7JQQ

The bacteriophage Phi-29 viral genome packaging motor assembly


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A viral genome packaging motor transitions between cyclic and helical symmetry to translocate dsDNA.

Woodson, M.Pajak, J.Mahler, B.P.Zhao, W.Zhang, W.Arya, G.White, M.A.Jardine, P.J.Morais, M.C.

(2021) Sci Adv 7

  • DOI: https://doi.org/10.1126/sciadv.abc1955
  • Primary Citation of Related Structures:  
    7JQQ

  • PubMed Abstract: 

    Molecular segregation and biopolymer manipulation require the action of molecular motors to do work by applying directional forces to macromolecules. The additional strand conserved E (ASCE) ring motors are an ancient family of molecular motors responsible for diverse biological polymer manipulation tasks. Viruses use ASCE segregation motors to package their genomes into their protein capsids and provide accessible experimental systems due to their relative simplicity. We show by cryo-EM-focused image reconstruction that ASCE ATPases in viral double-stranded DNA (dsDNA) packaging motors adopt helical symmetry complementary to their dsDNA substrates. Together with previous data, our results suggest that these motors cycle between helical and planar configurations, providing a possible mechanism for directional translocation of DNA. Similar changes in quaternary structure have been observed for proteasome and helicase motors, suggesting an ancient and common mechanism of force generation that has been adapted for specific tasks over the course of evolution.


  • Organizational Affiliation

    Sealy Center for Structural Biology and Molecular Biophysics, University of Texas Medical Branch, Galveston, TX 77555, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA packaging protein
A, B, C, D, E
332Salasvirus phi29Mutation(s): 0 
Gene Names: 16
EC: 3.6.4
UniProt
Find proteins for P11014 (Bacillus phage phi29)
Explore P11014 
Go to UniProtKB:  P11014
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11014
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains LengthOrganismImage
pRNA (117-MER)F [auth K],
G [auth L],
H [auth M],
I [auth N],
J [auth O]
117Salasvirus phi29
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (60-MER)K [auth F]60Salasvirus phi29
Sequence Annotations
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  • Reference Sequence
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Entity ID: 4
MoleculeChains LengthOrganismImage
DNA (60-MER)L [auth G]60Salasvirus phi29
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION2.10

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM122979
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM127365

Revision History  (Full details and data files)

  • Version 1.0: 2021-05-19
    Type: Initial release
  • Version 1.1: 2024-03-06
    Changes: Data collection, Database references
  • Version 1.2: 2024-05-01
    Changes: Data processing