CELL INVASION, HGF RECEPTOR LIGAND, LEUCINE-RICH REPEAT, LEUCINE RICH REPEAT, LRR, C-MET LIGAND, VIRULENCE FACTOR INLB321_4R: S199R, D200R, G206R, A227R, C242A MUTANT OF THE LISTERIA MONOCYTOGENES INLB INTERNALIN DOMAIN 2WQX