Component of the ESCRT-I complex, a regulator of vesicular trafficking process. Required for the sorting of endocytic ubiquitinated cargos into multivesicular bodies. May be involved in cell growth and differentiation.
Late endosome membrane; Peripheral membrane protein. Nucleus.
Widely expressed. Examined tissues include heart, brain, placenta, liver, skeletal muscle, kidney and pancreas. More abundant in liver. Strongly decreased or undetected in hepatomas.
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