1CM1

MOTIONS OF CALMODULIN-SINGLE-CONFORMER REFINEMENT

• PDB DOI: https://doi.org/10.2210/pdb1CM1/pdb

• Classification: COMPLEX (CALCIUM-BINDING/TRANSFERASE)
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1997-09-23 Released: 1998-03-04 
• Deposition Author(s): Wall, M.E., Phillips Jr., G.N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.302 
• R-Value Work: 0.234 
• R-Value Observed: 0.234 

Literature

Motions of calmodulin characterized using both Bragg and diffuse X-ray scattering.

Wall, M.E., Clarage, J.B., Phillips Jr., G.N.

(1997) Structure 5: 1599-1612

• PubMed: 9438860 
• DOI: https://doi.org/10.1016/s0969-2126(97)00308-0
• Primary Citation of Related Structures:  
  1CM1, 1CM4


• PubMed Abstract: 
  

  Calmodulin is a calcium-activated regulatory protein which can bind to many different targets. The protein resembles a highly flexible dumbbell, and bends in the middle as it binds. This and other motions must be understood to formulate a realistic model of calmodulin function.

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Organizational Affiliation: 

Department of Biochemistry and Cell Biology, The WM Keck Center for Computational Biology, Rice University Houston, TX 77005-1892, USA, [e-mail]

Biological Assembly 1  

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

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

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 19.81 kDa 
• Atom Count: 1,321 
• Modelled Residue Count: 161 
• Deposited Residue Count: 173 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CALMODULIN	A	148	Bos taurus	Mutation(s): 0
UniProt
Find proteins for P62157 (Bos taurus) Explore P62157  Go to UniProtKB:  P62157

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
CALMODULIN-DEPENDENT PROTEIN KINASE II-ALPHA	B	25	Bos taurus	Mutation(s): 0  EC: 2.7.1.123
UniProt
Find proteins for P11275 (Rattus norvegicus) Explore P11275  Go to UniProtKB:  P11275

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	C [auth A], D [auth A], E [auth A], F [auth A], G [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.302 
• R-Value Work: 0.234 
• R-Value Observed: 0.234 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.751	α = 90
b = 75.209	β = 90
c = 120.073	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-03-04 
Deposition Author(s): Wall, M.E., Phillips Jr., G.N.

Revision History  

• Version 1.0: 1998-03-04
  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: 2023-08-09
  Changes: Database references, Derived calculations, Other, Refinement description