The circuitry of cargo flux in the ESCRT pathway
نویسندگان
چکیده
The endosomal sorting complex required for transport (ESCRT) complexes sort ubiquitinated membrane proteins into multivesicular bodies, which is a key step in the lysosomal degradation pathway. Shields et al. (Shields, S.B., A.J. Oestreich, S. Winistorfer, D. Nguyen, J.A. Payne, D.J. Katzmann, and R. Piper. 2009. J. Cell Biol. 185:213-224) identify a new ubiquitin-binding site in ESCRT-I and provide evidence that the upstream ESCRT-I and -II complexes sort cargo in parallel rather than in series.
منابع مشابه
Ordered assembly of the ESCRT-III complex on endosomes is required to sequester cargo during MVB formation.
The sequential action of the Vps27/HRS complex, ESCRT-I, -II, and -III is required to sort ubiquitinated transmembrane proteins to the lumen of lysosomes via the multivesicular body (MVB) pathway. While Vps27/HRS, ESCRT-I, and -II are recruited to endosomes as preformed complexes, the ESCRT-III subunits Vps20, Snf7, Vps24, and Vps2 only assemble into a complex on endosomes. We have addressed th...
متن کاملStructural studies of phosphoinositide 3-kinase-dependent traffic to multivesicular bodies.
Three large protein complexes known as ESCRT I, ESCRT II and ESCRT III drive the progression of ubiquitinated membrane cargo from early endosomes to lysosomes. Several steps in this process critically depend on PtdIns3P, the product of the class III phosphoinositide 3-kinase. Our work has provided insights into the architecture, membrane recruitment and functional interactions of the ESCRT mach...
متن کاملRab28 function in trypanosomes: interactions with retromer and ESCRT pathways.
Early endosomal cargo is typically targeted to either a degradative or recycling pathway. Despite established functions for the retromer and ESCRT complexes at late endosomes/multivesicular bodies, the mechanisms integrating and coordinating these functions remain largely unknown. Rab family GTPases are key membrane trafficking organizers and could contribute. Here, in the unicellular organism ...
متن کاملESCRT-II coordinates the assembly of ESCRT-III filaments for cargo sorting and multivesicular body vesicle formation.
The sequential action of five distinct endosomal-sorting complex required for transport (ESCRT) complexes is required for the lysosomal downregulation of cell surface receptors through the multivesicular body (MVB) pathway. On endosomes, the assembly of ESCRT-III is a highly ordered process. We show that the length of ESCRT-III (Snf7) oligomers controls the size of MVB vesicles and addresses ho...
متن کاملRegulation of ubiquitin-dependent cargo sorting by multiple endocytic adaptors at the plasma membrane.
Endocytic protein trafficking is directed by sorting signals on cargo molecules that are recognized by cytosolic adaptor proteins. However, the steps necessary to segregate the variety of cargoes during endocytosis remain poorly defined. Using Caenorhabditis elegans, we demonstrate that multiple plasma membrane endocytic adaptors function redundantly to regulate clathrin-mediated endocytosis an...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره 185 شماره
صفحات -
تاریخ انتشار 2009