9VZ0 | pdb_00009vz0

Cryo-EM structure of the head of contracted P1

• PDB DOI: https://doi.org/10.2210/pdb9VZ0/pdb
• EM Map EMD-65475: EMDB EMDataResource

• Classification: VIRAL PROTEIN
• Organism(s): Escherichia phage P1
• Mutation(s): No 


• Deposited: 2025-07-21 Released: 2025-10-22 
• Deposition Author(s): Chen, Y., Liu, H.R.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

The in stiu structure of the head of contracted P1

Chen, Y., Liu, H.R.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 91.74 kDa 
• Atom Count: 2,203 
• Modeled Residue Count: 287 
• Deposited Residue Count: 842 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Hdf	A [auth H]	203	Escherichia phage P1	Mutation(s): 0
UniProt
Find proteins for Q71TE2 (Escherichia phage P1) Explore Q71TE2  Go to UniProtKB:  Q71TE2

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Defense against restriction protein A	B [auth I]	639	Escherichia phage P1	Mutation(s): 0
UniProt
Find proteins for O21970 (Escherichia phage P1) Explore O21970  Go to UniProtKB:  O21970

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1_4487
RECONSTRUCTION	EMAN

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-10-22 
Deposition Author(s): Chen, Y., Liu, H.R.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	12034006
National Natural Science Foundation of China (NSFC)	China	32430020
National Natural Science Foundation of China (NSFC)	China	32071209

Revision History  

• Version 1.0: 2025-10-22
  Type: Initial release