scholarly journals Biochemical Sequence Analyses of GES-1, a Novel Class A Extended-Spectrum β-Lactamase, and the Class 1 Integron In52 from Klebsiella pneumoniae

2000 ◽  
Vol 44 (3) ◽  
pp. 622-632 ◽  
Author(s):  
Laurent Poirel ◽  
Isabelle Le Thomas ◽  
Thierry Naas ◽  
Amal Karim ◽  
Patrice Nordmann
Keyword(s):  
Amino Acid ◽  
Klebsiella Pneumoniae ◽  
Amino Acid Identity ◽  
Class 1 Integron ◽  
Chloramphenicol Resistance ◽  
Acid Identity ◽  
Gene Cassettes ◽  
Class A ◽  
Extended Spectrum ◽  
Class 1

ABSTRACT Klebsiella pneumoniae ORI-1 was isolated in 1998 in France from a rectal swab of a 1-month-old girl who was previously hospitalized in Cayenne Hospital, Cayenne, French Guiana. This strain harbored a ca. 140-kb nontransferable plasmid, pTK1, that conferred an extended-spectrum cephalosporin resistance profile antagonized by the addition of clavulanic acid, tazobactam, or imipenem. The gene for GES-1 (Guiana extended-spectrum β-lactamase) was cloned, and its protein was expressed in Escherichia coli DH10B, where this pI-5.8 β-lactamase of a ca. 31-kDa molecular mass conferred resistance to oxyimino cephalosporins (mostly to ceftazidime). GES-1 is weakly related to the other plasmid-located Ambler class A extended-spectrum β-lactamases (ESBLs). The highest percentage of amino acid identity was obtained with the carbenicillinase GN79 from Proteus mirabilis; with YENT, a chromosome-borne penicillinase fromYersinia enterocolitica; and with L-2, a chromosome-borne class A cephalosporinase from Stenotrophomonas maltophilia(36% amino acid identity each). However, a dendrogram analysis showed that GES-1 clustered within a class A ESBL subgroup together with ESBLs VEB-1 and PER-1. Sequencing of a 7,098-bp DNA fragment from plasmid pTK1 revealed that the GES-1 gene was located on a novel class 1 integron named In52 that was characterized by (i) a 5′ conserved segment containing an intI1 gene possessing two putative promoters, P1 and P2, for coordinated expression of the downstream antibiotic resistance genes and an attI1 recombination site; (ii) five antibiotic gene cassettes, bla GES-1,aac(6′)Ib′ (gentamicin resistance and amikacin susceptibility), dfrXVb (trimethoprim resistance), a novel chloramphenicol resistance gene (cmlA4), andaadA2 (streptomycin-spectinomycin resistance); and (iii) a 3′ conserved segment consisting of qacEΔ1 andsulI. The bla GES-1 andaadA2 gene cassettes were peculiar, since they lacked a typical 59-base element. This work identified the second class A ESBL gene of a non-TEM, non-SHV series which was located in the plasmid and integron, thus providing it additional means for its spread and its expression.

scholarly journals Chromosome-Encoded Ambler Class A β-Lactamase of Kluyvera georgiana, a Probable Progenitor of a Subgroup of CTX-M Extended-Spectrum β-Lactamases

2002 ◽  
Vol 46 (12) ◽  
pp. 4038-4040 ◽  
Author(s):  
Laurent Poirel ◽  
Peter Kämpfer ◽  
Patrice Nordmann
Keyword(s):  
Escherichia Coli ◽  
Amino Acid ◽  
Reference Strain ◽  
Amino Acid Identity ◽  
Acid Identity ◽  
Class A ◽  
Extended Spectrum ◽  
Lactamase Gene

ABSTRACT A chromosome-encoded β-lactamase gene, cloned and expressed in Escherichia coli from Kluyvera georgiana reference strain CUETM 4246-74 (DSM 9408), encoded the extended-spectrum β-lactamase KLUG-1, which shared 99% amino acid identity with the plasmid-mediated β-lactamase CTX-M-8. This work provides further evidence that Kluyvera spp. may be the progenitor(s) of CTX-M-type β-lactamases.

scholarly journals Coproduction of 16S rRNA Methyltransferase RmtD or RmtG with KPC-2 and CTX-M Group Extended-Spectrum β-Lactamases in Klebsiella pneumoniae

2013 ◽  
Vol 57 (5) ◽  
pp. 2397-2400 ◽  
Author(s):  
Maria Fernanda C. Bueno ◽  
Gabriela R. Francisco ◽  
Jessica A. O'Hara ◽  
Doroti de Oliveira Garcia ◽  
Yohei Doi
Keyword(s):  
Amino Acid ◽  
16S Rrna ◽  
Klebsiella Pneumoniae ◽  
Amino Acid Identity ◽  
Aminoglycoside Resistance ◽  
Content Type ◽  
Acid Identity ◽  
Paulo State ◽  
Extended Spectrum ◽  
High Level

ABSTRACTEightKlebsiella pneumoniaeclinical strains with high-level aminoglycoside resistance were collected from eight hospitals in São Paulo State, Brazil, in 2010 and 2011. Three of them produced an RmtD group 16S rRNA methyltransferase, RmtD1 or RmtD2. Five strains were found to produce a novel 16S rRNA methyltransferase, designated RmtG, which shared 57 to 58% amino acid identity with RmtD1 and RmtD2. Seven strains coproduced KPC-2 with or without various CTX-M group extended-spectrum β-lactamases, while the remaining strain coproduced CTX-M-2.

scholarly journals Oxacillinase-Mediated Resistance to Cefepime and Susceptibility to Ceftazidime in Pseudomonas aeruginosa

2001 ◽  
Vol 45 (6) ◽  
pp. 1615-1620 ◽  
Author(s):  
Daniel Aubert ◽  
Laurent Poirel ◽  
Jacqueline Chevalier ◽  
Sophie Leotard ◽  
Jean-Marie Pages ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Amino Acid ◽  
Clinical Isolate ◽  
Amino Acid Identity ◽  
Class 1 Integron ◽  
Acid Identity ◽  
Resistance Phenotype ◽  
Class D ◽  
Class 1 ◽  
Efflux Mechanism

ABSTRACT Pseudomonas aeruginosa clinical isolate SOF-1 was resistant to cefepime and susceptible to ceftazidime. This resistance phenotype was explained by the expression of OXA-31, which shared 98% amino acid identity with a class D β-lactamase, OXA-1. Theoxa-31 gene was located on a ca. 300-kb nonconjugative plasmid and on a class 1 integron. No additional efflux mechanism for cefepime was detected in P. aeruginosa SOF-1. Resistance to cefepime and susceptibility to ceftazidime in P. aeruginosawere conferred by OXA-1 as well.

scholarly journals Characterization of a Chromosomally Encoded Extended-Spectrum Class A β-Lactamase from Kluyvera cryocrescens

2001 ◽  
Vol 45 (12) ◽  
pp. 3595-3598 ◽  
Author(s):  
Jean W. Decousser ◽  
Laurent Poirel ◽  
Patrice Nordmann
Keyword(s):  
Amino Acid ◽  
Reference Strain ◽  
Amino Acid Identity ◽  
Acid Identity ◽  
Class A ◽  
Extended Spectrum ◽  
Kluyvera Ascorbata ◽  
Lactamase Gene ◽  
Kluyvera Cryocrescens

ABSTRACT A chromosomally located β-lactamase gene, cloned and expressed inEscherichia coli from a reference strain of the enterobacterial species Kluyvera cryocrescens, encoded a clavulanic acid-inhibited Ambler class A enzyme, KLUC-1, with a pI value of 7.4. KLUC-1 shared 86% amino acid identity with a subgroup of plasmid-mediated CTX-M-type extended-spectrum β-lactamases (CTX-M-1, -3, -10, -11, and -12), the most closely related enzymes, and 77% amino acid identity with KLUA-1 from Kluyvera ascorbata.The substrate profile of KLUC-1 corresponded to that of CTX-M-type enzymes.

Antimicrobial Resistance, Extended-Spectrum β-Lactamase Productivity, and Class 1 Integrons in Escherichia coli from Healthy Swine

2015 ◽  
Vol 78 (8) ◽  
pp. 1442-1450 ◽  
Author(s):  
KANJANA CHANGKAEW ◽  
APIRADEE INTARAPUK ◽  
FUANGFA UTRARACHKIJ ◽  
CHIE NAKAJIMA ◽  
ORASA SUTHIENKUL ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Resistance ◽  
Intestinal Flora ◽  
Class 1 Integron ◽  
Potential Health ◽  
Gene Cassettes ◽  
E Coli ◽  
Class 1 Integrons ◽  
Extended Spectrum ◽  
Class 1

Administration of antimicrobials to food-producing animals increases the risk of higher antimicrobial resistance in the normal intestinal flora of these animals. The present cross-sectional study was conducted to investigate antimicrobial susceptibility and extended-spectrum β-lactamase (ESBL)–producing strains and to characterize class 1 integrons in Escherichia coli in healthy swine in Thailand. All 122 of the tested isolates had drug-resistant phenotypes. High resistance was found to ampicillin (98.4% of isolates), chloramphenicol (95.9%), gentamicin (78.7%), streptomycin (77.9%), tetracycline (74.6%), and cefotaxime (72.1%). Fifty-four (44.3%) of the E. coli isolates were confirmed as ESBL-producing strains. Among them, blaCTX-M (45 isolates) and blaTEM (41 isolates) were detected. Of the blaCTX-M-positive E. coli isolates, 37 carried the blaCTX-M-1 cluster, 12 carried the blaCTX-M-9 cluster, and 5 carried both clusters. Sequence analysis revealed blaTEM-1, blaTEM-135, and blaTEM-175 in 38, 2, and 1 isolate, respectively. Eighty-seven (71%) of the 122isolates carried class 1 integrons, and eight distinct drug-resistance gene cassettes with seven different integron profiles were identified in 43 of these isolates. Gene cassettes were associated with resistance to aminoglycosides (aadA1, aadA2, aadA22, or aadA23), trimethoprim (dfrA5, dfrA12, or dfrA17), and lincosamide (linF). Genes encoding β-lactamases were not found in class 1 integrons. This study is the first to report ESBL-producing E. coli with a class 1 integron carrying the linF gene cassette in swine in Thailand. Our findings confirm that swine can be a reservoir of ESBL-producing E. coli harboring class 1 integrons, which may become a potential health risk if these integrons are transmitted to humans. Intensive analyses of animal, human, and environmental isolates are needed to control the spread of ESBL-producing E. coli strains.

scholarly journals BEL-1, a Novel Clavulanic Acid-Inhibited Extended-Spectrum β-Lactamase, and the Class 1 Integron In120 in Pseudomonas aeruginosa

2005 ◽  
Vol 49 (9) ◽  
pp. 3743-3748 ◽  
Author(s):  
Laurent Poirel ◽  
Laura Brinas ◽  
Annemie Verlinde ◽  
Louis Ide ◽  
Patrice Nordmann
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Clavulanic Acid ◽  
Cloning And Sequencing ◽  
Class 1 Integron ◽  
Gene Cassettes ◽  
Esbl Gene ◽  
Class A ◽  
Class 1 ◽  
Synergy Test ◽  
Specific Sequences

ABSTRACT Screening by a double-disk synergy test identified a Pseudomonas aeruginosa isolate that produced a clavulanic acid-inhibited expanded-spectrum β-lactamase (ESBL). Cloning and sequencing identified a novel ESBL, BEL-1, weakly related to other Ambler class A ESBLs. β-Lactamase BEL-1 hydrolyzed significantly most expanded-spectrum cephalosporins and aztreonam, and its activity was inhibited by clavulanic acid, tazobactam, cefoxitin, moxalactam, and imipenem. This chromosome-encoded ESBL gene was embedded in a class 1 integron containing three other gene cassettes. In addition, this integron was bracketed by Tn1404 transposon sequences at its right end and by P. aeruginosa-specific sequences at its left end.

Molecular Detection of Class 1 Integron-Associated Gene Cassettes in KPC-2-Producing Klebsiella pneumoniae Clones by Whole-Genome Sequencing

2019 ◽  
Vol 25 (8) ◽  
pp. 1127-1131 ◽  
Author(s):  
Bruna Fuga ◽  
Sabrina Royer ◽  
Paola Amaral de Campos ◽  
Melina Lorraine Ferreira ◽  
Iara Rossi ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Molecular Detection ◽  
Whole Genome ◽  
Class 1 Integron ◽  
Gene Cassettes ◽  
Class 1

scholarly journals Molecular Characterization of a New Class 3 Integron in Klebsiella pneumoniae

2003 ◽  
Vol 47 (9) ◽  
pp. 2838-2843 ◽  
Author(s):  
Mário Correia ◽  
Filipa Boavida ◽  
Filipa Grosso ◽  
M. J. Salgado ◽  
L. M. Lito ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Gene Cassette ◽  
Promoter Regions ◽  
Fusion Event ◽  
Integrase Gene ◽  
Gene Cassettes ◽  
New Class ◽  
Extended Spectrum ◽  
Class 1 ◽  
Cephalosporin Resistance

ABSTRACT Klebsiella pneumoniae FFUL 22K was isolated in April 1999 from the urine of an intensive care unit patient in Portugal. The strain showed an extended-spectrum cephalosporin resistance profile. A typical synergistic effect between cefotaxime or cefepime and clavulanic acid was observed. An Escherichia coli transformant displayed a similar resistance phenotype and harbored a ca. 9.4-kb plasmid (p22K9). Cloning experiments revealed that the extended-spectrum β-lactamase was encoded by bla GES-1, previously described in class 1 integrons from K. pneumoniae ORI-1 and Pseudomonas aeruginosa Pa695. Further sequence analysis demonstrated that the bla GES-1 gene cassette was located on a new class 3 integron. The integron was 2,863 bp long and consisted of an intI3 integrase gene, an attI3 recombination site, two promoter regions, and two gene cassettes. The IntI3 integrase was 98.8% identical to that of Serratia marcescens AK9373. The bla GES-1 gene cassette was inserted at the attI3 site. The second gene cassette was the result of a fusion event between bla OXA-10-type and aac(6′)-Ib gene cassettes and conferred resistance to kanamycin. This is the second class 3 integron reported and the first time that the bla GES-1 gene cassette has been found on an integron belonging to this class, highlighting the considerable heterogeneity of their genetic environment and the spread of gene cassettes among different classes of integrons.

scholarly journals PER-6, an Extended-Spectrum β-Lactamase from Aeromonas allosaccharophila

2010 ◽  
Vol 54 (4) ◽  
pp. 1619-1622 ◽  
Author(s):  
Delphine Girlich ◽  
Laurent Poirel ◽  
Patrice Nordmann
Keyword(s):  
Amino Acid ◽  
Amino Acid Identity ◽  
Environmental Isolate ◽  
Kinetic Properties ◽  
Seine River ◽  
Acid Identity ◽  
Extended Spectrum

ABSTRACT An Aeromonas allosaccharophila environmental isolate recovered from the Seine River (Paris, France) produced a novel extended-spectrum β-lactamase, PER-6, that shared 92% amino acid identity with the closest ß-lactamase, PER-2. The kinetic properties of PER-6 showed a slightly increased affinity for carbapenems. The bla PER-6 gene was chromosomally located and bracketed by non-transposon-related structures.

scholarly journals The aadB Gene Cassette Is Associated with blaSHV Genes in Klebsiella Species Producing Extended-Spectrum β-Lactamases

2005 ◽  
Vol 49 (2) ◽  
pp. 794-797 ◽  
Author(s):  
Louisa A. Jones ◽  
Christopher J. McIver ◽  
Mi-Jurng Kim ◽  
William D. Rawlinson ◽  
Peter A. White
Keyword(s):  
Gene Cassette ◽  
Amplicon Sequencing ◽  
Klebsiella Species ◽  
Class 1 Integron ◽  
Beta Lactamases ◽  
Gene Cassettes ◽  
Extended Spectrum ◽  
Class 1 ◽  
Extended Spectrum Beta Lactamases

ABSTRACT Integrons were detected in 37 (72.5%) of 51 Klebsiella spp. producing extended-spectrum beta-lactamases by PCR with primers that targeted integrase genes and cassette regions. PCR and amplicon sequencing of the cassette regions revealed aadB and aadA2 gene cassettes that confer resistance to a range of aminoglycosides. aadB was associated with a class 1 integron on a 28-kb plasmid, pES1, that also contained bla SHV-12 and IS26.

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