6b9b

Crystal structure of the catalase-peroxidase from B. pseudomallei with maltose bound

spinqualitylabelsall models 6b9b, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6b9b is a 2 chain structure with sequence from Burkholderia pseudomallei 1710b. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.8Å Ligands: CL, GLC, HEM, MPD, NA, OXY, PO4, PRD_900001, TOX Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function KATG_BURP1 Bifunctional enzyme with both catalase and broad-spectrum peroxidase activity. 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 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Catalase 3D structures

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