9T31 | pdb_00009t31

Spindlin family member 4 with crystallization epitope mutations G129S:H131E

• PDB DOI: https://doi.org/10.2210/pdb9T31/pdb

• Classification: PEPTIDE BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2025-10-24 Released: 2025-11-05 
• Deposition Author(s): Fairhead, M., Strain-Damerell, C., Ye, M., Mackinnon, S.R., Pinkas, D., MacLean, E.M., Koekemoer, L., Bowesman-Jones, H., Damerell, D., Krojer, T., Arrowsmith, C.H., Edwards, A., Bountra, C., Yue, W., Burgess-Brown, N., Marsden, B., von Delft, F.
• Funding Organization(s): The Structural Genomics Consortium (SGC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.04 Å
• R-Value Free: 
  0.300 (Depositor), 0.290 (DCC) 
• R-Value Work: 
  0.263 (Depositor), 0.251 (DCC) 
• R-Value Observed: 
  0.265 (Depositor) 

Starting Model: experimental

Literature

A fast, parallel method for efficiently exploring crystallization behaviour of large numbers of protein variants

Fairhead, M., Strain-Damerell, C., Ye, M., Mackinnon, S.R., Pinkas, D., MacLean, E.M., Koekemoer, L., Bowesman-Jones, H., Damerell, D., Krojer, T., Arrowsmith, C.H., Edwards, A., Bountra, C., Yue, W., Burgess-Brown, N., Marsden, B., von Delft, F.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 49.81 kDa 
• Atom Count: 3,316 
• Modeled Residue Count: 394 
• Deposited Residue Count: 432 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spindlin-4	A, B	216	Homo sapiens	Mutation(s): 2  Gene Names: SPIN4
UniProt & NIH Common Fund Data Resources
Find proteins for Q56A73 (Homo sapiens) Explore Q56A73  Go to UniProtKB:  Q56A73
PHAROS:  Q56A73 GTEx:  ENSG00000186767

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.04 Å
• R-Value Free:  0.300 (Depositor), 0.290 (DCC) 
• R-Value Work:  0.263 (Depositor), 0.251 (DCC) 
• R-Value Observed: 0.265 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.78	α = 90
b = 61.95	β = 96.86
c = 84.9	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
xia2	data reduction
xia2	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-11-05 
Deposition Author(s): Fairhead, M., Strain-Damerell, C., Ye, M., Mackinnon, S.R., Pinkas, D., MacLean, E.M., Koekemoer, L., Bowesman-Jones, H., Damerell, D., Krojer, T., Arrowsmith, C.H., Edwards, A., Bountra, C., Yue, W., Burgess-Brown, N., Marsden, B., von Delft, F.

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Funding Organization	Location	Grant Number
The Structural Genomics Consortium (SGC)	Canada	--

Revision History  

• Version 1.0: 2025-11-05
  Type: Initial release