Role of an arginine–lysine rich motif in maturation and trafficking of CD19
2015
Vences-Catalán, Felipe | Kuo, Chiung-Chi | Levy, Shoshana
Normal expression of CD19 on the surface of B cells requires the presence of the tetraspanin molecule CD81. Previous studies have shown that surface expression of CD19 is highly reduced in CD81-deficient mouse B cells and that it is completely absent in an antibody deficient human patient with a mutation in the CD81 gene. The current study explored the contribution of an arginine–lysine rich motif, present in the membrane-proximal cytoplasmic domain of CD19, for the maturation and trafficking of this molecule. We demonstrate that this motif plays a role in the maturation and recycling of CD19 but in a CD81-independent manner.
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