. Fpg is a bilobal protein with a wide, positively charged DNA-binding groove. It possesses a conserved zinc finger and a helix-two turn-helix motif that participate in DNA binding. The absolutely conserved residues Lys-56, His-70, Asn-168, and Arg-258 form hydrogen bonds to the phosphodiester backbone of DNA, which is sharply kinked at the lesion site. Residues Met-73, Arg-109, and Phe-110 are inserted into the DNA helix, filling the void created by nucleotide eversion. A deep hydrophobic pocket in the active site is positioned to accommodate an everted base. Structural analysis of the Fpg-DNA complex reveals essential features of damage recognition and the catalytic mechanism of Fpg.

About this Structure

1K82 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Structure of formamidopyrimidine-DNA glycosylase covalently complexed to DNA., Gilboa R, Zharkov DO, Golan G, Fernandes AS, Gerchman SE, Matz E, Kycia JH, Grollman AP, Shoham G, J Biol Chem. 2002 May 31;277(22):19811-6. Epub 2002 Mar 23. PMID:11912217 Page seeded by OCA on Fri May 2 22:24:58 2008

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