1ACF

ACANTHAMOEBA CASTELLANII PROFILIN IB

• PDB DOI: https://doi.org/10.2210/pdb1ACF/pdb

• Classification: CONTRACTILE PROTEIN
• Organism(s): Acanthamoeba castellanii
• Mutation(s): No 


• Deposited: 1994-07-29 Released: 1994-08-31 
• Deposition Author(s): Fedorov, A.A., Magnus, K.A., Graupe, M.H., Lattman, E.E., Pollard, T.D., Almo, S.C.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.179 
• R-Value Observed: 0.179 

Literature

X-ray structures of isoforms of the actin-binding protein profilin that differ in their affinity for phosphatidylinositol phosphates.

Fedorov, A.A., Magnus, K.A., Graupe, M.H., Lattman, E.E., Pollard, T.D., Almo, S.C.

(1994) Proc Natl Acad Sci U S A 91: 8636-8640

• PubMed: 8078936 
• DOI: https://doi.org/10.1073/pnas.91.18.8636
• Primary Citation of Related Structures:  
  1ACF, 2ACG


• PubMed Abstract: 
  

  We determined the structures of Acanthamoeba profilin I and profilin II by x-ray crystallography at resolutions of 2.0 and 2.8 A, respectively. The polypeptide folds and the actin-binding surfaces of the amoeba profilins are very similar to those of bovine and human profilins. The electrostatic potential surfaces of the two Acanthamoeba isoforms differ. Two areas of high positive potential on the surface of profilin II are candidate binding sites for phosphatidylinositol phosphates. The proximity of these sites to the actin binding site provides an explanation for the competition between actin and lipids for binding profilin.

---

Organizational Affiliation: 

Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY 10461.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12.85 kDa 
• Atom Count: 972 
• Modelled Residue Count: 125 
• Deposited Residue Count: 125 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROFILIN I	A	125	Acanthamoeba castellanii	Mutation(s): 0
UniProt
Find proteins for Q95VF7 (Acanthamoeba castellanii) Explore Q95VF7  Go to UniProtKB:  Q95VF7

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.179 
• R-Value Observed: 0.179 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 110.031	α = 90
b = 31.631	β = 111.38
c = 33.487	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
PROFFT	refinement
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-08-31 
Deposition Author(s): Fedorov, A.A., Magnus, K.A., Graupe, M.H., Lattman, E.E., Pollard, T.D., Almo, S.C.

Revision History  

• Version 1.0: 1994-08-31
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other
• Version 1.4: 2019-07-17
  Changes: Data collection, Refinement description
• Version 1.5: 2019-08-14
  Changes: Data collection, Refinement description
• Version 1.6: 2024-02-07
  Changes: Data collection, Database references