title: AcuC, a histone deacetylase, contributes to the pathogenicity of Aeromonas hydrophila.
abstract: The interactions of pathogens and phagocytes are complex. Our study demonstrated that Aeromonas hydrophila B11 can survive in the macrophagocytes of Tilapia mossambica. To explore the regulatory processes of A. hydrophila survival in the macrophagocytes, we used the mini-Tn10 transposon mutagenesis system to build a mutant library by mixing Escherichia coli Sm10 (pLOFKm) and A. hydrophila B11. In total, 102 mutant colonies were detected, and 11 of them showed reduced survival in macrophagocytes. The mutant with the most severe phenotype, AM73, was chosen for further research. The ORF interrupted by mini-Tn10 in AM73 was approximately 960 bp and was deposited in GenBank with the accession number SRP049226. The 319 amino acid protein encoded by the ORF showed a high degree of identity (89%) with proteins in the histone deacetylase/AcuC/AphA family of A. hydrophila subsp. hydrophila ATCC7966. A strain (AC73) in which the acuC mutation was complemented was constructed by generating the recombinant expression plasmid pACYC184-acuC and introducing it into the AM73 mutant strain. Our experiments revealed that strain AM73 was deficient in biofilm formation, adhesion, survival in macrophagocytes, and virulence compared with A. hydrophila B11, and all of these biological properties were improved in strain AC73. The expression of 10 significant virulence genes was significantly inhibited in strain AM73. The results indicated that AcuC was an important regulatory protein contributing to the pathogenicity of A. hydrophila.
authors.affiliation: Fisheries College, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Jimei University, Xiamen, China.
authors.forename: Qingling
authors.initials: Q
authors.lastname: Jiang
authors.affiliation: Fisheries College, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Jimei University, Xiamen, China.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Chen
authors.affiliation: Fisheries College, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Jimei University, Xiamen, China.
authors.forename: Yingxue
authors.initials: Y
authors.lastname: Qin
authors.affiliation: Fisheries College, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Jimei University, Xiamen, China.
authors.forename: Lixing
authors.initials: L
authors.lastname: Huang
authors.affiliation: Fisheries College, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Jimei University, Xiamen, China.
authors.forename: Xiaojin
authors.initials: X
authors.lastname: Xu
authors.affiliation: Fisheries College, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Jimei University, Xiamen, China.
authors.forename: Lingmin
authors.initials: L
authors.lastname: Zhao
authors.affiliation: Fisheries College, Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Jimei University, Xiamen, China.|State Key Laboratory of Large Yellow Croaker Breeding, Ningde, China.
authors.forename: Qingpi
authors.identifier: 0000-0001-8698-3121
authors.initials: Q
authors.lastname: Yan
mesh_terms: D016980:Aeromonas hydrophila / Q000201:enzymology* / Q000235:genetics / Q000472:pathogenicity*; D000818:Animals; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D004251:DNA Transposable Elements; D055786:Gene Knockout Techniques; D053263:Gene Regulatory Networks; D005816:Genetic Complementation Test; D006655:Histone Deacetylases / Q000235:genetics / Q000378:metabolism*; D050296:Microbial Viability; D016254:Mutagenesis, Insertional; D016366:Open Reading Frames; D010586:Phagocytes / Q000276:immunology / Q000382:microbiology*; D018085:Regulon; D017210:Tilapia / Q000276:immunology / Q000382:microbiology*; D014774:Virulence; D037521:Virulence Factors / Q000235:genetics / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D004251:DNA Transposable Elements; D037521:Virulence Factors; D006655:Histone Deacetylases
keywords: 
  Aeromonas hydrophila
  ; histone deacetylase AcuC; intracellular survival; pathogenicity; phagocytes