8RPE

Crystal structure of the SMA:VH1 Complex at 1.2 A resolution

• PDB DOI: https://doi.org/10.2210/pdb8RPE/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Lama, Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2024-01-15 Released: 2025-01-29 
• Deposition Author(s): Maerivoet, A., Crabbe, T., Antonyuk, S.V., Madine, J.
• Funding Organization(s): Biotechnology and Biological Sciences Research Council (BBSRC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.20 Å
• R-Value Free: 
  0.144 (Depositor), 0.144 (DCC) 
• R-Value Work: 
  0.112 (Depositor), 0.111 (DCC) 

Starting Model: in silico

Literature

Stabilisation of amyloidogenic light chains by displacing native dimer binding interface with the variable heavy domain have potential for therapeutics development

Maerivoet, A., Galmiche, S., Scott-Tucker, A., Crabbe, T., Antonyuk, S., Madine, J.

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.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 27.47 kDa 
• Atom Count: 2,379 
• Modelled Residue Count: 232 
• Deposited Residue Count: 246 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
VH1	A [auth B]	132	Lama	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
SMA	B [auth E]	114	Homo sapiens	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	C [auth B], D [auth E], E, F [auth E], G [auth E], H [auth E], I [auth E]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.20 Å
• R-Value Free:  0.144 (Depositor), 0.144 (DCC) 
• R-Value Work:  0.112 (Depositor), 0.111 (DCC) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.813	α = 90
b = 53.544	β = 90
c = 99.07	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
DIALS	data reduction
Aimless	data scaling
MOLREP	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-01-29 
Deposition Author(s): Maerivoet, A., Crabbe, T., Antonyuk, S.V., Madine, J.

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Funding Organization	Location	Grant Number
Biotechnology and Biological Sciences Research Council (BBSRC)	United Kingdom	--

Revision History  

• Version 1.0: 2025-01-29
  Type: Initial release