Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D4  (3D View)
Global Stoichiometry: Homo 8-mer - A8 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 162.86 kDa 
• Atom Count: 11378 
• Residue Count: 1442 
• Unique protein chains: 1

2FGH

ATP bound gelsolin

• DOI: 10.2210/pdb2FGH/pdb

• Classification: CONTRACTILE PROTEIN, STRUCTURAL PROTEIN
• Organism(s): Equus caballus
• Mutation(s): No 


• Deposited: 2005-12-22 Released: 2006-04-18 
• Deposition Author(s): Ma, Q., Robinson, R.C., Burtnick, L.D., Urosev, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.265 
• R-Value Work: 0.242 
• R-Value Observed: 0.243 

Literature

The structure of gelsolin bound to ATP

Urosev, D., Ma, Q., Tan, A.L.C., Robinson, R.C., Burtnick, L.D.

(2006) J Mol Biol 357: 765-772

• PubMed: 16469333 
• DOI: 10.1016/j.jmb.2006.01.027
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Calcium activation of the actin-modifying properties of gelsolin is sensitive to ATP. Here, we show that soaking calcium-free gelsolin crystals in ATP-containing media results in ATP occupying a site that spans the two pseudosymmetrical halves of the protein. ATP binding involves numerous polar and hydrophobic contacts and is identical for the two copies of gelsolin related by non-crystallographic symmetry within the crystal. The gamma-phosphate of ATP participates in several charge-charge interactions consistent with the preference of gelsolin for ATP, as a binding partner, over ADP. In addition, disruption of the ATP-binding site through Ca2+ activation of gelsolin reveals why ATP binds more tightly to the inactive molecule, and suggests how the binding of ATP may modulate the sensitivity of gelsolin to calcium ions. Similarities between the ATP and PIP2 interactions with the C-terminal half of gelsolin are evident from their overlapping binding sites and in that both molecules bind more tightly in the absence of calcium ions. We propose a model for how PIP2 may bind to calcium-free gelsolin based on the ATP-binding site.

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Organizational Affiliation: 

Department of Chemistry and Centre for Blood Research, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
gelsolin	A, B	731	Equus caballus	Mutation(s): 0  Gene Names: GSN
Find proteins for Q28372 (Equus caballus) Explore Q28372  Go to UniProtKB:  Q28372

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ATP	A, B	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
ATP	Kd :  280   nM  PDBBind

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.265 
• R-Value Work: 0.242 
• R-Value Observed: 0.243 
• Space Group: P 4 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 167.344	α = 90
b = 167.344	β = 90
c = 149.883	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing
REFMAC	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-12-22 
• Released Date: 2006-04-18 
Deposition Author(s): Ma, Q., Robinson, R.C., Burtnick, L.D., Urosev, D.

Revision History 

• Version 1.0: 2006-04-18
  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: 2017-12-20
  Changes: Data collection, Database references