2ARH

Crystal Structure of a Protein of Unknown Function AQ1966 from Aquifex aeolicus VF5

• PDB DOI: https://doi.org/10.2210/pdb2ARH/pdb

• Classification: STRUCTURAL GENOMICS, UNKNOWN FUNCTION
• Organism(s): Aquifex aeolicus
• Expression System: Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 2005-08-19 Released: 2005-10-04 
• Deposition Author(s): Qiu, Y., Kim, Y., Yang, X., Collart, F., Joachimiak, A., Kossiakoff, A., Midwest Center for Structural Genomics (MCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.46 Å
• R-Value Free: 
  0.290 (Depositor), 0.300 (DCC) 
• R-Value Work: 
  0.226 (Depositor), 0.230 (DCC) 
• R-Value Observed: 
  0.229 (Depositor) 

Literature

Crystal Structure of a Hypothetical Protein Aq_1966 from Aquifex aeolicus VF5

Qiu, Y., Kim, Y., Yang, X., Collart, F., Joachimiak, A., Kossiakoff, A.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

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

Macromolecule Content

• Total Structure Weight: 72.57 kDa 
• Atom Count: 5,126 
• Modelled Residue Count: 584 
• Deposited Residue Count: 609 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
hypothetical protein aq_1966	A, B, C	203	Aquifex aeolicus	Mutation(s): 3  Gene Names: aq_1966
UniProt
Find proteins for O67778 (Aquifex aeolicus (strain VF5)) Explore O67778  Go to UniProtKB:  O67778

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	D [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
SE	F [auth C], G [auth C]	SELENIUM ATOM Se SPVXKVOXSXTJOY-UHFFFAOYSA-N
CA	E [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B, C	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.46 Å
• R-Value Free:  0.290 (Depositor), 0.300 (DCC) 
• R-Value Work:  0.226 (Depositor), 0.230 (DCC) 
• R-Value Observed: 0.229 (Depositor) 

Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 121.611	α = 90
b = 121.611	β = 90
c = 102.071	γ = 120

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-10-04 
Deposition Author(s): Qiu, Y., Kim, Y., Yang, X., Collart, F., Joachimiak, A., Kossiakoff, A., Midwest Center for Structural Genomics (MCSG)

Revision History  

• Version 1.0: 2005-10-04
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Refinement description, Version format compliance
• Version 1.3: 2021-10-20
  Changes: Database references, Derived calculations
• Version 1.4: 2024-10-09
  Changes: Data collection, Structure summary