Biological Assembly 1  

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: microscopy

Macromolecule Content

• Total Structure Weight: 459.49 kDa 
• Atom Count: 27,627 
• Modelled Residue Count: 3,321 
• Deposited Residue Count: 3,930 
• Unique protein chains: 1

 6XR8

Distinct conformational states of SARS-CoV-2 spike protein

• PDB DOI: 10.2210/pdb6XR8/pdb
• EM Map EMD-22292: EMDB EMDataResource

• Classification: VIRAL PROTEIN
• Organism(s): Severe acute respiratory syndrome coronavirus 2
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2020-07-11 Released: 2020-07-22 
• Deposition Author(s): Zhang, J., Cai, Y.F., Xiao, T.S., Peng, H.Q., Sterling, S.M., Walsh Jr, R.M., Rawson, S., Volloch, S.R., Chen, B.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.90 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Distinct conformational states of SARS-CoV-2 spike protein.

Cai, Y., Zhang, J., Xiao, T., Peng, H., Sterling, S.M., Walsh Jr., R.M., Rawson, S., Rits-Volloch, S., Chen, B.

(2020) Science 369: 1586-1592

• PubMed: 32694201 
• DOI: 10.1126/science.abd4251
• Primary Citation of Related Structures:  
  6XR8, 6XRA


• PubMed Abstract: 
  

Intervention strategies are urgently needed to control the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic. The trimeric viral spike (S) protein catalyzes fusion between viral and target cell membranes to initiate infection. Here, we report two cryo-electron microscopy structures derived from a preparation of the full-length S protein, representing its prefusion (2.9-angstrom resolution) and postfusion (3.0-angstrom resolution) conformations, respectively. The spontaneous transition to the postfusion state is independent of target cells. The prefusion trimer has three receptor-binding domains clamped down by a segment adjacent to the fusion peptide. The postfusion structure is strategically decorated by N-linked glycans, suggesting possible protective roles against host immune responses and harsh external conditions. These findings advance our understanding of SARS-CoV-2 entry and may guide the development of vaccines and therapeutics.

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Organizational Affiliation: 

Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spike glycoprotein	A, B, C	1,310	Severe acute respiratory syndrome coronavirus 2	Mutation(s): 0  Gene Names: S, 2
UniProt
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2) Explore P0DTC2  Go to UniProtKB:  P0DTC2

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	BA [auth cA], D [auth I], EA [auth kA], G [auth Q], HA [auth sA], IA [auth vA], J [auth Y], JA [auth yA], K [auth b], KA [auth 1A], L [auth e], LA [auth 4A], M [auth h], N [auth k], P [auth x], S [auth 5], V [auth DA], W [auth GA], X [auth JA], Y [auth MA], Z [auth PA]	3		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G62182OO GlyCosmos:  G62182OO GlyGen:  G62182OO

Entity ID: 3
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	CA [auth fA], E [auth L], FA [auth oA], GA [auth qA], H [auth U], I [auth W], Q [auth 0], T [auth 9], U [auth BA]	2		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT GlyCosmos:  G42666HT GlyGen:  G42666HT

Entity ID: 4
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose	DA [auth hA], F [auth N], R [auth 2]	3		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G21290RB GlyCosmos:  G21290RB GlyGen:  G21290RB

Entity ID: 5
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	AA [auth SA], MA [auth 7A], O [auth n]	4		N-Glycosylation
Glycosylation Resources
GlyTouCan:  G48068RF GlyCosmos:  G48068RF GlyGen:  G48068RF

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG (Subject of Investigation/LOI)	AB [auth B], BB [auth C], CB [auth C], DB [auth C], EB [auth C], FB [auth C], GB [auth C], HB [auth C], NA [auth A], OA [auth A], PA [auth A], QA [auth A], RA [auth A], SA [auth A], TA [auth A], UA [auth B], VA [auth B], WA [auth B], XA [auth B], YA [auth B], ZA [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.90 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2020-07-22 
Deposition Author(s): Zhang, J., Cai, Y.F., Xiao, T.S., Peng, H.Q., Sterling, S.M., Walsh Jr, R.M., Rawson, S., Volloch, S.R., Chen, B.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	AI147884
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	AI147884 01A1S1

Revision History  

• Version 1.0: 2020-07-22
  Type: Initial release
  
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
• Version 3.0: 2020-11-18
  Type: Coordinate replacement
  Reason: Sequence discrepancy
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Other, Refinement description, Structure summary
• Version 3.1: 2020-11-25
  Changes: Database references