Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - ABCD Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 4-mer -A2BC 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 92242.82 
• Atom Count: 5592 
• Residue Count: 804 
• Unique protein chains: 3

3CUQ

Integrated structural and functional model of the human ESCRT-II complex

• DOI: 10.2210/pdb3CUQ/pdb

• Classification: PROTEIN TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2008-04-16 Released: 2008-11-04 
• Deposition Author(s): Im, Y.J., Hurley, J.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.61 Å
• R-Value Free: 0.298 
• R-Value Work: 0.238 

Literature

Integrated structural model and membrane targeting mechanism of the human ESCRT-II complex

Im, Y.J., Hurley, J.H.

(2008) Dev.Cell 14: 902-913

• PubMed: 18539118 
• DOI: 10.1016/j.devcel.2008.04.004
• Primary Citation of Related Structures:  
  2ZME


• PubMed Abstract: 
  

ESCRT-II plays a pivotal role in receptor downregulation and multivesicular body biogenesis and is conserved from yeast to humans. The crystal structures of two human ESCRT-II complex structures have been determined at 2.6 and 2.9 A resolution, respectively. The complex has three lobes and contains one copy each of VPS22 and VPS36 and two copies of VPS25. The structure reveals a dynamic helical domain to which both the VPS22 and VPS36 subunits contribute that connects the GLUE domain to the rest of the ESCRT-II core. Hydrodynamic analysis shows that intact ESCRT-II has a compact, closed conformation. ESCRT-II binds to the ESCRT-I VPS28 C-terminal domain subunit through a helix immediately C-terminal to the VPS36-GLUE domain. ESCRT-II is targeted to endosomal membranes by the lipid-binding activities of both the Vps36 GLUE domain and the first helix of Vps22. These data provide a unifying structural and functional framework for the ESCRT-II complex.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Vacuolar-sorting protein SNF8	A	234	Homo sapiens	Mutation(s): 0  Gene Names: SNF8 (EAP30)
Find proteins for Q96H20 (Homo sapiens) Go to Gene View: SNF8 Go to UniProtKB:  Q96H20

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Vacuolar protein-sorting-associated protein 36	B	218	Homo sapiens	Mutation(s): 0  Gene Names: VPS36 (C13orf9, EAP45)
Find proteins for Q86VN1 (Homo sapiens) Go to Gene View: VPS36 Go to UniProtKB:  Q86VN1

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
Vacuolar protein-sorting-associated protein 25	C, D	176	Homo sapiens	Mutation(s): 0  Gene Names: VPS25 (DERP9, EAP20)
Find proteins for Q9BRG1 (Homo sapiens) Go to Gene View: VPS25 Go to UniProtKB:  Q9BRG1

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.61 Å
• R-Value Free: 0.298 
• R-Value Work: 0.238 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 70.162	α = 90.00
b = 89.153	β = 101.52
c = 91.437	γ = 90.00

Software Package:

Software Name	Purpose
HKL-2000	data reduction
HKL-2000	data scaling
HKL-2000	data collection
REFMAC	refinement
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-04-16 
• Released Date: 2008-11-04 
• Deposition Author(s): Im, Y.J., Hurley, J.H.

Revision History 

• Version 1.0: 2008-11-04
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Advisory, Refinement description, Version format compliance