View source for 3mzb


==X-ray structure of NikA in complex with the doubly hydroxylated iron complex, 1-O2==
<StructureSection load='3mzb' size='340' side='right'caption='[[3mzb]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3mzb]] is a 2 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=3MZB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3MZB 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]] 1.7&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=BHR:2-[2-[CARBOXYMETHYL-[(2-HYDROXYPHENYL)METHYL]AMINO]ETHYL-[(2,3-DIHYDROXYPHENYL)METHYL]AMINO]ETHANOIC+ACID'>BHR</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=DTD:DITHIANE+DIOL'>DTD</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=3mzb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3mzb OCA], [https://pdbe.org/3mzb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3mzb RCSB], [https://www.ebi.ac.uk/pdbsum/3mzb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3mzb ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NIKA_ECOLI NIKA_ECOLI] Involved in a nickel transport system, probably represents the nickel binder.
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== Publication Abstract from PubMed ==
Chemical reactions inside single crystals are quite rare because crystallinity is difficult to retain owing to atomic rearrangements. Protein crystals in general have a high solvent content. This allows for some molecular flexibility, which makes it possible to trap reaction intermediates of enzymatic reactions without disrupting the crystal lattice. A similar approach has not yet been fully implemented in the field of inorganic chemistry. Here, we have combined model chemistry and protein X-ray crystallography to study the intramolecular aromatic dihydroxylation by an arene-containing protein-bound iron complex. The bound complex was able to activate dioxygen in the presence of a reductant, leading to the formation of catechol as the sole product. The structure determination of four of the catalytic cycle intermediates and the end product showed that the hydroxylation reaction implicates an iron peroxo, generated by reductive O(2) activation, an intermediate already observed in iron monooxygenases. This strategy also provided unexpected mechanistic details such as the rearrangement of the iron coordination sphere on metal reduction.

Crystallographic snapshots of the reaction of aromatic C-H with O(2) catalysed by a protein-bound iron complex.,Cavazza C, Bochot C, Rousselot-Pailley P, Carpentier P, Cherrier MV, Martin L, Marchi-Delapierre C, Fontecilla-Camps JC, Menage S Nat Chem. 2010 Dec;2(12):1069-76. Epub 2010 Oct 10. PMID:21107372<ref>PMID:21107372</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 3mzb" style="background-color:#fffaf0;"></div>

==See Also==
*[[ABC transporter 3D structures|ABC transporter 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Bochot C]]
[[Category: Carpentier P]]
[[Category: Cavazza C]]
[[Category: Cherrier MV]]
[[Category: Fontecilla-Camps JC]]
[[Category: Marchi-Delapierre C]]
[[Category: Martin L]]
[[Category: Menage S]]
[[Category: Rousselot-Pailley P]]