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© Pierre Gounon
Entrée de Listeria dans une cellule épithéliale (Grossissement X 10000). Image colorisée.
Publication : Infection and immunity

The inlA gene of Listeria monocytogenes LO28 harbors a nonsense mutation resulting in release of internalin

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Infection and immunity - 01 Jul 1998

Jonquières R, Bierne H, Mengaud J, Cossart P

Link to Pubmed [PMID] – 9632615

Infect. Immun. 1998 Jul;66(7):3420-2

Internalin is a surface protein that mediates entry of Listeria monocytogenes EGD into epithelial cells expressing the cell adhesion molecule human E-cadherin or its chicken homolog, L-CAM, which act as receptors for internalin. After observing that entry of L. monocytogenes LO28 into S180 fibroblasts, in contrast to that of EGD, did not increase after transfection with L-CAM, we examined both the expression and the structure of internalin in strain LO28. We discovered a nonsense mutation in inlA which results in a truncated protein released in the culture medium. Mutations leading to release of internalin were also detected in clinical and food isolates. These results question the role of internalin as a virulence factor in murine listeriosis.

http://www.ncbi.nlm.nih.gov/pubmed/9632615