View source for 3n38


==Ribonucleotide Reductase NrdF from Escherichia coli Soaked with Ferrous Ions==
<StructureSection load='3n38' size='340' side='right'caption='[[3n38]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3n38]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3N38 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3N38 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.9&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE2:FE+(II)+ION'>FE2</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=3n38 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3n38 OCA], [https://pdbe.org/3n38 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3n38 RCSB], [https://www.ebi.ac.uk/pdbsum/3n38 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3n38 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/RIR4_ECOLI RIR4_ECOLI] Provides the precursors necessary for DNA synthesis. Catalyzes the biosynthesis of deoxyribonucleotides from the corresponding ribonucleotides. R2F contains the tyrosyl radical required for catalysis.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/n3/3n38_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <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/main_output.php?pdb_ID=3n38 ConSurf].
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== Publication Abstract from PubMed ==
The class Ib ribonucleotide reductase of Escherichia coli can initiate reduction of nucleotides to deoxynucleotides with either a Mn(III)(2)-tyrosyl radical (Y*) or a Fe(III)(2)-Y* cofactor in the NrdF subunit. Whereas Fe(III)(2)-Y* can self-assemble from Fe(II)(2)-NrdF and O(2), activation of Mn(II)(2)-NrdF requires a reduced flavoprotein, NrdI, proposed to form the oxidant for cofactor assembly by reduction of O(2). The crystal structures reported here of E. coli Mn(II)(2)-NrdF and Fe(II)(2)-NrdF reveal different coordination environments, suggesting distinct initial binding sites for the oxidants during cofactor activation. In the structures of Mn(II)(2)-NrdF in complex with reduced and oxidized NrdI, a continuous channel connects the NrdI flavin cofactor to the NrdF Mn(II)(2) active site. Crystallographic detection of a putative peroxide in this channel supports the proposed mechanism of Mn(III)(2)-Y* cofactor assembly.

Structural Basis for Activation of Class Ib Ribonucleotide Reductase.,Boal AK, Cotruvo JA Jr, Stubbe J, Rosenzweig AC Science. 2010 Aug 5. PMID:20688982<ref>PMID:20688982</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3n38" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ribonucleotide reductase 3D structures|Ribonucleotide reductase 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Boal AK]]
[[Category: Cotruvo Jr JA]]
[[Category: Rosenzweig AC]]
[[Category: Stubbe J]]