8ZWC | pdb_00008zwc

Cryo-EM Structure of the BLOC-3 complex

• PDB DOI: https://doi.org/10.2210/pdb8ZWC/pdb
• EM Map EMD-60523: EMDB EMDataResource

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2024-06-12 Released: 2025-12-17 
• Deposition Author(s): Jia, G.W., Yong, X., Su, Z.M., Jia, D.
• Funding Organization(s): National Natural Science Foundation of China (NSFC), Ministry of Science and Technology (MoST, China)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.19 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM Structure of BLOC-3 complex

Jia, G.W., Yong, X., Su, Z.M., Jia, D.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 132.22 kDa 
• Atom Count: 7,608 
• Modeled Residue Count: 949 
• Deposited Residue Count: 1,180 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BLOC-3 complex member HPS1	A	700	Homo sapiens	Mutation(s): 0  Gene Names: HPS1, HPS
UniProt & NIH Common Fund Data Resources
Find proteins for Q92902 (Homo sapiens) Explore Q92902  Go to UniProtKB:  Q92902
PHAROS:  Q92902 GTEx:  ENSG00000107521

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
BLOC-3 complex member HPS4	B	480	Homo sapiens	Mutation(s): 0  Gene Names: HPS4, KIAA1667
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NQG7 (Homo sapiens) Explore Q9NQG7  Go to UniProtKB:  Q9NQG7
PHAROS:  Q9NQG7 GTEx:  ENSG00000100099

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.19 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-12-17 
Deposition Author(s): Jia, G.W., Yong, X., Su, Z.M., Jia, D.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32222040
National Natural Science Foundation of China (NSFC)	China	32070049
Ministry of Science and Technology (MoST, China)	China	2022YFC2303700
Ministry of Science and Technology (MoST, China)	China	2021YFA1301900

Revision History  

• Version 1.0: 2025-12-17
  Type: Initial release