Article (Scientific journals)
Development of Nanobodies as Theranostic Agents against CMY-2-Like Class C b-Lactamases
Cawez, Frédéric; Mercuri, Paola; Morales Yánez, Francisco Javier et al.
2023In Antimicrobial Agents and Chemotherapy
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Keywords :
nanobodies; paratopes; antibiotic resistance; CMY-2 b-lactamase; new antibiotic scaffold; class C beta-lactamase; structural biology
Abstract :
[en] Three soluble single-domain fragments derived from the unique variable region of camelid heavy-chain antibodies (VHHs) against the CMY-2 b-lactamase behaved as inhibitors. The structure of the complex VHH cAbCMY-2(254)/CMY-2 showed that the epitope is close to the active site and that the CDR3 of the VHH protrudes into the catalytic site. The b-lactamase inhibition pattern followed a mixed profile with a predominant noncompetitive component. The three isolated VHHs recognized overlapping epitopes since they behaved as competitive binders. Our study identified a binding site that can be targeted by a new class of b-lactamase inhibitors designed on the sequence of the paratope. Furthermore, the use of mono- or bivalent VHH and rabbit polyclonal anti- CMY-2 antibodies enables the development of the first generation of enzyme-linked immunosorbent assay (ELISA) for the detection of CMY-2 produced by CMY-2-expressing bacteria, irrespective of resistotype.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Cawez, Frédéric ;  Université de Liège - ULiège > Integrative Biological Sciences (InBioS)
Mercuri, Paola ;  Université de Liège - ULiège > Département des sciences de la vie > Macromolécules biologiques
Morales Yánez, Francisco Javier ;  Université de Liège - ULiège > Integrative Biological Sciences (InBioS)
Maalouf, Rita ;  Université de Liège - ULiège > Département des sciences de la vie > Enzymologie et repliement des protéines
Vandevenne, Marylène ;  Université de Liège - ULiège > Integrative Biological Sciences (InBioS)
Kerff, Frédéric  ;  Université de Liège - ULiège > Département des sciences de la vie > Centre d'Ingénierie des Protéines (CIP)
Guérin, Virginie ;  Université de Liège - ULiège > Fundamental and Applied Research for Animals and Health (FARAH) > FARAH: Santé publique vétérinaire
Mainil, Jacques ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI)
Thiry, Damien ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI) > Bactériologie vétérinaire et maladies bactériennes animales
Saulmont, Marc
Vanderplasschen, Alain ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires (DMI) > Immunologie vétérinaire
Lafaye, Pierre
Aymé, Gabriel
Bogaerts, Pierre
Dumoulin, Mireille  ;  Université de Liège - ULiège > Integrative Biological Sciences (InBioS)
Galleni, Moreno ;  Université de Liège - ULiège > Département des sciences de la vie > Macromolécules biologiques
More authors (6 more) Less
Language :
English
Title :
Development of Nanobodies as Theranostic Agents against CMY-2-Like Class C b-Lactamases
Publication date :
2023
Journal title :
Antimicrobial Agents and Chemotherapy
ISSN :
0066-4804
eISSN :
1098-6596
Publisher :
American Society for Microbiology, Washington, United States - District of Columbia
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 May 2023

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