6URU | pdb_00006uru

iAChSnFR Fluorescent Acetylcholine Sensor precursor

• PDB DOI: https://doi.org/10.2210/pdb6URU/pdb

• Classification: FLUORESCENT PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2019-10-24 Released: 2019-11-20 
• Deposition Author(s): Borden, P.M., Marvin, J.S., Looger, L.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 
  0.265 (Depositor), 0.264 (DCC) 
• R-Value Work: 
  0.213 (Depositor), 0.216 (DCC) 
• R-Value Observed: 
  0.216 (Depositor) 

Starting Models: experimental

Literature

iAChSnFR Fluorescent Acetylcholine Sensor precursor

Borden, P.M., Marvin, J.S., Looger, L.L.

To be published.

Biological Assembly 1  

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

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

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 125.79 kDa 
• Atom Count: 7,974 
• Modeled Residue Count: 1,002 
• Deposited Residue Count: 1,116 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
iAChSnFR precursor	A, B	558	Escherichia coli	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
CRO	A, B	L-PEPTIDE LINKING	C15 H17 N3 O5		THR, TYR, GLY

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free:  0.265 (Depositor), 0.264 (DCC) 
• R-Value Work:  0.213 (Depositor), 0.216 (DCC) 
• R-Value Observed: 0.216 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 72.12	α = 90
b = 89.78	β = 90.48
c = 92.89	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
iMOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-11-20 
Deposition Author(s): Borden, P.M., Marvin, J.S., Looger, L.L.

Revision History  

• Version 1.0: 2019-11-20
  Type: Initial release
  
• Version 1.1: 2023-10-11
  Changes: Data collection, Database references, Refinement description
• Version 1.2: 2023-11-15
  Changes: Data collection
• Version 1.3: 2024-10-16
  Changes: Structure summary
• Version 2.0: 2026-03-18
  Changes: Polymer sequence