9JO9 | pdb_00009jo9

CRP-HCAb3 complex

• PDB DOI: https://doi.org/10.2210/pdb9JO9/pdb
• EM Map EMD-61648: EMDB EMDataResource

• Classification: IMMUNE SYSTEM
• Organism(s): Vicugna pacos, Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2024-09-24 Released: 2025-10-22 
• Deposition Author(s): Li, Y.J.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.65 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

CRP-HCAb3 complex

Li, Y.J.

To be published.

Biological Assembly 1  

Global Symmetry: Dihedral - D5  (Explore in 3D)
Global Stoichiometry: Hetero 20-mer - A10B10 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 372.96 kDa 
• Atom Count: 26,120 
• Modeled Residue Count: 3,310 
• Deposited Residue Count: 3,340 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CRP specific recognition heavy chain antibodie 3 (HCAb3)	A [auth O], C [auth A], E [auth C], G [auth E], I [auth G], K [auth I], M [auth K], O [auth M], Q [auth P], S [auth R]	128	Vicugna pacos	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
C-reactive protein	B [auth S], D [auth B], F [auth D], H [auth F], J [auth H], L [auth J], N [auth L], P [auth N], R [auth Q], T	206	Homo sapiens	Mutation(s): 0  Gene Names: CRP, PTX1
UniProt & NIH Common Fund Data Resources
Find proteins for P02741 (Homo sapiens) Explore P02741  Go to UniProtKB:  P02741
PHAROS:  P02741 GTEx:  ENSG00000132693

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.65 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: 2025-10-22 
Deposition Author(s): Li, Y.J.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2025-10-22
  Type: Initial release