Reference: Mageswaran SK, et al. (2015) Constitutively active ESCRT-II suppresses the MVB-sorting phenotype of ESCRT-0 and ESCRT-I mutants. Mol Biol Cell 26(3):554-68

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Abstract


The endosomal sorting complex required for transport (ESCRT) protein complexes function at the endosome in the formation of intraluminal vesicles (ILVs) containing cargo proteins destined for the vacuolar/lysosomal lumen. The early ESCRTs (ESCRT-0 and -I) are likely involved in cargo sorting, whereas ESCRT-III and Vps4 function to sever the neck of the forming ILVs. ESCRT-II links these functions by initiating ESCRT-III formation in an ESCRT-I-regulated manner. We identify a constitutively active mutant of ESCRT-II that partially suppresses the phenotype of an ESCRT-I or ESCRT-0 deletion strain, suggesting that these early ESCRTs are not essential and have redundant functions. However, the ESCRT-III/Vps4 system alone is not sufficient for ILV formation but requires cargo sorting mediated by one of the early ESCRTs.

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Journal Article
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Mageswaran SK, Johnson NK, Odorizzi G, Babst M
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