2AAN

Auracyanin A: A "blue" copper protein from the green thermophilic photosynthetic bacterium,chloroflexus aurantiacus

• PDB DOI: https://doi.org/10.2210/pdb2AAN/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Chloroflexus aurantiacus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2005-07-13 Released: 2006-07-11 
• Deposition Author(s): Lee, M., Guss, J.M., Freeman, H.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.207 
• R-Value Work: 0.162 
• R-Value Observed: 0.164 

Starting Model: other

Literature

The Crystal Structure of Auracyanin A at 1.85 A Resolution: Why the Photosynthetic Bacterium Chloroflexus Needs Two Almost Identical 'Blue' Copper Proteins

Lee, M., Guss, J.M., Freeman, H.C.

To be published.

Biological Assembly 1  

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

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

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 14.17 kDa 
• Atom Count: 1,004 
• Modelled Residue Count: 123 
• Deposited Residue Count: 139 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
auracyanin A	A	139	Chloroflexus aurantiacus	Mutation(s): 0
UniProt
Find proteins for Q8RMH6 (Chloroflexus aurantiacus (strain ATCC 29366 / DSM 635 / J-10-fl)) Explore Q8RMH6  Go to UniProtKB:  Q8RMH6

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CU	B [auth A]	COPPER (II) ION Cu JPVYNHNXODAKFH-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 0.207 
• R-Value Work: 0.162 
• R-Value Observed: 0.164 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 70.578	α = 90
b = 70.578	β = 90
c = 45.665	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-07-11 
Deposition Author(s): Lee, M., Guss, J.M., Freeman, H.C.

Revision History  

• Version 1.0: 2006-07-11
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Derived calculations, Version format compliance
• Version 1.3: 2018-05-23
  Changes: Data collection
• Version 1.4: 2019-10-23
  Changes: Data collection
• Version 1.5: 2024-03-13
  Changes: Data collection, Database references, Derived calculations
• Version 1.6: 2024-04-03
  Changes: Refinement description