8UH2

Complex of C3b with the inhibitor albicin

• PDB DOI: https://doi.org/10.2210/pdb8UH2/pdb
• EM Map EMD-42244: EMDB EMDataResource

• Classification: IMMUNE SYSTEM
• Organism(s): Anopheles albimanus, Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2023-10-06 Released: 2024-05-08 
• Deposition Author(s): Andersen, J.F., Lei, H., Strayer, E., Ribeiro, J.M.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.59 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

The mechanism of a mosquito salivary inhibitor of the alternative C3 convertase is elucidated through structural analysis of its complex with C3bBb

Andersen, J.F., Lei, H., Strayer, E., Pham, V., Ribeiro, J.M.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 6-mer - A2B2C2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 378.26 kDa 
• Atom Count: 24,887 
• Modelled Residue Count: 3,307 
• Deposited Residue Count: 3,346 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Albicin	A [auth C], B [auth D]	116	Anopheles albimanus	Mutation(s): 0
UniProt
Find proteins for A0A1Y9G8D0 (Anopheles albimanus) Explore A0A1Y9G8D0  Go to UniProtKB:  A0A1Y9G8D0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Complement C3 beta chain	C [auth A], E [auth G]	642	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P01024 (Homo sapiens) Explore P01024  Go to UniProtKB:  P01024
GTEx:  ENSG00000125730
Glycosylation
Glycosylation Sites: 1		Go to GlyGen: P01024-1

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Complement C3b alpha' chain	D [auth B], F [auth H]	915	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P01024 (Homo sapiens) Explore P01024  Go to UniProtKB:  P01024
GTEx:  ENSG00000125730
Glycosylation
Glycosylation Sites: 1		Go to GlyGen: P01024-1

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	G [auth A], H [auth B], I [auth G], J [auth H]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.59 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	RELION	4.0.1
RECONSTRUCTION	cryoSPARC	3.3.1
MODEL REFINEMENT	PHENIX	1.19.2_4158:

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-05-08 
Deposition Author(s): Andersen, J.F., Lei, H., Strayer, E., Ribeiro, J.M.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	--

Revision History  

• Version 1.0: 2024-05-08
  Type: Initial release