2BTF | pdb_00002btf

THE STRUCTURE OF CRYSTALLINE PROFILIN-BETA-ACTIN

• PDB DOI: https://doi.org/10.2210/pdb2BTF/pdb

• Classification: ACETYLATION AND ACTIN-BINDING
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1994-01-18 Released: 1994-06-22 
• Deposition Author(s): Schutt, C.E., Myslik, J.C., Rozycki, M.D., Goonesekere, N.C.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Work: 
  0.199 (Depositor) 
• R-Value Observed: 
  0.199 (Depositor) 

Literature

The structure of crystalline profilin-beta-actin.

Schutt, C.E., Myslik, J.C., Rozycki, M.D., Goonesekere, N.C., Lindberg, U.

(1993) Nature 365: 810-816

• PubMed: 8413665 
• DOI: https://doi.org/10.1038/365810a0
• Primary Citation Related Structures: 
  2BTF


• PubMed Abstract: 
  

  The three-dimensional structure of bovine profilin-beta-actin has been solved to 2.55 A resolution by X-ray crystallography. There are several significant local changes in the structure of beta-actin compared with alpha-actin as well as an overall 5 degrees rotation between its two major domains. Actin molecules in the crystal are organized into ribbons through intermolecular contacts like those found in oligomeric protein assemblies. Profilin forms two extensive contacts with the actin ribbon, one of which appears to correspond to the solution contact in vitro.

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Organizational Affiliation: 
• Department of Chemistry, Henry H. Hoyt Laboratory, Princeton University, New Jersey 08544.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content 

• Total Structure Weight: 57.25 kDa 
• Atom Count: 4,000 
• Modeled Residue Count: 515 
• Deposited Residue Count: 515 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA-ACTIN	A	375	Bos taurus	Mutation(s): 0  EC: 3.6.4
UniProt
Find proteins for P60712 (Bos taurus) Explore P60712  Go to UniProtKB:  P60712

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PROFILIN	B [auth P]	140	Bos taurus	Mutation(s): 0
UniProt
Find proteins for P02584 (Bos taurus) Explore P02584  Go to UniProtKB:  P02584

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ATP	D [auth A]	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N
SR	C [auth A]	STRONTIUM ION Sr PWYYWQHXAPXYMF-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
HIC	A	L-PEPTIDE LINKING	C7 H11 N3 O2		HIS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.55 Å
• R-Value Work:  0.199 (Depositor) 
• R-Value Observed: 0.199 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.95	α = 90
b = 71.3	β = 90
c = 171.9	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-06-22 
Deposition Author(s): Schutt, C.E., Myslik, J.C., Rozycki, M.D., Goonesekere, N.C.W.

Revision History  

• Version 1.0: 1994-06-22
  Type: Initial release
  
• Version 1.1: 2008-03-03
  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: 2025-03-26
  Changes: Data collection, Database references, Derived calculations, Structure summary