9SOL | pdb_00009sol

Structure of TCR-581 in complex with Peptide-HLA

• PDB DOI: https://doi.org/10.2210/pdb9SOL/pdb

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


• Deposited: 2025-09-14 Released: 2026-09-16 
• Deposition Author(s): Karuppiah, V., Rangel, V.L.
• Funding Organization(s): Other private

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.93 Å
• R-Value Free: 
  0.270 (Depositor), 0.268 (DCC) 
• R-Value Work: 
  0.232 (Depositor), 0.240 (DCC) 
• R-Value Observed: 
  0.234 (Depositor) 

Starting Models: experimental

Literature

Isolation of Human TCRs specific to any peptide-HLA complex

Karuppiah, V., Rangel, V.L.

(2026) Nat Commun 

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A1B1C1D1E1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: surface plasmon resonance

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A1B1C1D1E1 

Biological assembly 2 assigned by authors.

Biological Assembly Evidence: surface plasmon resonance

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A1B1C1D1E1 

Biological assembly 3 assigned by authors.

Biological Assembly Evidence: surface plasmon resonance

Biological Assembly 4  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A1B1C1D1E1 

Biological assembly 4 assigned by authors.

Biological Assembly Evidence: surface plasmon resonance

Macromolecule Content 

• Total Structure Weight: 382.22 kDa 
• Atom Count: 26,430 
• Modeled Residue Count: 3,278 
• Deposited Residue Count: 3,340 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MHC class I antigen	A, F, K, P	276	Homo sapiens	Mutation(s): 0  Gene Names: HLA-A
UniProt
Find proteins for A0A5B8RNS7 (Homo sapiens) Explore A0A5B8RNS7  Go to UniProtKB:  A0A5B8RNS7

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	B, G, L, Q	100	Homo sapiens	Mutation(s): 0  Gene Names: B2M, CDABP0092, HDCMA22P
UniProt & NIH Common Fund Data Resources
Find proteins for P61769 (Homo sapiens) Explore P61769  Go to UniProtKB:  P61769
PHAROS:  P61769 GTEx:  ENSG00000166710

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Piwi-like protein 1	C, H, M, R	9	Homo sapiens	Mutation(s): 0  EC: 3.1.26
UniProt & NIH Common Fund Data Resources
Find proteins for Q96J94 (Homo sapiens) Explore Q96J94  Go to UniProtKB:  Q96J94
PHAROS:  Q96J94 GTEx:  ENSG00000125207

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
TCR alpha	D, I, N, S	208	Homo sapiens	Mutation(s): 0

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
TCR beta	E, J, O, T	242	Homo sapiens	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.93 Å
• R-Value Free:  0.270 (Depositor), 0.268 (DCC) 
• R-Value Work:  0.232 (Depositor), 0.240 (DCC) 
• R-Value Observed: 0.234 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 237.232	α = 90
b = 238.081	β = 90
c = 175.587	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
autoPROC	data reduction
autoPROC	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-09-16 
Deposition Author(s): Karuppiah, V., Rangel, V.L.

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Funding Organization	Location	Grant Number
Other private	United Kingdom	--

Revision History  

• Version 1.0: 2026-09-16
  Type: Initial release