4Q6H | pdb_00004q6h

CFTR Associated Ligand (CAL) bound to last 6 residues of CFTR (decameric peptide: iCAL36VQDTRL)

• PDB DOI: https://doi.org/10.2210/pdb4Q6H/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2014-04-22 Released: 2014-05-14 
• Deposition Author(s): Amacher, J.F., Madden, D.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 
  0.222 (Depositor), 0.210 (DCC) 
• R-Value Work: 
  0.198 (Depositor), 0.200 (DCC) 
• R-Value Observed: 
  0.200 (Depositor) 

Starting Model: experimental

Literature

Understanding PDZ Affinity and Selectivity: All Residues Considered

Amacher, J.F.

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: 10.17 kDa 
• Atom Count: 782 
• Modeled Residue Count: 93 
• Deposited Residue Count: 93 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CFTR-associated ligand	A	87	Homo sapiens	Mutation(s): 0  Gene Names: GOPC, CAL, FIG
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HD26 (Homo sapiens) Explore Q9HD26  Go to UniProtKB:  Q9HD26
PHAROS:  Q9HD26 GTEx:  ENSG00000047932

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
iCAL36-VQDTRL peptide	B	6	N/A	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO3	C [auth A]	SULFITE ION O3 S LSNNMFCWUKXFEE-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free:  0.222 (Depositor), 0.210 (DCC) 
• R-Value Work:  0.198 (Depositor), 0.200 (DCC) 
• R-Value Observed: 0.200 (Depositor) 

Space Group: P 6₃ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 61.394	α = 90
b = 61.394	β = 90
c = 97.786	γ = 120

Software Package:

Software Name	Purpose
Blu-Ice	data collection
PHENIX	model building
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-05-14 
Deposition Author(s): Amacher, J.F., Madden, D.R.

Revision History  

• Version 1.0: 2014-05-14
  Type: Initial release
  
• Version 1.1: 2017-11-22
  Changes: Refinement description
• Version 1.2: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description