Which lysosomal membrane protein is required for fusion with phagosomes?
Phagosome maturation in macrophages and neutrophils converts a nascent bacteria-containing vacuole into a microbicidal phagolysosome through sequential interactions with early endosomes, late endosomes and terminal lysosomes. Acquisition of lysosomal membrane proteins marks progression, with lysosome-associated membrane proteins 1 and 2, LAMP1 and LAMP2, being the most abundant heavily glycosylated proteins delivered to maturing phagosomes, protecting membrane from hydrolases. Studies using LAMP-1 and LAMP-2 knockout mice and combined siRNA show single loss causes mild delay while double defic
Ref: Huynh et al., EMBO Journal 2007: LAMP Proteins Are Required for Fusion of Lysosomes with Phagosomes.