9BX5 | pdb_00009bx5

Human Fab 8C1 in complex with OspCA peptide P4 (residues 141-144)

• PDB DOI: https://doi.org/10.2210/pdb9BX5/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens, Borreliella burgdorferi B31
• Expression System: Cricetulus griseus, Escherichia coli B
• Mutation(s): No 


• Deposited: 2024-05-22 Released: 2025-08-27 
• Deposition Author(s): Rudolph, M.J., Mantis, N.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.57 Å
• R-Value Free: 
  0.170 (Depositor), 0.170 (DCC) 
• R-Value Work: 
  0.142 (Depositor), 0.142 (DCC) 
• R-Value Observed: 
  0.143 (Depositor) 

Starting Model: experimental

Literature

Human Fab 8C1 in complex with OspCA peptide P4 (residues 141-144)

Rudolph, M.J., Mantis, N.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 48.33 kDa 
• Atom Count: 4,028 
• Modeled Residue Count: 430 
• Deposited Residue Count: 444 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
8C1 Fab Heavy Chain	A [auth H]	221	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
8C1 Fab Light Chain	B [auth L]	219	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
P4 peptide from Outer surface protein C	C [auth P]	4	Borreliella burgdorferi B31	Mutation(s): 0  Gene Names: ospC, BB_B19
UniProt
Find proteins for Q07337 (Borreliella burgdorferi (strain ATCC 35210 / DSM 4680 / CIP 102532 / B31)) Explore Q07337  Go to UniProtKB:  Q07337

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	H [auth L]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
CL	D [auth H], E [auth L], F [auth L], G [auth L]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.57 Å
• R-Value Free:  0.170 (Depositor), 0.170 (DCC) 
• R-Value Work:  0.142 (Depositor), 0.142 (DCC) 
• R-Value Observed: 0.143 (Depositor) 

Space Group: P 2₁ 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.657	α = 90
b = 69.389	β = 90
c = 95.102	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-08-27 
Deposition Author(s): Rudolph, M.J., Mantis, N.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	75N93019C00040

Revision History  

• Version 1.0: 2025-08-27
  Type: Initial release