8OVB

Human Complement C3b in complex with Trypanosoma brucei ISG65.

• PDB DOI: https://doi.org/10.2210/pdb8OVB/pdb
• EM Map EMD-17209: EMDB EMDataResource

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


• Deposited: 2023-04-25 Released: 2024-02-14 
• Deposition Author(s): Cook, A.D., Higgins, M.K.
• Funding Organization(s): Wellcome Trust

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.40 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Molecular mechanism of complement factor C3b inhibition by the trypanosome ISG65 receptor.

Cook, A.D., Higgins, M.K., Carrington, M.

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: surface plasmon resonance

Macromolecule Content

• Total Structure Weight: 207.82 kDa 
• Atom Count: 13,049 
• Modelled Residue Count: 1,655 
• Deposited Residue Count: 1,846 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Complement C3f fragment	A	642	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P01024 (Homo sapiens) Explore P01024  Go to UniProtKB:  P01024
PHAROS:  P01024 GTEx:  ENSG00000125730

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Complement C3	B	915	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P01024 (Homo sapiens) Explore P01024  Go to UniProtKB:  P01024
PHAROS:  P01024 GTEx:  ENSG00000125730

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
ISG65 G	C	289	Trypanosoma brucei brucei	Mutation(s): 0  Gene Names: ISG65 G
UniProt
Find proteins for A0A8J9S0Z8 (Trypanosoma brucei) Explore A0A8J9S0Z8  Go to UniProtKB:  A0A8J9S0Z8

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.40 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	3
MODEL REFINEMENT	ISOLDE
MODEL REFINEMENT	Coot

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-02-14 
Deposition Author(s): Cook, A.D., Higgins, M.K.

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Funding Organization	Location	Grant Number
Wellcome Trust	United Kingdom	217138/Z/19/Z

Revision History  

• Version 1.0: 2024-02-14
  Type: Initial release