Results 11 to 20 of about 86,850 (260)

RelQ Mediates the Expression of β-Lactam Resistance in Methicillin-Resistant Staphylococcus aureus [PDF]

Frontiers in Microbiology, 2019
An induced stringent response, which is established by an increased level of (p)ppGpp, is required for the expression of β-lactam resistance in methicillin-resistant Staphylococcus aureus (MRSA).
Ajita Bhawini, Parul Pandey, Ashutosh Prakash Dubey, Aafreen Zehra, Gopal Nath, Mukti Nath Mishra, Mukti Nath Mishra   +6 more
doaj   +2 more sources

Important role of a putative lytic transglycosylase Cj0843c in β-lactam resistance in Campylobacter jejuni

Frontiers in Microbiology, 2015
Beta-lactam antibiotics are an important class of antibiotics for treating bacterial infections. Despite prevalent β-lactam resistance in Campylobacter jejuni, the leading bacterial cause of human diarrhea in developed countries, molecular mechanism of β-
Ximin eZeng, Barbara eGillespie, Jun eLin   +2 more
doaj   +2 more sources

Molecular basis of β-lactam antibiotic resistance of ESKAPE bacterium E. faecium Penicillin Binding Protein PBP5

Nature Communications, 2023
Penicillin-binding proteins (PBPs) are essential for the formation of the bacterial cell wall. They are also the targets of β-lactam antibiotics. In Enterococcus faecium, high levels of resistance to β-lactams are associated with the expression of PBP5 ...
Yamanappa Hunashal, Ganesan Senthil Kumar, Meng S. Choy, Éverton D. D’Andréa, Andre Da Silva Santiago, Marta V. Schoenle, Charlene Desbonnet, Michel Arthur, Louis B. Rice, Rebecca Page, Wolfgang Peti   +10 more
doaj   +2 more sources

β-Lactam Antibiotics Renaissance

Antibiotics, 2014
Since the 1940s β-lactam antibiotics have been used to treat bacterial infections. However, emergence and dissemination of β-lactam resistance has reached the point where many marketed β-lactams no longer are clinically effective.
Wenling Qin, Mauro Panunzio, Stefano Biondi   +2 more
doaj   +2 more sources

Thefiblocus inStreptococcus pneumoniaeis required for peptidoglycan crosslinking and PBP-mediated β-lactam resistance [PDF]

FEMS Microbiology Letters, 2000
Penicillin resistance in pneumococci is mediated by modified penicillin-binding proteins (PBPs) that have decreased affinity to beta-lactams. In high-level penicillin-resistant transformants of the laboratory strain Streptococcus pneumoniae R6 containing various combinations of low-affinity PBPs, disruption of the fib locus results in a collapse of PBP-
B, Weber, K, Ehlert, A, Diehl, P, Reichmann, H, Labischinski, R, Hakenbeck   +5 more
openaire   +2 more sources

Transcending the challenge of evolving resistance mechanisms in Pseudomonas aeruginosa through β-lactam-enhancer-mechanism-based cefepime/zidebactam

mBio, 2023
Multi-drug resistant (MDR) Pseudomonas aeruginosa harbor a complex array of β-lactamases and non-enzymatic resistance mechanisms. In this study, the activity of a β-lactam/β-lactam-enhancer, cefepime/zidebactam, and novel β-lactam/β-lactamase inhibitor ...
Andrea M. Hujer, Steven H. Marshall, Andrew R. Mack, Kristine M. Hujer, Yamuna Devi Bakthavatchalam, Kushal Umarkar, Snehal R. Palwe, Swapna Takalkar, Prashant R. Joshi, Rahul Shrivastava, Hariharan Periasamy, Sachin S. Bhagwat, Mahesh V. Patel, Balaji Veeraraghavan, Robert A. Bonomo   +14 more
doaj   +1 more source

Restoration of effectiveness of β-lactams on methicillin-resistantStaphylococcus aureusby tellimagrandin I from rose red [PDF]

FEMS Microbiology Letters, 2000
We found that extract from petals of Rosa canina L. (rose red) strikingly reduced the minimum inhibitory concentration of beta-lactams in methicillin-resistant Staphylococcus aureus. We isolated two compounds that reduced the minimum inhibitory concentrations of beta-lactams from the extract, tellimagrandin I and rugosin B.
S, Shiota, M, Shimizu, T, Mizusima, H, Ito, T, Hatano, T, Yoshida, T, Tsuchiya   +6 more
openaire   +2 more sources

Loss of GdpP Function in Staphylococcus aureus Leads to β-Lactam Tolerance and Enhanced Evolution of β-Lactam Resistance [PDF]

, 2022
Infections caused by Staphylococcus aureus are a leading cause of mortality. Treating infections caused by S. aureus is difficult due to resistance against most traditional antibiotics, including β-lactams.
Huang, Liusheng, Datta, Sandip K, Chambers, Henry F., Poon, Raymond, Buggeln, Emma, Chatterjee, Aditi, Chambers, Henry F, Argudín, Maria A, Nair, Vinod, Argudín, Maria A., Chatterjee, Som S, Chatterjee, Som S., Datta, Sandip K., Basuino, Li, Satishkumar, Nidhi, Mukkayyan, Nagaraja   +15 more
core   +1 more source

Resistance to β-lactam antibiotics conferred by point mutations in penicillin-binding proteins PBP3, PBP4 and PBP6 in Salmonella enterica. [PDF]

PLoS ONE, 2014
Penicillin-binding proteins (PBPs) are enzymes responsible for the polymerization of the glycan strand and the cross-linking between glycan chains as well as the target proteins for β-lactam antibiotics.
Song Sun, Maria Selmer, Dan I Andersson
doaj   +1 more source

Substitution of Thr for Ala-237 in TEM-17, TEM-12 and TEM-26: alterations in β-lactam resistance conferred onEscherichia coli [PDF]

FEMS Microbiology Letters, 2001
Non-naturally occurring mutants of TEM-17 (E104K), TEM-12 (R164S) and TEM-26 (E104K:R164S) extended-spectrum (ES) beta-lactamases bearing threonine at position 237 were constructed by site-specific mutagenesis and expressed under isogenic conditions in Escherichia coli.
Giakkoupi, P., Hujer, A.M., Miriagou, V., Tzelepi, E., Bonomo, R.A., Tzouvelekis, L.S.   +5 more
openaire   +4 more sources