2P22

Structure of the Yeast ESCRT-I Heterotetramer Core


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.233 

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This is version 1.6 of the entry. See complete history


Literature

Molecular architecture and functional model of the complete yeast ESCRT-I heterotetramer.

Kostelansky, M.S.Schluter, C.Tam, Y.Y.Lee, S.Ghirlando, R.Beach, B.Conibear, E.Hurley, J.H.

(2007) Cell 129: 485-498

  • DOI: 10.1016/j.cell.2007.03.016
  • Primary Citation of Related Structures:  
    2P22

  • PubMed Abstract: 
  • The endosomal sorting complex required for transport-I (ESCRT-I) complex, which is conserved from yeast to humans, directs the lysosomal degradation of ubiquitinated transmembrane proteins and the budding of the HIV virus. Yeast ESCRT-I contains four subunits, Vps23, Vps28, Vps37, and Mvb12 ...

    The endosomal sorting complex required for transport-I (ESCRT-I) complex, which is conserved from yeast to humans, directs the lysosomal degradation of ubiquitinated transmembrane proteins and the budding of the HIV virus. Yeast ESCRT-I contains four subunits, Vps23, Vps28, Vps37, and Mvb12. The crystal structure of the heterotetrameric ESCRT-I complex reveals a highly asymmetric complex of 1:1:1:1 subunit stoichiometry. The core complex is nearly 18 nm long and consists of a headpiece attached to a 13 nm stalk. The stalk is important for cargo sorting by ESCRT-I and is proposed to serve as a spacer regulating the correct disposition of cargo and other ESCRT components. Hydrodynamic constraints and crystallographic structures were used to generate a model of intact ESCRT-I in solution. The results show how ESCRT-I uses a combination of a rigid stalk and flexible tethers to interact with lipids, cargo, and other ESCRT complexes over a span of approximately 25 nm.


    Organizational Affiliation

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD 20892, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Suppressor protein STP22 of temperature-sensitive alpha-factor receptor and arginine permeaseA174Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: VPS23
Find proteins for P25604 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P25604 
Go to UniProtKB:  P25604
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Vacuolar protein sorting-associated protein 28B118Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: VPT28
Find proteins for Q02767 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q02767 
Go to UniProtKB:  Q02767
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Protein SRN2C192Saccharomyces cerevisiaeMutation(s): 1 
Gene Names: VPS37
Find proteins for Q99176 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q99176 
Go to UniProtKB:  Q99176
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Hypothetical 12.0 kDa protein in ADE3-SER2 intergenic regionD79Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MVB12
Find proteins for P42939 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P42939 
Go to UniProtKB:  P42939
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.233 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.054α = 90
b = 83.766β = 90
c = 269.146γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-06-05
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2015-06-24
    Changes: Data collection
  • Version 1.4: 2017-11-29
    Changes: Database references
  • Version 1.5: 2018-01-24
    Changes: Structure summary
  • Version 1.6: 2020-04-15
    Changes: Data collection, Database references