View source for 3pxt


==Crystal Structure of Ferrous CO Adduct of MauG in Complex with Pre-Methylamine Dehydrogenase==
<StructureSection load='3pxt' size='340' side='right'caption='[[3pxt]], [[Resolution|resolution]] 2.16&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3pxt]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Paracoccus_denitrificans_PD1222 Paracoccus denitrificans PD1222]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PXT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PXT 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]] 2.16&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=0AF:7-HYDROXY-L-TRYPTOPHAN'>0AF</scene>, <scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CMO:CARBON+MONOXIDE'>CMO</scene>, <scene name='pdbligand=HEC:HEME+C'>HEC</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=PG6:1-(2-METHOXY-ETHOXY)-2-{2-[2-(2-METHOXY-ETHOXY]-ETHOXY}-ETHANE'>PG6</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=3pxt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3pxt OCA], [https://pdbe.org/3pxt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3pxt RCSB], [https://www.ebi.ac.uk/pdbsum/3pxt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3pxt ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MAUG_PARDP MAUG_PARDP] Involved in methylamine metabolism. Essential for the maturation of the beta subunit of MADH, presumably via a step in the biosynthesis of tryptophan tryptophylquinone (TTQ), the cofactor of MADH.
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== Publication Abstract from PubMed ==
MauG is a diheme enzyme responsible for the post-translational formation of the catalytic tryptophan tryptophylquinone (TTQ) cofactor in methylamine dehydrogenase (MADH). MauG can utilize hydrogen peroxide, or molecular oxygen and reducing equivalents, to complete this reaction via a catalytic bis-Fe(IV) intermediate. Crystal structures of diferrous, Fe(II)-CO, and Fe(II)-NO forms of MauG in complex with its preMADH substrate have been determined and compared to one another as well as to the structure of the resting diferric MauG-preMADH complex. CO and NO each bind exclusively to the 5-coordinate high-spin heme with no change in ligation of the 6-coordinate low-spin heme. These structures reveal likely roles for amino acid residues in the distal pocket of the high-spin heme in oxygen binding and activation. Glu113 is implicated in the protonation of heme-bound diatomic oxygen intermediates in promoting cleavage of the O-O bond. Pro107 is shown to change conformation on the binding of each ligand and may play a steric role in oxygen activation by positioning the distal oxygen near Glu113. Gln103 is in a position to provide a hydrogen bond to the Fe(IV) horizontal lineO moiety that may account for the unusual stability of this species in MauG.

Crystal Structures of CO and NO Adducts of MauG in Complex with Pre-Methylamine Dehydrogenase: Implications for the Mechanism of Dioxygen Activation.,Yukl ET, Goblirsch BR, Davidson VL, Wilmot CM Biochemistry. 2011 Mar 16. PMID:21355604<ref>PMID:21355604</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 3pxt" style="background-color:#fffaf0;"></div>

==See Also==
*[[Methylamine dehydrogenase|Methylamine dehydrogenase]]
*[[Methylamine utilisation protein|Methylamine utilisation protein]]
*[[Methylation utilization protein MauG|Methylation utilization protein MauG]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Paracoccus denitrificans PD1222]]
[[Category: Goblirsch BR]]
[[Category: Wilmot CM]]
[[Category: Yukl ET]]