LAMP1 and LAMP2A localise to axonal organelles with distinct motility dynamics and partially overlapping molecular signatures in human neurons
Abouward, Reem
;
Abdelhafid, Alya Masoud
;
Wilkins, Oscar G.
;
Lee, Song-yi
;
Ibrahim, Fairouz
;
Skehel, Mark J.
;
Ting, Alice Y.
;
Birsa, Nicol
;
Ule, Jernej
;
Schiavo, Giampietro G.
LAMP1 and LAMP2A (an isoform of LAMP2) are abundant proteins of late endosomal/lysosomal compartments that are often used interchangeably to label what is assumed to be the same organelle population, potentially obscuring distinct physiological roles. Here, we characterised the axonal transport dynamics of LAMP1-and LAMP2A-positive compartments in human induced pluripotent stem cell (hiPSC)-derived cortical neurons. We found that LAMP1-positive organelles move slower in the retrograde direction,