Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 92.24 kDa 
• Atom Count: 6,870 
• Modelled Residue Count: 767 
• Deposited Residue Count: 774 
• Unique protein chains: 3

 7LGT

HLA-B*07:02 in complex with 229E-derived coronavirus nucleocapsid peptide N75-83

• PDB DOI: 10.2210/pdb7LGT/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens, Human coronavirus 229E
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2021-01-21 Released: 2021-04-21 
• Deposition Author(s): Gras, S., Szeto, C., Chatzileontiadou, D.S.M.
• Funding Organization(s): National Health and Medical Research Council (NHMRC, Australia), Australian Research Council (ARC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free: 0.246 
• R-Value Work: 0.189 
• R-Value Observed: 0.192 

Literature

CD8 + T cells specific for an immunodominant SARS-CoV-2 nucleocapsid epitope cross-react with selective seasonal coronaviruses.

Lineburg, K.E., Grant, E.J., Swaminathan, S., Chatzileontiadou, D.S.M., Szeto, C., Sloane, H., Panikkar, A., Raju, J., Crooks, P., Rehan, S., Nguyen, A.T., Lekieffre, L., Neller, M.A., Tong, Z.W.M., Jayasinghe, D., Chew, K.Y., Lobos, C.A., Halim, H., Burrows, J.M., Riboldi-Tunnicliffe, A., Chen, W., D'Orsogna, L., Khanna, R., Short, K.R., Smith, C., Gras, S.

(2021) Immunity 54: 1055

• PubMed: 33945786 
• DOI: 10.1016/j.immuni.2021.04.006
• Primary Citation of Related Structures:  
  7LGD, 7LGT


• PubMed Abstract: 
  

Efforts are being made worldwide to understand the immune response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus responsible for the coronavirus disease 2019 (COVID-19) pandemic, including the impact of T cell immunity and cross-recognition with seasonal coronaviruses. Screening of SARS-CoV-2 peptide pools revealed that the nucleocapsid (N) protein induced an immunodominant response in HLA-B7 ⁺ COVID-19-recovered individuals that was also detectable in unexposed donors. A single N-encoded epitope that was highly conserved across circulating coronaviruses drove this immunodominant response. In vitro peptide stimulation and crystal structure analyses revealed T cell-mediated cross-reactivity toward circulating OC43 and HKU-1 betacoronaviruses but not 229E or NL63 alphacoronaviruses because of different peptide conformations. T cell receptor (TCR) sequencing indicated that cross-reactivity was driven by private TCR repertoires with a bias for TRBV27 and a long CDR3β loop. Our findings demonstrate the basis of selective T cell cross-reactivity for an immunodominant SARS-CoV-2 epitope and its homologs from seasonal coronaviruses, suggesting long-lasting protective immunity.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HLA class I histocompatibility antigen, B alpha chain	A, C	278	Homo sapiens	Mutation(s): 0  Gene Names: HLA-B, HLAB
UniProt & NIH Common Fund Data Resources
Find proteins for P01889 (Homo sapiens) Explore P01889  Go to UniProtKB:  P01889
PHAROS:  P01889

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta-2-microglobulin	B, D	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

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Nucleoprotein peptide N75-83	E, F	9	Human coronavirus 229E	Mutation(s): 0  Gene Names: N, 7
UniProt
Find proteins for P15130 (Human coronavirus 229E) Explore P15130  Go to UniProtKB:  P15130

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BR	AA [auth B]	BROMIDE ION Br CPELXLSAUQHCOX-UHFFFAOYSA-M
ZN	DA [auth C], EA [auth C], FA [auth C], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A], OA [auth D], W [auth B], X [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
K	BA [auth B], CA [auth B], KA [auth C], LA [auth C], MA [auth C], NA [auth C], PA [auth F], QA [auth F], S [auth A], T [auth A], U [auth A], V [auth A]	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N
CL	JA [auth C], M [auth A], N [auth A], O [auth A], P [auth A], Q [auth A], R [auth A], Y [auth B], Z [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
NA	GA [auth C], HA [auth C], IA [auth C], L [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.97 Å
• R-Value Free: 0.246 
• R-Value Work: 0.189 
• R-Value Observed: 0.192 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.144	α = 77.15
b = 62.854	β = 77
c = 63.01	γ = 77.86

Software Package:

Software Name	Purpose
BUSTER	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing
PDB_EXTRACT	data extraction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-04-21 
Deposition Author(s): Gras, S., Szeto, C., Chatzileontiadou, D.S.M.

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Funding Organization	Location	Grant Number
National Health and Medical Research Council (NHMRC, Australia)	Australia	--
Australian Research Council (ARC)	Australia	--

Revision History  

• Version 1.0: 2021-04-21
  Type: Initial release
  
• Version 1.1: 2021-05-19
  Changes: Database references
• Version 1.2: 2021-05-26
  Changes: Database references
• Version 1.3: 2021-08-11
  Changes: Database references, Source and taxonomy, Structure summary