View source for 6b9b


==Crystal structure of the catalase-peroxidase from B. pseudomallei with maltose bound==
<StructureSection load='6b9b' size='340' side='right'caption='[[6b9b]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6b9b]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Burkholderia_pseudomallei_1710b Burkholderia pseudomallei 1710b]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6B9B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6B9B 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]] 1.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=OXY:OXYGEN+MOLECULE'>OXY</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=PRD_900001:alpha-maltose'>PRD_900001</scene>, <scene name='pdbligand=TOX:1-HYDROPEROXY-L-TRYPTOPHAN'>TOX</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=6b9b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6b9b OCA], [https://pdbe.org/6b9b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6b9b RCSB], [https://www.ebi.ac.uk/pdbsum/6b9b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6b9b ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/KATG_BURP1 KATG_BURP1] Bifunctional enzyme with both catalase and broad-spectrum peroxidase activity.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Resistance to antibiotics has become a serious problem for society, and there are increasing efforts to understand the reasons for and sources of resistance. Bacterial-encoded enzymes and transport systems, both innate and acquired, are the most frequent culprits for the development of resistance, although in Mycobacterium tuberculosis, the catalase-peroxidase, KatG, has been linked to the activation of the antitubercular drug isoniazid. While investigating a possible link between aminoglycoside antibiotics and the induction of oxidative bursts, we observed that KatG reduces susceptibility to aminoglycosides. Investigation revealed that kanamycin served as an electron donor for the peroxidase reaction, reducing the oxidized ferryl intermediates of KatG to the resting state. Loss of electrons from kanamycin was accompanied by the addition of a single oxygen atom to the aminoglycoside. The oxidized form of kanamycin proved to be less effective as an antibiotic. Kanamycin inhibited the crystallization of KatG, but the smaller, structurally related glycoside maltose did cocrystallize with KatG, providing a suggestion as to the possible binding site of kanamycin.

KatG-Mediated Oxidation Leading to Reduced Susceptibility of Bacteria to Kanamycin.,Loewen PC, De Silva PM, Donald LJ, Switala J, Villanueva J, Fita I, Kumar A ACS Omega. 2018 Apr 30;3(4):4213-4219. doi: 10.1021/acsomega.8b00356. Epub 2018, Apr 16. PMID:29732452<ref>PMID:29732452</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6b9b" style="background-color:#fffaf0;"></div>

==See Also==
*[[Catalase 3D structures|Catalase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Burkholderia pseudomallei 1710b]]
[[Category: Large Structures]]
[[Category: Loewen PC]]