9WBJ | pdb_00009wbj

cryo-EM structure of RIBEYE SAM thick filament

• PDB DOI: https://doi.org/10.2210/pdb9WBJ/pdb
• EM Map EMD-65841: EMDB EMDataResource

• Classification: PROTEIN BINDING
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2025-08-14 Released: 2026-06-03 
• Deposition Author(s): Liu, Y., Niu, F., Wei, Z.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.37 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Starting Model: in silico

Literature

Coordinated phase separation and phase transition underlie synaptic ribbon

Liu, Y., Wang, X., Zheng, T., Niu, F., Sun, R., Yang, C., Xu, S., Zhao, Z., Shen, Z., Huang, W., Wang, X., Liu, K., Cai, S., Zhang, M., Wei, Z.

(2026) Vita 

• DOI: https://doi.org/10.15302/vita.2026.05.0033

Biological Assembly 1  

Global Symmetry: Helical - H  (Explore in 3D)
Global Stoichiometry: Homo 34-mer - A34 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 374.9 kDa 
• Atom Count: 17,816 
• Modeled Residue Count: 2,346 
• Deposited Residue Count: 3,400 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Isoform 2 of C-terminal-binding protein 2	A, AA [auth a], B, BA [auth b], C, CA [auth c], D, DA [auth d], E, EA [auth e], F, FA [auth f], G, GA [auth g], H, HA [auth h], I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z	100	Mus musculus	Mutation(s): 0  Gene Names: Ctbp2
UniProt & NIH Common Fund Data Resources
Find proteins for P56546 (Mus musculus) Go to UniProtKB:  P56546
IMPC:  MGI:1201686

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.37 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	v3.3.1
MODEL REFINEMENT	PHENIX	1.18.2_3874

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-06-03 
Deposition Author(s): Liu, Y., Niu, F., Wei, Z.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	82188101
National Natural Science Foundation of China (NSFC)	China	32471250
National Natural Science Foundation of China (NSFC)	China	32400784
National Natural Science Foundation of China (NSFC)	China	32471262

Revision History  

• Version 1.0: 2026-06-03
  Type: Initial release