7VON | pdb_00007von

Native alpha-2-macroglobulin monomer

• PDB DOI: https://doi.org/10.2210/pdb7VON/pdb
• EM Map EMD-32051: EMDB EMDataResource

• Classification: BLOOD CLOTTING
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2021-10-14 Released: 2022-11-16 
• Deposition Author(s): Huang, X., Wang, Y.
• Funding Organization(s): National Science Foundation (NSF, China)

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 5.20 Å
• Aggregation State: TISSUE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structures reveal the dynamic transformation of human alpha-2-macroglobulin working as a protease inhibitor.

Huang, X., Wang, Y., Yu, C., Zhang, H., Ru, Q., Li, X., Song, K., Zhou, M., Zhu, P.

(2022) Sci China Life Sci 65: 2491-2504

• PubMed: 35781771 
• DOI: https://doi.org/10.1007/s11427-022-2139-2
• Primary Citation Related Structures: 
  7VON, 7VOO


• PubMed Abstract: 
  

  Human alpha-2-macroglobulin is a well-known inhibitor of a broad spectrum of proteases and plays important roles in immunity, inflammation, and infections. Here, we report the cryo-EM structures of human alpha-2-macroglobulin in its native state, induced state transformed by its authentic substrate, human trypsin, and serial intermediate states between the native and fully induced states. These structures exhibit distinct conformations, which reveal the dynamic transformation of alpha-2-macro-globulin that acts as a protease inhibitor. The results shed light on the molecular mechanism of alpha-2-macroglobulin in entrapping substrates.

---

Organizational Affiliation: 
• National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
The Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC), Beijing, 100193, China.
National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China. [e-mail].
University of Chinese Academy of Sciences, Beijing, 100049, China. [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 160.11 kDa 
• Atom Count: 10,620 
• Modeled Residue Count: 1,399 
• Deposited Residue Count: 1,442 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-2-macroglobulin	A	1,442	Homo sapiens	Mutation(s): 0  Gene Names: A2M, CPAMD5, FWP007
UniProt & NIH Common Fund Data Resources
Find proteins for P01023 (Homo sapiens) Explore P01023  Go to UniProtKB:  P01023
PHAROS:  P01023 GTEx:  ENSG00000175899

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 5.20 Å
• Aggregation State: TISSUE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2022-11-16 
Deposition Author(s): Huang, X., Wang, Y.

---

Funding Organization	Location	Grant Number
National Science Foundation (NSF, China)	China	--

Revision History  

• Version 1.0: 2022-11-16
  Type: Initial release
  
• Version 1.1: 2022-12-07
  Changes: Database references
• Version 1.2: 2024-10-23
  Changes: Data collection, Structure summary