1
|
Pang H, Zhang W, Lin X, Zeng F, Xiao X, Wei Z, Wang S, Jian J, Wang N, Li W. Vibrio alginolyticus PEPCK Mediates Florfenicol Resistance through Lysine Succinylation Modification. J Proteome Res 2024; 23:2397-2407. [PMID: 38904328 DOI: 10.1021/acs.jproteome.4c00085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Protein succinylation modification is a common post-translational modification (PTM) that plays an important role in bacterial metabolic regulation. In this study, quantitative analysis was conducted on the succinylated proteome of wild-type and florfenicol-resistant Vibrio alginolyticus to investigate the mechanism of succinylation regulating antibiotic resistance. Bioinformatic analysis showed that the differentially succinylated proteins were mainly enriched in energy metabolism, and it was found that the succinylation level of phosphoenolpyruvate carboxyl kinase (PEPCK) was highly expressed in the florfenicol-resistant strain. Site-directed mutagenesis was used to mutate the lysine (K) at the succinylation site of PEPCK to glutamic acid (E) and arginine (R), respectively, to investigate the function of lysine succinylation of PEPCK in the florfenicol resistance of V. alginolyticus. The detection of site-directed mutagenesis strain viability under florfenicol revealed that the survival rate of the E mutant was significantly higher than that of the R mutant and wild type, indicating that succinylation modification of PEPCK protein may affect the resistance of V. alginolyticus to florfenicol. This study indicates the important role of PEPCK during V. alginolyticus antibiotic-resistance evolution and provides a theoretical basis for the prevention and control of vibriosis and the development of new antibiotics.
Collapse
Affiliation(s)
- Huanying Pang
- Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture and Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang 524025, Guangdong, China
| | - Weijie Zhang
- Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture and Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang 524025, Guangdong, China
| | - Xuelian Lin
- Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture and Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang 524025, Guangdong, China
| | - Fuyuan Zeng
- Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture and Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang 524025, Guangdong, China
| | - Xing Xiao
- Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture and Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang 524025, Guangdong, China
| | - Zhiqing Wei
- Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture and Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang 524025, Guangdong, China
| | - Shi Wang
- Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture and Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang 524025, Guangdong, China
| | - Jichang Jian
- Fisheries College, Guangdong Ocean University, Zhanjiang 524025, China
- Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture and Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang 524025, Guangdong, China
| | - Na Wang
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Wanxin Li
- School of Public Health, Fujian Medical University, Fujian 350122, China
| |
Collapse
|
2
|
Using transposition to introduce eGFP fusions in Sinorhizobium meliloti: A tool to analyze protein localization patterns in bacteria. J Biotechnol 2017; 257:139-149. [PMID: 28007516 DOI: 10.1016/j.jbiotec.2016.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/14/2016] [Accepted: 12/18/2016] [Indexed: 11/23/2022]
Abstract
Conventional methods used for the in vivo analysis of subcellular protein localizations and their spatio-temporal dynamics in prokaryotes are based on either the engineering of N(amino)- or C(carboxy)-terminal fusions of fluorescent proteins with the protein of interest, or involved probing internal sites for tag integration. In addition, the use of inducible or constitutive promoters for the expression of fluorescent fusion proteins can lead to overexpression and result in localization artifacts. Here, we describe a method for the synthesis of fluorescent fusion proteins using transposable elements, which can randomly integrate in the internal sections of the protein coding sequence to produce full-length fluorescent fusion proteins expressed at endogenous levels. The established method was used for investigating subcellular localization of proteins in the soil bacterium and plant symbiont Sinorhizobium meliloti. Two constructs for transposition-based insertion of the enhanced green fluorescent protein (eGFP), as well as for in vivo excision of the selection marker for the production of full-length proteins were engineered. Conjugation with pHB14 plasmid and induction of the transposition in S. meliloti produced approx. 3.22×104 transconjugant colonies harboring the fluorescent marker with the transposition efficiency of 0.8%. Sixteen randomly targeted proteins of diverse functions, fused to the eGFP were identified and analyzed in living cells by epifluorescence microscopy, demonstrating the suitability of the novel tool for massive, random production of fluorescent proteins and for following of these proteins with different localizations inside the prokaryotic cell.
Collapse
|