Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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: 19.32 kDa 
• Atom Count: 1236 
• Residue Count: 151 
• Unique protein chains: 2

1CDM

MODULATION OF CALMODULIN PLASTICITY IN MOLECULAR RECOGNITION ON THE BASIS OF X-RAY STRUCTURES

• DOI: 10.2210/pdb1CDM/pdb

• Classification: CALCIUM-BINDING PROTEIN
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1993-10-08 Released: 1994-08-31 
• Deposition Author(s): Meador, W.E., Quiocho, F.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.208 
• R-Value Observed: 0.208 

Literature

Modulation of calmodulin plasticity in molecular recognition on the basis of x-ray structures.

Meador, W.E., Means, A.R., Quiocho, F.A.

(1993) Science 262: 1718-1721

• PubMed: 8259515 
• DOI: 10.1126/science.8259515
• Primary Citation of Related Structures:  
  1CDM


• PubMed Abstract: 
  

Calmodulin is the primary calcium-dependent signal transducer and regulator of a wide variety of essential cellular functions. The structure of calcium-calmodulin bound to the peptide corresponding to the calmodulin-binding domain of brain calmodulin-dependent protein kinase II alpha was determined to 2 angstrom resolution. A comparison to two other calcium-calmodulin structures reveals how the central helix unwinds in order to position the two domains optimally in the recognition of different target enzymes and clarifies the role of calcium in maintaining recognition-competent domain structures.

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Related Citations: 

• Target Enzyme Recognition by Calmodulin: 2.4 Angstroms Structure of a Calmodulin-Peptide Complex
  Meador, W.E., Means, A.R., Quiocho, F.A.
  (1992) Science 257: 1251

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Organizational Affiliation: 

Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PEPTIDE CALMODULIN-DEPENDENT PROTEIN KINASE II	A	144	Bos taurus	Mutation(s): 0  Gene Names: CALM, CAM
Find proteins for P62157 (Bos taurus) Explore P62157  Go to UniProtKB:  P62157

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
CALMODULIN	B	25	N/A	Mutation(s): 0
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	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.208 
• R-Value Observed: 0.208 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39	α = 90
b = 75.2	β = 90
c = 120.15	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-10-08 
• Released Date: 1994-08-31 
Deposition Author(s): Meador, W.E., Quiocho, F.A.

Revision History 

• Version 1.0: 1994-08-31
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance