AF_AFP09871F1

COMPUTED STRUCTURE MODEL OF COMPLEMENT C1S SUBCOMPONENT

There are no experimental data to verify the accuracy of this computed structure model. See Model Confidence metrics below for all regions of the polypeptide chain

• AlphaFold DB: P09871
• Released in AlphaFold DB:  2021-07-01
  Last Modified in AlphaFold DB: 2025-08-01
• Organism(s): Homo sapiens
• UniProtKB: P09871

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Model Confidence 

• pLDDT (global): 87.9
• pLDDT (local):

Model Confidence 

•   Very high (pLDDT > 90)    
•   Confident (70 < pLDDT ≤ 90)    
•   Low (50 < pLDDT ≤ 70)    
•   Very low (pLDDT ≤ 50)    

Computed Structure Models provide per-residue confidence score (pLDDT) between 0 and 100. Some regions below 50 pLDDT may be unstructured in isolation.

Assembly  

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

Macromolecule Content 

• Total Structure Weight: 76.76 kDa 
• Atom Count: 5,391 
• Modeled Residue Count: 688 
• Deposited Residue Count: 688 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Complement C1s subcomponent	A	688	Homo sapiens	Mutation(s): 0  Gene Names: C1S EC: 3.4.21.42
UniProt & NIH Common Fund Data Resources
Find proteins for P09871 (Homo sapiens) Explore P09871  Go to UniProtKB:  P09871
PHAROS:  P09871 GTEx:  ENSG00000182326