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Chen H, Tao S, Li N, Wang F, Wang L, Tang Y, Liang W. Functional comparison of anti-restriction and anti-methylation activities of ArdA, KlcA, and KlcAHS from Klebsiella pneumoniae. Front Cell Infect Microbiol 2022; 12:916547. [PMID: 35967855 PMCID: PMC9366191 DOI: 10.3389/fcimb.2022.916547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 07/04/2022] [Indexed: 11/13/2022] Open
Abstract
Anti-restriction proteins are typically encoded by plasmids, conjugative transposons, or phages to improve their chances of entering a new bacterial host with a type I DNA restriction and modification (RM) system. The invading DNA is normally destroyed by the RM system. The anti-restriction proteins ArdA, KlcA, and their homologues are usually encoded on plasmid of carbapenemase-resistant Klebsiella pneumoniae. We found that the plasmid sequence and restriction proteins affected horizontal gene transfer, and confirmed the anti-restriction and anti-methylation activities of ArdA and KlcA during transformation and transduction. Among the three anti-restriction proteins, ArdA shows stronger anti-restriction and anti-methylation effects, and KlcAHS was weaker. KlcA shows anti-methylation only during transformation. Understanding the molecular mechanism underlying the clinical dissemination of K. pneumoniae and other clinically resistant strains from the perspective of restrictive and anti-restrictive systems will provide basic theoretical support for the prevention and control of multidrug-resistant bacteria, and new strategies for delaying or even controlling the clinical dissemination of resistant strains in the future.
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Affiliation(s)
- Huimin Chen
- Medical School of Jiangsu University, Zhenjiang, China
| | - Shuan Tao
- Medical School of Jiangsu University, Zhenjiang, China
| | - Na Li
- Department of Laboratory Medicine, Bengbu Medical College, Bengbu, China
| | - Fang Wang
- Department of Central Laboratory, Lianyungang Second People Hospital, Lianyungang, China
| | - Lei Wang
- School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Yu Tang
- Department of Laboratory Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
- *Correspondence: Wei Liang, ; Yu Tang,
| | - Wei Liang
- Lianyungang Clinical College of Jiangsu University, Lianyungang, China
- *Correspondence: Wei Liang, ; Yu Tang,
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