23SG | pdb_000023sg

The composite Cryo-EM structure of bacteriophage RAN69 pre-ejectosome-portal complex

• PDB DOI: https://doi.org/10.2210/pdb23SG/pdb
• EM Map EMD-69208: EMDB EMDataResource

• Classification: VIRUS
• Organism(s): Klebsiella phage RAN69
• Mutation(s): No 


• Deposited: 2026-02-15 Released: 2026-05-27 
• Deposition Author(s): Ruan, Z., Hu, H., Wang, A., Shao, Q., Li, X., Xie, L., Sun, Z., Yu, J., Fang, Q.
• Funding Organization(s): Other government, National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Near-complete cryo-EM structure of the Klebsiella pneumoniae podophage RAN69 reveals tail fiber-spike interface and a divergent pre-ejectosome

Ruan, Z., Hu, H., Wang, A., Shao, Q., Li, X., Xie, L., Sun, Z., Yu, J., Fang, Q.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C4  (Explore in 3D)
Global Stoichiometry: Hetero 40-mer - A12B8C8D8E4 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 562.96 kDa 
• Atom Count: 35,335 
• Modeled Residue Count: 4,591 
• Deposited Residue Count: 5,182 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
gp11	A [auth N], E [auth G]	893	Klebsiella phage RAN69	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
gp12	B [auth X], C [auth a]	195	Klebsiella phage RAN69	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
gp10	D [auth S]	1,239	Klebsiella phage RAN69	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
portal gp19	F [auth d], G [auth A], H [auth D]	531	Klebsiella phage RAN69	Mutation(s): 0

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
gp20	I [auth m], J [auth g]	87	Klebsiella phage RAN69	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	RELION

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-05-27 
Deposition Author(s): Ruan, Z., Hu, H., Wang, A., Shao, Q., Li, X., Xie, L., Sun, Z., Yu, J., Fang, Q.

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Funding Organization	Location	Grant Number
Other government	China	JCYJ20250604174416022
Other government	China	A2402025
National Natural Science Foundation of China (NSFC)	China	32371285

Revision History  

• Version 1.0: 2026-05-27
  Type: Initial release