7XQU

The structure of FLA-E*00301/EM-FECV-10

• PDB DOI: https://doi.org/10.2210/pdb7XQU/pdb

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


• Deposited: 2022-05-08 Released: 2023-11-08 
• Deposition Author(s): Qiao, P.W., Yue, C., Peng, W.Y., Liu, K.F., Huo, S.T., Zhang, D., Chai, Y., Qi, J.X., Sun, Z.Y., Gao, G.F., Liu, W.J., Wu, G.Z.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.276 
• R-Value Work: 0.219 
• R-Value Observed: 0.222 

Starting Model: other

Literature

Analysis of the characteristics of feline major histocompatibility complex class I molecules cross-presenting coronavirus peptides

Qiao, P.W., Yue, C., Peng, W.Y., Liu, K.F., Huo, S.T., Zhang, D., Chai, Y., Qi, J.X., Sun, Z.Y., Gao, G.F., Liu, W.J., Wu, G.Z.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 89.25 kDa 
• Atom Count: 6,357 
• Modelled Residue Count: 762 
• Deposited Residue Count: 764 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MHC class I antigen	A, D	274	Felis catus	Mutation(s): 0  Gene Names: FLA-I
UniProt
Find proteins for Q95482 (Felis catus) Explore Q95482  Go to UniProtKB:  Q95482

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	B, E	99	Felis catus	Mutation(s): 0  Gene Names: B2M
UniProt
Find proteins for Q5MGS7 (Felis catus) Explore Q5MGS7  Go to UniProtKB:  Q5MGS7

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
peptide from Nucleoprotein	C, F	9	Feline coronavirus	Mutation(s): 0
UniProt
Find proteins for P25909 (Feline coronavirus (strain FIPV WSU-79/1146)) Explore P25909  Go to UniProtKB:  P25909

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.276 
• R-Value Work: 0.219 
• R-Value Observed: 0.222 
• Space Group: P 4 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 132.221	α = 90
b = 132.221	β = 90
c = 130.846	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PHASER	phasing
Coot	model building

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-11-08 
Deposition Author(s): Qiao, P.W., Yue, C., Peng, W.Y., Liu, K.F., Huo, S.T., Zhang, D., Chai, Y., Qi, J.X., Sun, Z.Y., Gao, G.F., Liu, W.J., Wu, G.Z.

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

Revision History  

• Version 1.0: 2023-11-08
  Type: Initial release