4ART | pdb_00004art

STRUCTURE OF THE ORF273 PROTEIN FROM THE ACIDIANUS TWO-TAILED VIRUS

• PDB DOI: https://doi.org/10.2210/pdb4ART/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Bicaudavirus pozzuoliense
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2012-04-26 Released: 2012-10-24 
• Deposition Author(s): Felisberto-Rodrigues, C., Ortiz-Lombardia, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 
  0.234 (Depositor), 0.218 (DCC) 
• R-Value Work: 
  0.202 (Depositor) 
• R-Value Observed: 
  0.204 (Depositor) 

Literature

Crystal Structure of Atv(Orf273), a New Fold for a Thermo-and Acido-Stable Protein from the Acidianus Two-Tailed Virus.

Felisberto-Rodrigues, C., Blangy, S., Goulet, A., Vestergaard, G., Cambillau, C., Garrett, R.A., Ortiz-Lombardia, M.

(2012) PLoS One 7: 45847

• PubMed: 23056221 
• DOI: https://doi.org/10.1371/journal.pone.0045847
• Primary Citation Related Structures: 
  4ART, 4ATS


• PubMed Abstract: 
  

  Acidianus two-tailed virus (ATV) infects crenarchaea of the genus Acidianus living in terrestrial thermal springs at extremely high temperatures and low pH. ATV is a member of the Bicaudaviridae virus family and undergoes extra-cellular development of two tails, a process that is unique in the viral world. To understand this intriguing phenomenon, we have undertaken structural studies of ATV virion proteins and here we present the crystal structure of one of these proteins, ATV(ORF273). ATV(ORF273) forms tetramers in solution and a molecular envelope is provided for the tetramer, computed from small-angle X-ray scattering (SAXS) data. The crystal structure has properties typical of hyperthermostable proteins, including a relatively high number of salt bridges. However, the protein also exhibits flexible loops and surface pockets. Remarkably, ATV(ORF273) displays a new α + β protein fold, consistent with the absence of homologues of this protein in public sequence databases.

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Organizational Affiliation: 
• CNRS, Aix-Marseille Université, AFMB, UMR 7257, Campus de Luminy, Marseille, France.

Biological Assembly 1  

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

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

Macromolecule Content 

• Total Structure Weight: 66.52 kDa 
• Atom Count: 4,198 
• Modeled Residue Count: 468 
• Deposited Residue Count: 558 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
STRUCTURAL PROTEIN ORF273	A, B	279	Bicaudavirus pozzuoliense	Mutation(s): 0
UniProt
Find proteins for Q3V4T6 (Acidianus two-tailed virus) Explore Q3V4T6  Go to UniProtKB:  Q3V4T6

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	E [auth A], F [auth B], G [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	C [auth A], D [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free:  0.234 (Depositor), 0.218 (DCC) 
• R-Value Work:  0.202 (Depositor) 
• R-Value Observed: 0.204 (Depositor) 

Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 78.62	α = 90
b = 78.62	β = 90
c = 189.42	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
XDS	data reduction
XSCALE	data scaling
autoSHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-10-24 
Deposition Author(s): Felisberto-Rodrigues, C., Ortiz-Lombardia, M.

Revision History  

• Version 1.0: 2012-10-24
  Type: Initial release
  
• Version 1.1: 2024-11-20
  Changes: Data collection, Database references, Derived calculations, Other, Structure summary