Rab5 is a key regulator of the early endosome compartment and plays a crucial role in the control of endocytosis and membrane trafficking within the cell. It is one of the primary determinants of early endosomes, functioning as an important modulator of endosome progression and maturation. Rab5 orchestrates the fusion of endocytic vesicles with early endosomes and is involved in the recruitment of various effector proteins that facilitate vesicle docking, fusion, and the regulation of endosome motility along the cytoskeleton. The transition from early to late endosomes is regulated by a switch from Rab5 to Rab7, where Rab5 is gradually replaced by Rab7 on the same endosome. This transition is critical for the sorting of internalized cargo and the maturation of endosomes into multivesicular bodies. Rab5's activity is also associated with the regulation of hematopoietic homeostasis, as its inhibition can lead to cell overproliferation and disruptions in blood cell progenitor maintenance, highlighting its importance in cellular signaling pathways.
中文
