Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 12-mer - A4B4C4 Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 4-mer - B4 

Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 4-mer - B4 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 1170.44 kDa 
• Atom Count: 21116 
• Modelled Residue Count: 2616 
• Deposited Residue Count: 10368 
• Unique protein chains: 2

4UUK

Human dynamin 1 K44A superconstricted polymer stabilized with GTP strand 2

• PDB DOI: 10.2210/pdb4UUK/pdb
• EM Map EMD-2701: EMDB EMDataResource

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3), Escherichia coli
• Mutation(s): Yes 


• Deposited: 2014-07-29 Released: 2014-08-27 
• Deposition Author(s): Sundborger, A.C., Fang, S., Heymann, J.A., Ray, P., Chappie, J.S., Hinshaw, J.E.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 12.5 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

A Dynamin Mutant Defines a Superconstricted Prefission State.

Sundborger, A.C., Fang, S., Heymann, J.A., Ray, P., Chappie, J.S., Hinshaw, J.E.

(2014) Cell Rep 8: 734

• PubMed: 25088425 
• DOI: 10.1016/j.celrep.2014.06.054
• Primary Citation of Related Structures:  
  4UUD, 4UUK


• PubMed Abstract: 
  

Dynamin is a 100 kDa GTPase that organizes into helical assemblies at the base of nascent clathrin-coated vesicles. Formation of these oligomers stimulates the intrinsic GTPase activity of dynamin, which is necessary for efficient membrane fission during endocytosis. Recent evidence suggests that the transition state of dynamin's GTP hydrolysis reaction serves as a key determinant of productive fission. Here, we present the structure of a transition-state-defective dynamin mutant K44A trapped in a prefission state at 12.5 Å resolution. This structure constricts to 3.7 nm, reaching the theoretical limit required for spontaneous membrane fission. Computational docking indicates that the ground-state conformation of the dynamin polymer is sufficient to achieve this superconstricted prefission state and reveals how a two-start helical symmetry promotes the most efficient packing of dynamin tetramers around the membrane neck. These data suggest a model for the assembly and regulation of the minimal dynamin fission machine.

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Organizational Affiliation: 

Laboratory of Cell and Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DYNAMIN-1	A, D, G, K	864	Homo sapiens	Mutation(s): 1  Gene Names: DNM1, DNM EC: 3.6.5.5
UniProt & NIH Common Fund Data Resources
Find proteins for Q05193 (Homo sapiens) Explore Q05193  Go to UniProtKB:  Q05193
PHAROS:  Q05193

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
DYNAMIN-1	B, C, E, F, H, I, J, L	864	Homo sapiens	Mutation(s): 0  Gene Names: DNM1, DNM EC: 3.6.5.5
UniProt & NIH Common Fund Data Resources
Find proteins for Q05193 (Homo sapiens) Explore Q05193  Go to UniProtKB:  Q05193
PHAROS:  Q05193

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 12.5 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2014-07-29 
• Released Date: 2014-08-27 
Deposition Author(s): Sundborger, A.C., Fang, S., Heymann, J.A., Ray, P., Chappie, J.S., Hinshaw, J.E.

Revision History  

• Version 1.0: 2014-08-27
  Type: Initial release
  
• Version 1.1: 2017-08-30
  Changes: Data collection