KatG-Mediated Oxidation Leading to Reduced Susceptibility
of Bacteria to Kanamycin
Posted on 2018-04-16 - 08:13
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.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Loewen, Peter
C.; De Silva, P. Malaka; Donald, Lynda J.; Switala, Jacek; Villanueva, Jacylyn; Fita, Ignacio; et al. (2018). KatG-Mediated Oxidation Leading to Reduced Susceptibility
of Bacteria to Kanamycin. ACS Publications. Collection. https://doi.org/10.1021/acsomega.8b00356
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
Read the peer-reviewed publication
AUTHORS (7)
PL
Peter
C. Loewen
PD
P. Malaka De Silva
LD
Lynda J. Donald
JS
Jacek Switala
JV
Jacylyn Villanueva
IF
Ignacio Fita
AK
Ayush Kumar
KEYWORDS
Mycobacterium tuberculosisperoxidase reactiontransport systemsresistanceoxidative burstsantitubercular drug isoniazidglycoside maltoseaminoglycoside antibioticsBacterial-encoded enzymesKatG-Mediated Oxidationelectron donoroxygen atomReduced SusceptibilityKanamycin Resistanceferryl intermediatesbinding sitekanamycin