1FOU

CONNECTOR PROTEIN FROM BACTERIOPHAGE PHI29

• PDB DOI: https://doi.org/10.2210/pdb1FOU/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Salasvirus phi29
• Expression System: Bacillus subtilis
• Mutation(s): No 


• Deposited: 2000-08-28 Released: 2000-12-22 
• Deposition Author(s): Simpson, A.A., Tao, Y., Leiman, P.G., Badasso, M.O., He, Y., Jardine, P.J., Olson, N.H., Morais, M.C., Grimes, S.N., Anderson, D.L., Baker, T.S., Rossmann, M.G.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.360 
• R-Value Work: 0.290 
• R-Value Observed: 0.270 

Literature

Structure of the bacteriophage phi29 DNA packaging motor.

Simpson, A.A., Tao, Y., Leiman, P.G., Badasso, M.O., He, Y., Jardine, P.J., Olson, N.H., Morais, M.C., Grimes, S., Anderson, D.L., Baker, T.S., Rossmann, M.G.

(2000) Nature 408: 745-750

• PubMed: 11130079 
• DOI: https://doi.org/10.1038/35047129
• Primary Citation of Related Structures:  
  1FOQ, 1FOU


• PubMed Abstract: 
  

  Motors generating mechanical force, powered by the hydrolysis of ATP, translocate double-stranded DNA into preformed capsids (proheads) of bacterial viruses and certain animal viruses. Here we describe the motor that packages the double-stranded DNA of the Bacillus subtilis bacteriophage phi29 into a precursor capsid. We determined the structure of the head-tail connector--the central component of the phi29 DNA packaging motor--to 3.2 A resolution by means of X-ray crystallography. We then fitted the connector into the electron densities of the prohead and of the partially packaged prohead as determined using cryo-electron microscopy and image reconstruction analysis. Our results suggest that the prohead plus dodecameric connector, prohead RNA, viral ATPase and DNA comprise a rotary motor with the head-prohead RNA-ATPase complex acting as a stator, the DNA acting as a spindle, and the connector as a ball-race. The helical nature of the DNA converts the rotary action of the connector into translation of the DNA.

---

Organizational Affiliation: 

Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-1392, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C12  (Explore in 3D)
Global Stoichiometry: Homo 12-mer - A12 

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

Macromolecule Content

• Total Structure Weight: 431.55 kDa 
• Atom Count: 25,272 
• Modelled Residue Count: 3,084 
• Deposited Residue Count: 3,708 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
UPPER COLLAR PROTEIN	A, B, C, D, E, F, G, H, I, J, K, L	309	Salasvirus phi29	Mutation(s): 0
UniProt
Find proteins for P04332 (Bacillus phage phi29) Explore P04332  Go to UniProtKB:  P04332

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.360 
• R-Value Work: 0.290 
• R-Value Observed: 0.270 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 177.16	α = 90
b = 169.24	β = 114.1
c = 185.44	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
DM	model building
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
DM	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-12-22 
Deposition Author(s): Simpson, A.A., Tao, Y., Leiman, P.G., Badasso, M.O., He, Y., Jardine, P.J., Olson, N.H., Morais, M.C., Grimes, S.N., Anderson, D.L., Baker, T.S., Rossmann, M.G.

Revision History  

• Version 1.0: 2000-12-22
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references