4BWW

Crystal structure of spin labelled azurin T21R1.

• PDB DOI: https://doi.org/10.2210/pdb4BWW/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Pseudomonas aeruginosa PAO1
• Expression System: Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 2013-07-04 Released: 2014-06-11 
• Deposition Author(s): Hagelueken, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.48 Å
• R-Value Free: 0.210 
• R-Value Work: 0.179 
• R-Value Observed: 0.180 

Literature

High-Resolution Crystal Structure of Spin Labelled (T21R1) Azurin from Pseudomonas Aeruginosa: A Challenging Structural Benchmark for in Silico Spin Labelling Algorithms.

Florin, N., Schiemann, O., Hagelueken, G.

(2014) BMC Struct Biol 14: 16

• PubMed: 24884565 
• DOI: https://doi.org/10.1186/1472-6807-14-16
• Primary Citation of Related Structures:  
  4BWW


• PubMed Abstract: 
  

  EPR-based distance measurements between spin labels in proteins have become a valuable tool in structural biology. The direct translation of the experimental distances into structural information is however often impaired by the intrinsic flexibility of the spin labelled side chains. Different algorithms exist that predict the approximate conformation of the spin label either by using pre-computed rotamer libraries of the labelled side chain (rotamer approach) or by simply determining its accessible volume (accessible volume approach). Surprisingly, comparisons with many experimental distances have shown that both approaches deliver the same distance prediction accuracy of about 3 Å.

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Organizational Affiliation: 

Institute for Physical and Theoretical Chemistry, University of Bonn, Wegelerstr, 12, Bonn, NRW 53115, Germany. [e-mail].

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 59.41 kDa 
• Atom Count: 4,605 
• Modelled Residue Count: 512 
• Deposited Residue Count: 524 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
AZURIN	A, B, C, D	131	Pseudomonas aeruginosa PAO1	Mutation(s): 1
UniProt
Find proteins for P00282 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore P00282  Go to UniProtKB:  P00282

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	L [auth B], M [auth B], T [auth C], Y [auth D], Z [auth D]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	F [auth A], J [auth B], K [auth B], N [auth B], P [auth B], R [auth C], S [auth C], W [auth D]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
CU	E [auth A], H [auth B], Q [auth C], V [auth D]	COPPER (II) ION Cu JPVYNHNXODAKFH-UHFFFAOYSA-N
NO3	G [auth A], I [auth B], O [auth B], U [auth C], X [auth D]	NITRATE ION N O3 NHNBFGGVMKEFGY-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
R1A	A, B, C, D	L-PEPTIDE LINKING	C12 H21 N2 O3 S2		CYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.48 Å
• R-Value Free: 0.210 
• R-Value Work: 0.179 
• R-Value Observed: 0.180 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 36.95	α = 74.4
b = 53.66	β = 89.33
c = 73.21	γ = 83.41

Software Package:

Software Name	Purpose
PHENIX	refinement
iMOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-06-11 
Deposition Author(s): Hagelueken, G.

Revision History  

• Version 1.0: 2014-06-11
  Type: Initial release
  
• Version 1.1: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description