9LCK | pdb_00009lck

Cryo-EM structure of influenza polymerase bound to cRNA promoter

• PDB DOI: https://doi.org/10.2210/pdb9LCK/pdb
• EM Map EMD-66772: EMDB EMDataResource
• NAKB: 9LCK

• Classification: VIRAL PROTEIN/RNA
• Organism(s): Influenza A virus (A/goose/Guangdong/1/1996(H5N1))
• Expression System: Insect cell expression vector pTIE1
• Mutation(s): No 


• Deposited: 2025-01-04 Released: 2026-01-21 
• Deposition Author(s): Wu, Y.X., Liang, H.H.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.98 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM map of influenza polymerase bound to cRNA promoter

Wu, Y.X.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 182.78 kDa 
• Atom Count: 9,930 
• Modeled Residue Count: 1,197 
• Deposited Residue Count: 1,543 
• Unique protein chains: 3
• Unique nucleic acid chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Polymerase acidic protein	A	716	Influenza A virus (A/goose/Guangdong/1/1996(H5N1))	Mutation(s): 0  Gene Names: PA EC: 3.1
UniProt
Find proteins for Q9Q0U9 (Influenza A virus (strain A/Goose/Guangdong/1/1996 H5N1 genotype Gs/Gd)) Explore Q9Q0U9  Go to UniProtKB:  Q9Q0U9

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
RNA-directed RNA polymerase catalytic subunit	B	757	Influenza A virus (A/goose/Guangdong/1/1996(H5N1))	Mutation(s): 0  Gene Names: PB1 EC: 2.7.7.48
UniProt
Find proteins for Q9Q0V0 (Influenza A virus (strain A/Goose/Guangdong/1/1996 H5N1 genotype Gs/Gd)) Explore Q9Q0V0  Go to UniProtKB:  Q9Q0V0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
PB2-S1	C	43	Influenza A virus (A/goose/Guangdong/1/1996(H5N1))	Mutation(s): 0  Gene Names: PB2
UniProt
Find proteins for P0DOG5 (Influenza A virus (strain A/Goose/Guangdong/1/1996 H5N1 genotype Gs/Gd)) Explore P0DOG5  Go to UniProtKB:  P0DOG5

Entity ID: 4
Molecule	Chains	Length	Organism	Image
3'-cRNA	D	9	Influenza A virus (A/goose/Guangdong/1/1996(H5N1))

Entity ID: 5
Molecule	Chains	Length	Organism	Image
5'-cRNA	E	18	Influenza A virus (A/goose/Guangdong/1/1996(H5N1))

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.98 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1_4487

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-01-21 
Deposition Author(s): Wu, Y.X., Liang, H.H.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	--

Revision History  

• Version 1.0: 2026-01-21
  Type: Initial release