title: ESCRT-III subunits Snf7-1 and Snf7-2 differentially regulate transmembrane cargos in hESC-derived human neurons.
abstract: BACKGROUND
  Endosomal sorting complex required for transport (ESCRT) is involved in several fundamental cellular processes and human diseases. Many mammalian ESCRT proteins have multiple isoforms but their precise functions remain largely unknown, especially in human neurons.
  
  
  RESULTS
  In this study, we differentiated human embryonic stem cells (hESCs) into postmitotic neurons and characterized the functional properties of these neurons. Moreover, we found that among the three human paralogs of the yeast ESCRT-III subunit Snf7, hSnf7-1 and hSnf7-2 are most abundantly expressed in human neurons. Both hSnf7-1 and hSnf7-2 are required for the survival of human neurons, indicating a non-redundant essential function. Indeed, hSnf7-1 and hSnf7-2 are preferentially associated with CHMP2A and CHMP2B, respectively, and regulate the turnover of distinct transmembrane cargos such as neurotransmitter receptors in human neurons.
  
  
  CONCLUSIONS
  These findings indicate that different mammalian paralogs of the yeast ESCRT-III subunit Snf7 have non-redundant functions in human neurons, suggesting that ESCRT-III with distinct subunit compositions may preferentially regulate different cargo proteins.
authors.affiliation: Department of Biotechnology, College of Life Science and Nanotechnology, Hannam University, Dajeon 305-811, Korea. leeja@hnu.kr
authors.forename: Jin-A
authors.initials: JA
authors.lastname: Lee
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Robyn
authors.initials: R
authors.lastname: Javier
authors.forename: Anatol C
authors.initials: AC
authors.lastname: Kreitzer
authors.forename: Celine
authors.initials: C
authors.lastname: Delaloy
authors.forename: Fen-Biao
authors.initials: FB
authors.lastname: Gao
mesh_terms: D000818:Animals; D001692:Biological Transport; D002454:Cell Differentiation; D002462:Cell Membrane / Q000378:metabolism*; D002470:Cell Survival; D053595:Embryonic Stem Cells / Q000166:cytology*; D056827:Endosomal Sorting Complexes Required for Transport / Q000235:genetics / Q000378:metabolism*; D005786:Gene Expression Regulation; D006801:Humans; D051379:Mice; D008938:Mitosis; D009474:Neurons / Q000166:cytology* / Q000378:metabolism*; D010588:Phagosomes / Q000378:metabolism; D021122:Protein Subunits / Q000378:metabolism*
chemical_list: C481529:CHMP4A protein, human; C478397:CHMP4B protein, human; D056827:Endosomal Sorting Complexes Required for Transport; D021122:Protein Subunits