Juan A Ayala
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Explore the profile of Juan A Ayala including associated specialties, affiliations and a list of published articles.
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Recent Articles
11.
Studer P, Borisova M, Schneider A, Ayala J, Mayer C, Schuppler M, et al.
PLoS One
. 2016 May;
11(5):e0154925.
PMID: 27149671
L-forms are cell wall-deficient variants of otherwise walled bacteria that maintain the ability to survive and proliferate in absence of the surrounding peptidoglycan sacculus. While transient or unstable L-forms can...
12.
Ropy A, Cabot G, Sanchez-Diener I, Aguilera C, Moya B, Ayala J, et al.
Antimicrob Agents Chemother
. 2015 Apr;
59(7):3925-34.
PMID: 25896695
This study aimed to characterize the role of Pseudomonas aeruginosa low-molecular-mass penicillin-binding proteins (LMM PBPs), namely, PBP4 (DacB), PBP5 (DacC), and PBP7 (PbpG), in peptidoglycan composition, β-lactam resistance, and ampC...
13.
Cambre A, Zimmermann M, Sauer U, Vivijs B, Cenens W, Michiels C, et al.
Environ Microbiol
. 2014 Aug;
17(5):1586-99.
PMID: 25142185
Many bacteria are able to assume a transient cell wall-deficient (or L-form) state under favourable osmotic conditions. Cell wall stress such as exposure to β-lactam antibiotics can enforce the transition...
14.
Hernandez S, Ayala J, Rico-Perez G, Garcia-Del Portillo F, Casadesus J
Int Microbiol
. 2014 Jan;
16(2):87-92.
PMID: 24400526
Prc is a periplasmic protease involved in processing of penicillin-binding protein 3 (PBP3). Lack of Prc suppresses bile sensitivity in Dam-, Wec-, PhoP-, DamX-, and SeqA- mutants of Salmonella enterica,...
15.
Di Conza J, Mollerach M, Gutkind G, Ayala J
Rev Argent Microbiol
. 2012 Sep;
44(2):69-74.
PMID: 22997763
In this work, plasmid-encoded virulence factors in two Salmonella Infantis isolates carrying multiresistance plasmids were investigated. In addition, their invasion and proliferative ability in non-phagocytic cells was studied. None of...
16.
Fernandez A, Perez A, Ayala J, Mallo S, Rumbo-Feal S, Tomas M, et al.
Antimicrob Agents Chemother
. 2012 Feb;
56(4):1877-84.
PMID: 22290977
β-Lactamases and penicillin-binding proteins (PBPs) have evolved from a common ancestor. β-Lactamases are enzymes that degrade β-lactam antibiotics, whereas PBPs are involved in the synthesis and processing of peptidoglycan, which...
17.
Bado I, Garcia-Fulgueiras V, Cordeiro N, Betancor L, Caiata L, Seija V, et al.
Antimicrob Agents Chemother
. 2012 Feb;
56(4):2132-4.
PMID: 22290976
We studied a clinical isolate of Salmonella enterica serotype Enteritidis showing resistance to oxyiminocephalosporins. PCR analysis confirmed the presence of bla(CTX-M-14) linked to IS903 in a 95-kb IncI1 conjugative plasmid....
18.
Vishnyakov I, Levitskii S, Manuvera V, Lazarev V, Ayala J, Ivanov V, et al.
Cell Stress Chaperones
. 2011 Oct;
17(2):171-80.
PMID: 22002515
α-Crystallin-type small heat shock proteins (sHsps) are expressed in many bacteria, animals, plants, and archaea. Among mycoplasmas (Mollicutes), predicted sHsp homologues so far were found only in the Acholeplasmataceae family....
19.
Gonzalez-Leiza S, de Pedro M, Ayala J
J Bacteriol
. 2011 Oct;
193(24):6887-94.
PMID: 22001512
In Escherichia coli, low-molecular-mass penicillin-binding proteins (LMM PBPs) are important for correct cell morphogenesis. These enzymes display DD-carboxypeptidase and/or dd-endopeptidase activities associated with maturation and remodeling of peptidoglycan (PG). AmpH...
20.
Cayo R, Rodriguez M, Espinal P, Fernandez-Cuenca F, Ocampo-Sosa A, Pascual A, et al.
Antimicrob Agents Chemother
. 2011 Sep;
55(12):5907-13.
PMID: 21947403
There is limited information on the role of penicillin-binding proteins (PBPs) in the resistance of Acinetobacter baumannii to β-lactams. This study presents an analysis of the allelic variations of PBP...