Bioinformatic Analysis of the Campylobacter jejuni Type VI Secretion System and Effector Prediction
The Type VI Secretion System (T6SS) has important roles relating to bacterial antagonism, subversion of host cells, and niche colonisation. Campylobacter jejuni is one of the leading bacterial causes of human gastroenteritis worldwide and is a commensal coloniser of birds. Although recently discover...
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doaj-21b61032d04f486d9618505c11c964572021-07-02T13:00:48ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2021-06-011210.3389/fmicb.2021.694824694824Bioinformatic Analysis of the Campylobacter jejuni Type VI Secretion System and Effector PredictionLuca Robinson0Janie Liaw1Zahra Omole2Dong Xia3Arnoud H. M. van Vliet4Nicolae Corcionivoschi5Nicolae Corcionivoschi6Abderrahman Hachani7Ozan Gundogdu8Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, United KingdomFaculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, United KingdomFaculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, United KingdomComparative Biomedical Sciences, Royal Veterinary College, London, United KingdomSchool of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Guildford, United KingdomBacteriology Branch, Veterinary Sciences Division, Agri-Food and Biosciences Institute, Belfast, United KingdomBioengineering of Animal Science Resources, Banat University of Agricultural Sciences and Veterinary Medicine – King Michael the I of Romania, Timisoara, RomaniaThe Peter Doherty Institute for Infection and Immunity, Department of Microbiology and Immunology, University of Melbourne, Melbourne, VIC, AustraliaFaculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, United KingdomThe Type VI Secretion System (T6SS) has important roles relating to bacterial antagonism, subversion of host cells, and niche colonisation. Campylobacter jejuni is one of the leading bacterial causes of human gastroenteritis worldwide and is a commensal coloniser of birds. Although recently discovered, the T6SS biological functions and identities of its effectors are still poorly defined in C. jejuni. Here, we perform a comprehensive bioinformatic analysis of the C. jejuni T6SS by investigating the prevalence and genetic architecture of the T6SS in 513 publicly available genomes using C. jejuni 488 strain as reference. A unique and conserved T6SS cluster associated with the Campylobacter jejuni Integrated Element 3 (CJIE3) was identified in the genomes of 117 strains. Analyses of the T6SS-positive 488 strain against the T6SS-negative C. jejuni RM1221 strain and the T6SS-positive plasmid pCJDM202 carried by C. jejuni WP2-202 strain defined the “T6SS-containing CJIE3” as a pathogenicity island, thus renamed as Campylobacter jejuni Pathogenicity Island-1 (CJPI-1). Analysis of CJPI-1 revealed two canonical VgrG homologues, CJ488_0978 and CJ488_0998, harbouring distinct C-termini in a genetically variable region downstream of the T6SS operon. CJPI-1 was also found to carry a putative DinJ-YafQ Type II toxin-antitoxin (TA) module, conserved across pCJDM202 and the genomic island CJIE3, as well as several open reading frames functionally predicted to encode for nucleases, lipases, and peptidoglycan hydrolases. This comprehensive in silico study provides a framework for experimental characterisation of T6SS-related effectors and TA modules in C. jejuni.https://www.frontiersin.org/articles/10.3389/fmicb.2021.694824/fullCampylobacter jejuniType VI Secretion SystemT6SS effectorsT6SS immunity proteinstoxin-antitoxinpathogenicity island |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Luca Robinson Janie Liaw Zahra Omole Dong Xia Arnoud H. M. van Vliet Nicolae Corcionivoschi Nicolae Corcionivoschi Abderrahman Hachani Ozan Gundogdu |
spellingShingle |
Luca Robinson Janie Liaw Zahra Omole Dong Xia Arnoud H. M. van Vliet Nicolae Corcionivoschi Nicolae Corcionivoschi Abderrahman Hachani Ozan Gundogdu Bioinformatic Analysis of the Campylobacter jejuni Type VI Secretion System and Effector Prediction Frontiers in Microbiology Campylobacter jejuni Type VI Secretion System T6SS effectors T6SS immunity proteins toxin-antitoxin pathogenicity island |
author_facet |
Luca Robinson Janie Liaw Zahra Omole Dong Xia Arnoud H. M. van Vliet Nicolae Corcionivoschi Nicolae Corcionivoschi Abderrahman Hachani Ozan Gundogdu |
author_sort |
Luca Robinson |
title |
Bioinformatic Analysis of the Campylobacter jejuni Type VI Secretion System and Effector Prediction |
title_short |
Bioinformatic Analysis of the Campylobacter jejuni Type VI Secretion System and Effector Prediction |
title_full |
Bioinformatic Analysis of the Campylobacter jejuni Type VI Secretion System and Effector Prediction |
title_fullStr |
Bioinformatic Analysis of the Campylobacter jejuni Type VI Secretion System and Effector Prediction |
title_full_unstemmed |
Bioinformatic Analysis of the Campylobacter jejuni Type VI Secretion System and Effector Prediction |
title_sort |
bioinformatic analysis of the campylobacter jejuni type vi secretion system and effector prediction |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Microbiology |
issn |
1664-302X |
publishDate |
2021-06-01 |
description |
The Type VI Secretion System (T6SS) has important roles relating to bacterial antagonism, subversion of host cells, and niche colonisation. Campylobacter jejuni is one of the leading bacterial causes of human gastroenteritis worldwide and is a commensal coloniser of birds. Although recently discovered, the T6SS biological functions and identities of its effectors are still poorly defined in C. jejuni. Here, we perform a comprehensive bioinformatic analysis of the C. jejuni T6SS by investigating the prevalence and genetic architecture of the T6SS in 513 publicly available genomes using C. jejuni 488 strain as reference. A unique and conserved T6SS cluster associated with the Campylobacter jejuni Integrated Element 3 (CJIE3) was identified in the genomes of 117 strains. Analyses of the T6SS-positive 488 strain against the T6SS-negative C. jejuni RM1221 strain and the T6SS-positive plasmid pCJDM202 carried by C. jejuni WP2-202 strain defined the “T6SS-containing CJIE3” as a pathogenicity island, thus renamed as Campylobacter jejuni Pathogenicity Island-1 (CJPI-1). Analysis of CJPI-1 revealed two canonical VgrG homologues, CJ488_0978 and CJ488_0998, harbouring distinct C-termini in a genetically variable region downstream of the T6SS operon. CJPI-1 was also found to carry a putative DinJ-YafQ Type II toxin-antitoxin (TA) module, conserved across pCJDM202 and the genomic island CJIE3, as well as several open reading frames functionally predicted to encode for nucleases, lipases, and peptidoglycan hydrolases. This comprehensive in silico study provides a framework for experimental characterisation of T6SS-related effectors and TA modules in C. jejuni. |
topic |
Campylobacter jejuni Type VI Secretion System T6SS effectors T6SS immunity proteins toxin-antitoxin pathogenicity island |
url |
https://www.frontiersin.org/articles/10.3389/fmicb.2021.694824/full |
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