1kgp: Difference between revisions
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<StructureSection load='1kgp' size='340' side='right' caption='[[1kgp]], [[Resolution|resolution]] 2.00Å' scene=''> | <StructureSection load='1kgp' size='340' side='right' caption='[[1kgp]], [[Resolution|resolution]] 2.00Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1kgp]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[1kgp]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacterium_ammoniagenes"_cooke_and_keith_1927 "bacterium ammoniagenes" cooke and keith 1927]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KGP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1KGP FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1kgn|1kgn]], [[1kgo|1kgo]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1kgn|1kgn]], [[1kgo|1kgo]]</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=1kgp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kgp OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1kgp RCSB], [http://www.ebi.ac.uk/pdbsum/1kgp 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=1kgp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kgp OCA], [http://pdbe.org/1kgp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1kgp RCSB], [http://www.ebi.ac.uk/pdbsum/1kgp PDBsum]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 1kgp" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Bacterium ammoniagenes cooke and keith 1927]] | ||
[[Category: Hogbom, M]] | [[Category: Hogbom, M]] | ||
[[Category: Huque, Y]] | [[Category: Huque, Y]] | ||
Revision as of 15:03, 11 September 2015
R2F from Corynebacterium Ammoniagenes in its Mn substituted formR2F from Corynebacterium Ammoniagenes in its Mn substituted form
Structural highlights
Function[O69274_CORAM] Provides the precursors necessary for DNA synthesis. Catalyzes the biosynthesis of deoxyribonucleotides from the corresponding ribonucleotides (By similarity).[PIRNR:PIRNR000355] 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 PubMedRibonucleotide reductase (RNR) is the enzyme performing de novo production of the four deoxyribonucleotides needed for DNA synthesis. All mammals as well as some prokaryotes express the class I enzyme which is an alpha(2)beta(2) protein. The smaller of the homodimers, denoted R2, contains a di-iron carboxylate site which, upon reaction with molecular oxygen, generates a stable tyrosyl radical needed for catalysis. The three-dimensional structure of the oxidized class Ib RNR R2 from Corynebacterium ammoniagenes has been determined at 1.85 A resolution and refined to an R-value of 15.8% (R(free) = 21.3%). In addition, structures of both the reduced iron-containing, and manganese-substituted protein have been solved. The C. ammoniagenes R2 has been proposed to be manganese-dependent. The present structure provides evidence that manganese is not oxidized by the protein, in agreement with recent biochemical data, and that no obvious structural abnormalities are seen in the oxidized and reduced iron-containing forms, giving further support that the protein is indeed an iron-dependent RNR R2. The di-manganese structure also provides an explanation for the magnetic properties of this site. The structure of the oxidized C. ammoniagenes R2 also reveals an additional water molecule bridging the radical and the iron site, which has not previously been seen in any other R2 structure and which might have important mechanistic implications. Crystal structure of the di-iron/radical protein of ribonucleotide reductase from Corynebacterium ammoniagenes.,Hogbom M, Huque Y, Sjoberg BM, Nordlund P Biochemistry. 2002 Jan 29;41(4):1381-9. PMID:11802741[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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