Titre :

Rv0613c/MSMEG_1285 Interacts with HBHA and Mediates Its Proper Cell-Surface Exposure in Mycobacteria

Auteur(s) :

Veyron-Churlet, Romain [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Dupres, Vincent [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Saliou, Jean-Michel [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Lafont, Frank [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Raze, Dominique [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]
Locht, Camille [Auteur]
Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204 [CIIL]

Titre de la revue :

International Journal of Molecular Sciences

Pagination :

1673

Éditeur :

MDPI

Date de publication :

2018

ISSN :

1661-6596

Mot(s)-clé(s) en anglais :

tuberculosis
Mycobacterium
host-pathogen interaction
adhesin
cell wall

Discipline(s) HAL :

Sciences du Vivant [q-bio]/Microbiologie et Parasitologie/Bactériologie
Sciences du Vivant [q-bio]/Médecine humaine et pathologie/Maladies infectieuses

Résumé en anglais : [en]

Heparin-binding haemagglutinin (HBHA) is a surface-exposed virulence factor of Mycobacterium tuberculosis and is involved in the binding of mycobacteria to non-phagocytic cells, allowing for extra-pulmonary dissemination ...
Lire la suite >Heparin-binding haemagglutinin (HBHA) is a surface-exposed virulence factor of Mycobacterium tuberculosis and is involved in the binding of mycobacteria to non-phagocytic cells, allowing for extra-pulmonary dissemination of the bacilli. Despite its surface exposure, HBHA is not produced as a pre-protein containing a typical cleavable N-terminal signal peptide and is thus likely secreted by a Sec-independent, as of yet unknown mechanism. Here, we used the bacterial adenylate cyclase two-hybrid system to identify the proteins encoded by rv0613c and mmpL14 as being able to interact with HBHA. Our study was focused on Rv0613c, as it showed more consistent interactions with HBHA than MmpL14. Deletion of its orthologous gene MSMEG_1285 in recombinant Mycobacterium smegmatis producing HBHA from M. tuberculosis resulted in the loss of proper surface exposure of HBHA, as evidenced by atomic force microscopy. Furthermore, the lack of MSMEG_1285 also abolished the clumping phenotype and rough colony morphology of the recombinant M. smegmatis and reduced its adherence to A549 epithelial cells. These phenotypes have previously been associated with surface-exposed HBHA. Thus, MSMEG_1285 is directly involved in the proper cell-surface exposure of HBHA. These observations identify MSMEG_1285/Rv0613c as the first accessory protein involved in the cell surface exposure of HBHALire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Projet ANR :

Plateau de microscopie de criblage à haut débit et d'analyse à très haute résolution

Collections :

• Centre d'Infection et d'Immunité de Lille (CIIL) - U1019 - UMR 9017

Source :

Harvested from HAL