9JL0 | pdb_00009jl0

Crystal structure of feline CD8aa homodimer

PDB DOI: https://doi.org/10.2210/pdb9JL0/pdb

Classification: IMMUNE SYSTEM
Organism(s): Felis catus
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2024-09-17 Released: 2025-07-02
Deposition Author(s): Li, Z., Liang, R.
Funding Organization(s): National Natural Science Foundation of China (NSFC)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.48 Å
R-Value Free:
0.250 (Depositor), 0.251 (DCC)
R-Value Work:
0.205 (Depositor), 0.212 (DCC)
R-Value Observed:
0.209 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

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

Literature

Insights into the structural features of a feline CD8 alpha alpha homodimer

Liang, R.Y., Cao, Y.D., Gao, Y.Y., Li, H.Y., Sang, C.J., Xiu, Y.H., Li, D., Liu, D.Z., Gao, F.S., Li, Z.B.

(2025) Dev Comp Immunol 169: 105405

DOI: https://doi.org/10.1016/j.dci.2025.105405

Macromolecule Content

Total Structure Weight: 28.03 kDa
Atom Count: 1,944
Modeled Residue Count: 230
Deposited Residue Count: 246
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
T-cell surface glycoprotein CD8 alpha chain	A, B	123	Felis catus	Mutation(s): 0 Gene Names: CD8A
UniProt
Find proteins for P41688 (Felis catus) Explore P41688 Go to UniProtKB: P41688
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P41688
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.48 Å
R-Value Free: 0.250 (Depositor), 0.251 (DCC)
R-Value Work: 0.205 (Depositor), 0.212 (DCC)
R-Value Observed: 0.209 (Depositor)

Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 132.75	α = 90
b = 132.75	β = 90
c = 44.66	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Released Date: 2025-07-02

Deposition Author(s):

Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	3210210192

Revision History (Full details and data files)

Version 1.0: 2025-07-02
Type: Initial release

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.