1BKR

CALPONIN HOMOLOGY (CH) DOMAIN FROM HUMAN BETA-SPECTRIN AT 1.1 ANGSTROM RESOLUTION

• PDB DOI:  https://doi.org/10.2210/pdb1BKR/pdb

• Classification: ACTIN-BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 1998-07-10 Released: 1998-07-15 
• Deposition Author(s): Djinovic Carugo, K., Banuelos, S., Saraste, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.10 Å
• R-Value Free: 0.187 
• R-Value Observed: 0.141 

Literature

Structural comparisons of calponin homology domains: implications for actin binding.

Banuelos, S., Saraste, M., Carugo, K.D.

(1998) Structure 6: 1419-1431

• PubMed: 9817844 
• DOI: https://doi.org/10.1016/s0969-2126(98)00141-5
• Primary Citation of Related Structures:  
  1BKR


• PubMed Abstract: 
  

The actin-binding site of several cytoskeletal proteins is comprised of two calponin homology (CH) domains in a tandem arrangement. As a single copy, the CH domain is also found in regulatory proteins in muscle and in signal-transduction proteins. The three-dimensional structures of three CH domains are known, but they have not yet clarified the molecular details of the interaction between actin filaments and proteins harbouring CH domains.

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Related Citations: 

• Crystal Structure of a Calponin Homology Domain
  Carugo, K.D., Banuelos, S., Saraste, M.
  (1997) Nat Struct Biol 4: 175

• The Structure of an Actin-Crosslinking Domain from Human Fimbrin
  Goldsmith, S.C., Pokala, N., Shen, W., Fedorov, A.A., Matsudaira, P., Almo, S.C.
  (1997) Nat Struct Biol 4: 708

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Organizational Affiliation: 

European Molecular Biology Laboratory Postfach 10.2209 D-69012 Heidelberg, Germany.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12.72 kDa 
• Atom Count: 1,095 
• Modelled Residue Count: 108 
• Deposited Residue Count: 109 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SPECTRIN BETA CHAIN	A	109	Homo sapiens	Mutation(s): 0  Gene Names: SPTBN1, SPTB2
UniProt & NIH Common Fund Data Resources
Find proteins for Q01082 (Homo sapiens) Explore Q01082  Go to UniProtKB:  Q01082
PHAROS:  Q01082

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.10 Å
• R-Value Free: 0.187 
• R-Value Observed: 0.141 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 31.65	α = 90
b = 53.953	β = 105.48
c = 32.354	γ = 90

Software Package:

Software Name	Purpose
SHELX	model building
SHELX	refinement
DENZO	data reduction
SCALEPACK	data scaling
SHELX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-07-15 
Deposition Author(s): Djinovic Carugo, K., Banuelos, S., Saraste, M.

Revision History  

• Version 1.0: 1998-07-15
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance