22EE | pdb_000022ee

Structure of HLA-A2:01 with 9-mer peptide PGS

PDB DOI: https://doi.org/10.2210/pdb22EE/pdb

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

Deposited: 2026-01-07 Released: 2026-06-24
Deposition Author(s): Li, Z.B., Liang, R.Y.
Funding Organization(s): Ministry of Science and Technology (MoST, China)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.99 Å
R-Value Free:
0.232 (Depositor)
R-Value Work:
0.193 (Depositor)
R-Value Observed:
0.196 (Depositor)

Starting Model: experimental
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wwPDB Validation

Currently 22EE does not have a validation slider image.

This is version 1.0 of the entry. See complete history.

Literature

Structure of HLA-A2:01 with the 9-mer peptide PGS

Li, Z.B., Liang, R.Y.

To be published.

Macromolecule Content

Total Structure Weight: 44.89 kDa
Atom Count: 3,406
Modeled Residue Count: 383
Deposited Residue Count: 385
Unique protein chains: 3

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HLA class I antigen	A	276	Homo sapiens	Mutation(s): 0 Gene Names: HLA-A
UniProt
Find proteins for Q53Z42 (Homo sapiens) Explore Q53Z42 Go to UniProtKB: Q53Z42
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q53Z42
Sequence Annotations Expand
Reference Sequence

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Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	B	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 Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P61769
Sequence Annotations Expand
Reference Sequence

Find similar proteins by: Sequence | 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
9-mer peptide from T. gondii glycogen synthase	C	9	Toxoplasma gondii	Mutation(s): 0

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.99 Å
R-Value Free: 0.232 (Depositor)
R-Value Work: 0.193 (Depositor)
R-Value Observed: 0.196 (Depositor)

Space Group: I 4

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 123.398	α = 90
b = 123.398	β = 90
c = 64.593	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-3000	data reduction
HKL-3000	data scaling
PHASER	phasing

Structure Validation

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Entry History

& Funding Information

Deposition Data

Released Date: 2026-06-24

Deposition Author(s):

Funding Organization	Location	Grant Number
Ministry of Science and Technology (MoST, China)	China	2024YFD1800303

Revision History (Full details and data files)

Version 1.0: 2026-06-24
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.