Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 19.71 kDa 
• Atom Count: 1310 
• Residue Count: 166 
• Unique protein chains: 1

4BEX

Structure of human Cofilin1

• DOI: 10.2210/pdb4BEX/pdb

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


• Deposited: 2013-03-12 Released: 2013-08-28 
• Deposition Author(s): Klejnot, M., Gabrielsen, M., Cameron, J., Mleczak, A., Talapatra, S.K., Kozielski, F., Pannifer, A., Olson, M.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.236 
• R-Value Work: 0.206 
• R-Value Observed: 0.208 

Literature

Analysis of the Human Cofilin1 Structure Reveals Conformational Changes Required for Actin-Binding

Klejnot, M., Gabrielsen, M., Cameron, J., Mleczak, A., Talapatra, S.K., Kozielski, F., Pannifer, A., Olson, M.F.

(2013) Acta Crystallogr D Biol Crystallogr 69: 1780

• PubMed: 23999301 
• DOI: 10.1107/S0907444913014418
• Primary Citation of Related Structures:  
  4BEX


• PubMed Abstract: 
  

The actin cytoskeleton is the chassis that gives a cell its shape and structure, and supplies the power for numerous dynamic processes including motility, endocytosis, intracellular transport and division. To perform these activities, the cytoskeleton undergoes constant remodelling and reorganization. One of the major actin-remodelling families are the cofilin proteins, made up of cofilin 1, cofilin 2 and actin-depolymerizing factor (ADF), which sever aged ADP-associated actin filaments to reduce filament length and provide new potential nucleation sites. Despite the significant interest in cofilin as a central node in actin-cytoskeleton dynamics, to date the only forms of cofilin for which crystal structures have been solved are from the yeast, Chromalveolata and plant kingdoms; none have previously been reported for an animal cofilin protein. Two distinct regions in animal cofilin are significantly larger than in the forms previously crystallized, suggesting that they would be uniquely organized. Therefore, it was sought to determine the structure of human cofilin 1 by X-ray crystallography to elucidate how it could interact with and regulate dynamic actin-cytoskeletal structures. Although wild-type human cofilin 1 proved to be recalcitrant, a C147A point mutant yielded crystals that diffracted to 2.8 Å resolution. These studies revealed how the actin-binding helix undergoes a conformational change that increases the number of potential hydrogen bonds available for substrate binding.

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Organizational Affiliation: 

Beatson Institute for Cancer Research, Garscube Estate, Switchback Road, Glasgow G61 1BD, Scotland.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
COFILIN-1	1	181	Homo sapiens	Mutation(s): 1  Gene Names: CFL1, CFL
Find proteins for P23528 (Homo sapiens) Explore P23528  Go to UniProtKB:  P23528
NIH Common Fund Data Resources
PHAROS  P23528 GTEx  ENSG00000172757

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.236 
• R-Value Work: 0.206 
• R-Value Observed: 0.208 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 85.94	α = 90
b = 85.94	β = 90
c = 85.29	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-03-12 
• Released Date: 2013-08-28 
Deposition Author(s): Klejnot, M., Gabrielsen, M., Cameron, J., Mleczak, A., Talapatra, S.K., Kozielski, F., Pannifer, A., Olson, M.F.

Revision History 

• Version 1.0: 2013-08-28
  Type: Initial release
  
• Version 1.1: 2013-09-11
  Changes: Database references, Structure summary
• Version 1.2: 2013-09-18
  Changes: Structure summary