9O6C | pdb_00009o6c

X-ray structure of a bivalent diabody of 8B6, a murine monoclonal antibody specific for the human serotonin transporter

• PDB DOI: https://doi.org/10.2210/pdb9O6C/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2025-04-12 Released: 2025-06-18 
• Deposition Author(s): Coleman, J.A., Gouaux, E.
• Funding Organization(s): Howard Hughes Medical Institute (HHMI)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.58 Å
• R-Value Free: 
  0.233 (Depositor), 0.235 (DCC) 
• R-Value Work: 
  0.199 (Depositor) 
• R-Value Observed: 
  0.205 (Depositor) 

Starting Model: experimental

Literature

X-ray structure of a bivalent diabody of 8B6, a murine monoclonal antibody specific for the human serotonin transporter

Coleman, J.A., Gouaux, E.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 3 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 157.51 kDa 
• Atom Count: 7,139 
• Modeled Residue Count: 902 
• Deposited Residue Count: 1,404 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
8B6 diabody	A, B, C [auth G], D [auth H], E [auth C], F [auth D]	234	Mus musculus	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.58 Å
• R-Value Free:  0.233 (Depositor), 0.235 (DCC) 
• R-Value Work:  0.199 (Depositor) 
• R-Value Observed: 0.205 (Depositor) 

Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 78.47	α = 90
b = 78.47	β = 90
c = 253	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2025-06-18 
Deposition Author(s): Coleman, J.A., Gouaux, E.

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Funding Organization	Location	Grant Number
Howard Hughes Medical Institute (HHMI)	United States	--

Revision History  

• Version 1.0: 2025-06-18
  Type: Initial release