9FKO | pdb_00009fko

Arm segment of bacteriophage phi812

• PDB DOI: https://doi.org/10.2210/pdb9FKO/pdb

• Classification: VIRUS
• Organism(s): Staphylococcus phage 812, Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-06-03 Released: 2025-06-18 
• Deposition Author(s): Siborova, M., Baska, R., Binovsky, J., Plevka, P.
• Funding Organization(s): European Research Council (ERC), Other government

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.275 (Depositor), 0.275 (DCC) 
• R-Value Work: 
  0.245 (Depositor), 0.245 (DCC) 
• R-Value Observed: 
  0.247 (Depositor) 

Literature

Cell attachment and tail contraction of S. aureus phage phi812

Binovsky, J., Siborova, M., Plevka, P.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 7-mer - A6B1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A4B1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 4-mer - A4 

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

Biological assembly 2 assigned by authors.

Biological Assembly 3  

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

Biological assembly 3 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 116.66 kDa 
• Atom Count: 8,239 
• Modeled Residue Count: 1,051 
• Deposited Residue Count: 1,051 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Baseplate protein	A, B, C, D, E, F	174	Staphylococcus phage 812	Mutation(s): 0  Gene Names: 812_119, 812_121, 812a_121, 812F1_121, K1/420_121, K1_121
UniProt
Find proteins for Q4Z9Z7 (Staphylococcus phage G1) Explore Q4Z9Z7  Go to UniProtKB:  Q4Z9Z7

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Unknown peptide	G	7	Escherichia coli	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.275 (Depositor), 0.275 (DCC) 
• R-Value Work:  0.245 (Depositor), 0.245 (DCC) 
• R-Value Observed: 0.247 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 92.93	α = 90
b = 75.14	β = 109.87
c = 94.45	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PHENIX	refinement
XDS	data reduction
XDS	data scaling
SHELXD	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-06-18 
Deposition Author(s): Siborova, M., Baska, R., Binovsky, J., Plevka, P.

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Funding Organization	Location	Grant Number
European Research Council (ERC)	European Union	101043452
Other government	Czech Republic	LX22NP05103

Revision History  

• Version 1.0: 2025-06-18
  Type: Initial release