9HTW | pdb_00009htw

Minor protein P7 dimer from transcribing particles of bacteriophage phi6

• PDB DOI: https://doi.org/10.2210/pdb9HTW/pdb
• EM Map EMD-52385: EMDB EMDataResource

• Classification: VIRUS
• Organism(s): Cystovirus phi6
• Mutation(s): No 


• Deposited: 2024-12-20 Released: 2026-01-14 
• Deposition Author(s): Kumpula, E.-P., Huiskonen, J.T.
• Funding Organization(s): Academy of Finland

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Experimental Data Snapshot

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

Starting Model: in silico

Literature

Restructuring of bacteriophage phi6 viral particle activates semi-conservative transcription

Ilca, S.L., Sun, X., Kumpula, E.-P., Eskelin, K., Poranen, M.M., Huiskonen, J.T.

To be published.

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 (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 24.04 kDa 
• Atom Count: 1,690 
• Modeled Residue Count: 222 
• Deposited Residue Count: 222 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nucleocapsid protein	A [auth G], B [auth H]	111	Cystovirus phi6	Mutation(s): 0
UniProt
Find proteins for Q283U0 (Cystovirus phi6) Explore Q283U0  Go to UniProtKB:  Q283U0

Experimental Data & Validation

Experimental Data

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

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.2_5419

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2026-01-14 
Deposition Author(s): Kumpula, E.-P., Huiskonen, J.T.

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Funding Organization	Location	Grant Number
Academy of Finland	Finland	331627

Revision History  

• Version 1.0: 2026-01-14
  Type: Initial release