5JQA | pdb_00005jqa

CaM:RM20 complex

• PDB DOI: https://doi.org/10.2210/pdb5JQA/pdb

• Classification: CALCIUM BINDING PROTEIN/PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2016-05-04 Released: 2017-10-11 
• Deposition Author(s): Tokars, V.L., Minasov, G., Anderson, W.F., Watterson, D.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.188 (Depositor), 0.190 (DCC) 
• R-Value Work: 
  0.153 (Depositor), 0.160 (DCC) 
• R-Value Observed: 
  0.155 (Depositor) 

Starting Model: experimental

Literature

CaM:RM20 complex

Tokars, V.L., Minasov, G., Anderson, W.F., Watterson, D.M.

To be published.

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: 19.33 kDa 
• Atom Count: 1,600 
• Modeled Residue Count: 168 
• Deposited Residue Count: 170 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Calmodulin	A	149	Homo sapiens	Mutation(s): 0  Gene Names:  CALM1, CALM, CAM, CAM1, CALM2, CAM2, CAMB, CALM3, CALML2, CAM3, CAMC, CAMIII
UniProt & NIH Common Fund Data Resources
Find proteins for P0DP23 (Homo sapiens) Explore P0DP23  Go to UniProtKB:  P0DP23
PHAROS:  P0DP23 GTEx:  ENSG00000198668

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Myosin light chain kinase, smooth muscle	B	21	Homo sapiens	Mutation(s): 1  EC: 2.7.11.18
UniProt & NIH Common Fund Data Resources
Find proteins for Q15746 (Homo sapiens) Explore Q15746  Go to UniProtKB:  Q15746
PHAROS:  Q15746 GTEx:  ENSG00000065534

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]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.188 (Depositor), 0.190 (DCC) 
• R-Value Work:  0.153 (Depositor), 0.160 (DCC) 
• R-Value Observed: 0.155 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 29.016	α = 90
b = 57.048	β = 98.17
c = 45.068	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2017-10-11 
Deposition Author(s): Tokars, V.L., Minasov, G., Anderson, W.F., Watterson, D.M.

Revision History  

• Version 1.0: 2017-10-11
  Type: Initial release
  
• Version 1.1: 2023-09-27
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.2: 2024-10-30
  Changes: Structure summary