IcmF2 of the type VI secretion system 2 plays a role in biofilm formation of Vibrio parahaemolyticus.
Biofilm formation
IcmF2
Regulation
T6SS2
Vibrio parahaemolyticus
c-di-GMP
Journal
Archives of microbiology
ISSN: 1432-072X
Titre abrégé: Arch Microbiol
Pays: Germany
ID NLM: 0410427
Informations de publication
Date de publication:
22 Jun 2024
22 Jun 2024
Historique:
received:
09
05
2024
accepted:
18
06
2024
revised:
17
06
2024
medline:
22
6
2024
pubmed:
22
6
2024
entrez:
22
6
2024
Statut:
epublish
Résumé
Vibrio parahaemolyticus possesses two distinct type VI secretion systems (T6SS), namely T6SS1 and T6SS2. T6SS1 is predominantly responsible for adhesion to Caco-2 and HeLa cells and for the antibacterial activity of V. parahaemolyticus, while T6SS2 mainly contributes to HeLa cell adhesion. However, it remains unclear whether the T6SS systems have other physiological roles in V. parahaemolyticus. In this study, we demonstrated that the deletion of icmF2, a structural gene of T6SS2, reduced the biofilm formation capacity of V. parahaemolyticus under low salt conditions, which was also influenced by the incubation time. Nonetheless, the deletion of icmF2 did not affect the biofilm formation capacity in marine-like growth conditions, nor did it impact the flagella-driven swimming and swarming motility of V. parahaemolyticus. IcmF2 was found to promote the production of the main components of the biofilm matrix, including extracellular DNA (eDNA) and extracellular proteins, and cyclic di-GMP (c-di-GMP) in V. parahaemolyticus. Additionally, IcmF2 positively influenced the transcription of cpsA, mfpA, and several genes involved in c-di-GMP metabolism, including scrJ, scrL, vopY, tpdA, gefA, and scrG. Conversely, the transcription of scrA was negatively impacted by IcmF2. Therefore, IcmF2-dependent biofilm formation was mediated through its effects on the production of eDNA, extracellular proteins, and c-di-GMP, as well as its impact on the transcription of cpsA, mfpA, and genes associated with c-di-GMP metabolism. This study confirmed new physiological roles for IcmF2 in promoting biofilm formation and c-di-GMP production in V. parahaemolyticus.
Identifiants
pubmed: 38907796
doi: 10.1007/s00203-024-04060-x
pii: 10.1007/s00203-024-04060-x
doi:
Substances chimiques
Type VI Secretion Systems
0
Bacterial Proteins
0
Cyclic GMP
H2D2X058MU
bis(3',5')-cyclic diguanylic acid
61093-23-0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
321Subventions
Organisme : Special Project on Clinical Medicine of Nantong University
ID : 2023JQ011
Organisme : Special Project on Clinical Medicine of Nantong University
ID : 2023JQ017
Organisme : Research Project of Nantong Health Commission
ID : QN2023032
Informations de copyright
© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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