9btc

Cryo-EM density map of HKU1 spike glycoprotein D1 domain in complex with 9O-acetyl GD3 sialoglycan (Up state, locally refined)

Method: ELECTRON MICROSCOPY D_max: 74.6 Å Quality: GOOD

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Spike glycoprotein

Human coronavirus HKU1

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Other combination Monomer Protein × 1 其他Polymer 2 PDB declaration: monomeric（1） Consistent with protein copy count	Chain A； UniProt 14–1223	Fragment：ectodomain (UNP residues 14-1298)	;alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 1	ELECTRON MICROSCOPY cryo-EM buffer：pH 8 cryo-EM vitrification conditions：Cryogen ETHANE	Resolution 2.41 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 9BTC	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
5GNB Crystal Structure of the Receptor Binding Domain of the Spike Glycoprotein of Human Betacoronavirus HKU1 (HKU1 1A-CTD, 2.3 angstrom, native-SAD phasing) Deposited 2016-07-20	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 307–677（371 aa） Fragment：UNP residues 307-677	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；291 K；0.1M Tris, 24%PEG4000, 0.2M MgCl2, 4% v/v Pentaerythritol ethoxylate (3/4 EO/OH)	Resolution 2.30 Å R-free 0.219
5KWB Crystal Structure of the Receptor Binding Domain of the Spike Glycoprotein of Human Betacoronavirus HKU1 (HKU1 1A-CTD, 1.9 angstrom, molecular replacement) Deposited 2016-07-17	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 307–677（371 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 MG MAGNESIUM ION × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；291 K；0.1M Tris, 24%PEG4000, 0.2M MgCl2	Resolution 1.91 Å R-free 0.201
8DGW Crystal structure of HCoV-HKU1 spike stem helix peptide in complex with Fab of broadly neutralizing antibody CC95.108 isolated from a vaccinated COVID-19 convalescent Deposited 2022-06-24	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain G 1226–1250（25 aa） Fragment：stem helix domain, residues 1226-1250	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；0.2 M Ammonium formate, 20% (w/v) PEG 3350	Resolution 2.81 Å R-free 0.248
8DGW Crystal structure of HCoV-HKU1 spike stem helix peptide in complex with Fab of broadly neutralizing antibody CC95.108 isolated from a vaccinated COVID-19 convalescent Deposited 2022-06-24	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain I 1226–1250（25 aa） Fragment：stem helix domain, residues 1226-1250	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；0.2 M Ammonium formate, 20% (w/v) PEG 3350	Resolution 2.81 Å R-free 0.248
8DGW Crystal structure of HCoV-HKU1 spike stem helix peptide in complex with Fab of broadly neutralizing antibody CC95.108 isolated from a vaccinated COVID-19 convalescent Deposited 2022-06-24	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 3 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain J 1226–1250（25 aa） Fragment：stem helix domain, residues 1226-1250	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；0.2 M Ammonium formate, 20% (w/v) PEG 3350	Resolution 2.81 Å R-free 0.248
8DGW Crystal structure of HCoV-HKU1 spike stem helix peptide in complex with Fab of broadly neutralizing antibody CC95.108 isolated from a vaccinated COVID-19 convalescent Deposited 2022-06-24	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 4 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain K 1226–1250（25 aa） Fragment：stem helix domain, residues 1226-1250	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293.15 K；0.2 M Ammonium formate, 20% (w/v) PEG 3350	Resolution 2.81 Å R-free 0.248
8VGT Structure of the HKU1 RBD bound to the human TMPRSS2 receptor Deposited 2023-12-27	Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 320–614（295 aa） Fragment：RBD	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.90 Å
8Y7X Structure of HCoV-HKU1A spike in the functionally anchored-3up conformation with 3TMPRSS2 Deposited 2024-02-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 14–1281（1268 aa） Chain B 14–1281（1268 aa） Chain C 14–1281（1268 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 23	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.09 Å
8Y7Y Local structure of HCoV-HKU1A spike in complex with TMPRSS2 and glycan Deposited 2024-02-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 14–1281（1268 aa） Chain B 14–1281（1268 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4 MJJ methyl 9-O-acetyl-5-acetamido-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosidonic acid × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.24 Å
8YOY Structure of HKU1A RBD with TMPRSS2 Deposited 2024-03-14	Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 307–677（371 aa） Fragment：RBD domain	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.21 Å
9BSW Cryo-EM structure of HCoV-HKU1 Spike glycoprotein (DDA state) Deposited 2024-05-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain B 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain C 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 36	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.06 Å
9BSX Cryo-EM structure of HCoV-HKU1 glycoprotein in complex with 9O-acetyl GD3 sialoglycan (DAA state) Deposited 2024-05-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain B 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain C 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 39 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.37 Å
9BSY Cryo-EM structure of HCoV-HKU1 glycoprotein in complex with 9O-acetyl GD3 sialoglycan (DAU state) Deposited 2024-05-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain B 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain C 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 31 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.58 Å
9BSZ Cryo-EM structure of HCoV-HKU1 glycoprotein in complex with 9O-acetyl GD3 sialoglycan (AUU state) Deposited 2024-05-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain B 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain C 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 32 A1AR2 5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl-(2->8)-5-acetamido-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl-(2->3)-beta-D-galactopyranose × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.49 Å
9BT0 Cryo-EM structure of HCoV-HKU1 Spike glycoprotein (DDD state) Deposited 2024-05-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain B 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain C 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 39	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.23 Å
9BT1 Cryo-EM structure of HCoV-HKU1 glycoprotein in complex with 9O-acetyl GD3 sialoglycan (UUU state) Deposited 2024-05-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain B 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain C 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 30 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.22 Å
9BT2 Cryo-EM structure of HCoV-HKU1 glycoprotein D1 (Down State, locally refined) Deposited 2024-05-14	Different construct Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 1.93 Å
9BT9 Cryo-EM Structure of HKU1 spike D1 Domain (Active state, locally refined) Deposited 2024-05-14	Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.11 Å
9BTA Cryo-EM density map of HKU1 spike glycoprotein D1 domain in complex with 9O-acetyl GD3 sialoglycan (Down_alt state, locally refined) Deposited 2024-05-14	Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.39 Å
9BTB Cryo-EM density map of HKU1 spike glycoprotein D1 domain in complex with 9O-acetyl GD3 sialoglycan (Active state, locally refined) Deposited 2024-05-14	Different construct Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.33 Å
9BTD Cryo-EM structure of HCoV-HKU1 glycoprotein in complex with 9O-acetyl GD3 sialoglycan (DDA state) Deposited 2024-05-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain B 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain C 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 37 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 2.43 Å
9IZN Crystal structure of HKU1A RBD bound to TMPRSS2 Deposited 2024-08-01	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 307–677（371 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；291 K；2% v/v Tacsimate pH 7.0, 5% v/v 2-Propanol, 0.1 M Imidazole (pH 7.0) and 8% w/v Polyethylene glycol 3350	Resolution 2.40 Å R-free 0.261
9JCX Crystal structure of the HCoV-HKU1 RBD and TMPRSS2 Deposited 2024-08-30	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 323–609（287 aa）	Not recorded	CA CALCIUM ION × 1 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3	X-RAY DIFFRACTION X-ray crystallization conditions EVAPORATION；293 K；0.2 M Tris pH 7.0, 0.2 M MgCl2, 10% (w/v) Polyethylene glycol 8,000	Resolution 2.75 Å R-free 0.237
9JCY Crystal structure of the HCoV-HKU1 RBD in complex with Fab Deposited 2024-08-30	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 323–609（287 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 GOL GLYCEROL × 4	X-RAY DIFFRACTION X-ray crystallization conditions EVAPORATION；293 K；0.2% (w/v) Ala-Ala, 0.2% (w/v) Ala-Gln, 0.2% (w/v) Gly-Glu, 0.2% (w/v) Gly-L-Ala, 0.2% (w/v) Gly-L-Asp, 0.2% (w/v) Gly-Sar, 0.2% (w/v) L-Carnosine, 0.2% (w/v) Leu-Ala hydrate, 0.1 M Buffer System 3 [Tris (base); BICINE] pH 8.5, 20% (v/v) PEG 500* MME, 10 % w/v PEG 20,000; for TMPRSS2:VHH77, 0.2 M sodium malonate pH 6.0, 10% (w/v) Polyethylene glycol 3,350	Resolution 1.80 Å R-free 0.203
9N12 Cryo-EM structure of HCoV-HKU1 glycoprotein (mutant T31VPR34 to GGGG) Deposited 2025-01-24	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Chain B 14–1298（1285 aa） Chain C 14–1298（1285 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 39	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.18 Å
9N13 Cryo-EM structure of HCoV-HKU1 glycoprotein D1 Domain (mutant T31VPR34 to GGGG) Deposited 2025-01-24	Different construct Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain B 14–1298（1285 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 5	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.34 Å
9N14 Cryo-EM structure of HCoV-HKU1 glycoprotein in complex with 9OAc-GD3(mutant T31VPR34 to GGGG) Deposited 2025-01-24	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain B 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298) Chain C 14–1298（1285 aa） Fragment：ectodomain (UNP residues 14-1298)	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 35 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.08 Å
9N15 Cryo-EM structure of HCoV-HKU1 glycoprotein D1 Domain in complex with 9OAc-GD3(mutant T31VPR34 to GGGG) Deposited 2025-01-24	Different construct Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 14–1298（1285 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 2 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.20 Å
9N16 Cryo-EM structure of HCoV-HKU1 glycoprotein (Deletion 33Pro34Arg) Deposited 2025-01-24	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Chain B 14–1298（1285 aa） Chain C 14–1298（1285 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 39	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.01 Å
9N17 Cryo-EM structure of HCoV-HKU1 glycoprotein D1 Domain (Deletion 33Pro34Arg) Deposited 2025-01-24	Different construct Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 14–1298（1285 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.09 Å
9N18 Cryo-EM structure of HCoV-HKU1 spike glycoprotein in complex with 9OAc-GD3 tetrasacchride (Deletion 33Pro34Arg) Deposited 2025-01-24	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 3 PDB declaration: trimeric	Chain A 14–1298（1285 aa） Chain B 14–1298（1285 aa） Chain C 14–1298（1285 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 39 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 3	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.02 Å
9N19 Cryo-EM structure of HCoV-HKU1spike glycoprotein D1 Domain in complex with 9OAc-GD3 tetrasacchride (Deletion 33Pro34Arg) Deposited 2025-01-24	Different construct Different structure-quality metrics	Assembly 1 Other combination Monomer；Protein × 1 PDB declaration: monomeric	Chain A 14–1298（1285 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 A1AR1 5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.02 Å
9OPQ TMPRSS2 (S441A) bound to the HCoV-NL63 S2'region genetically fused to the HCoV-HKU1 RBD Deposited 2025-05-19	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 320–509（190 aa） Chain A 511–614（104 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.30 Å

30 other PDB entries and 33 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	SPIKE_CVHN1
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–1194； UniProt 14–1223

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

Download Download SAXS (.dat) P(r) (.pr.out) CIF

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	9btc
Deposition date deposition_date	2024-05-14
Structure title title	Cryo-EM density map of HKU1 spike glycoprotein D1 domain in complex with 9O-acetyl GD3 sialoglycan (Up state, locally refined)
Keywords keywords	HKU1 spike glycoprotein ectodomain, proline stablized, VIRAL PROTEIN; VIRAL PROTEIN
Experimental Method method	ELECTRON MICROSCOPY

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	20.53 Å
Radius of gyration Rg (electron density) rg_electron	19.58 Å
Forward intensity I(0) i0	36017800.00
Molecular weight molecular_weight	31776.0 kDa
Excluded volume excluded_volume	31194 Å³
Envelope volume envelope_volume	49954 Å³
Hydration-shell volume shell_volume	21242 Å³
Envelope diameter envelope_diameter	78.5 Å
Shell Rg shell_rg	26.36 Å
Envelope Rg envelope_rg	20.13 Å
Shape Rg shape_rg	19.52 Å
Total Rg total_rg	20.40 Å
Total atoms total_atoms	2409
Residues n_residues	268
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	74.6 Å
Rg (real space) rg_real	20.50 Å
Rg uncertainty (real space) rg_real_error	0.61 Å
I(0) (real space) i0_real	3.6020e+07
I(0) uncertainty (real space) i0_real_error	5.0860e+05
Rg (reciprocal space) rg_reciprocal	20.50 Å
I(0) (reciprocal space) i0_reciprocal	36020000.0000
Solution quality estimate total_estimate	0.7558
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	3
Primary peak position r_peak_primary	24.9 Å
Skewness Skewness skewness	0.379
Kurtosis Kurtosis kurtosis	-0.053
Angular range angular_range	— – 0.3850 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	8650000.0000
Real-space data points n_real_points	70
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.620; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.964; Smooth: 0.000

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Description description	Spike glycoprotein
Molecular weight formula_weight	133185.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2409

VIGDFNCTNFAINDLNTTVPRISEYVVDVSYGLGTYYILDRVYLNTTILFTGYFPKSGANFRDLSLKGTTYLSTLWYQKPFLSDFNNGIFSRVKNTKLYVNKTLYSEFSTIVIGSVFINNSYTIVVQPHNGVLEITACQYTMCEYPHTICKSKGSSRNESWHFDKSEPLCLFKKNFTYNVSTDWLYFHFYQERGTFYAYYADSGMPTTFLFSLYLGTLLSHYYVLPLTCNAISSNTDNETLQYWVTPLSKRQYLLKFDNRGVITNAVDCSSSFFSEIQCKTKSLLPNTGVYDLSGFTVKPVATVHRRIPDLPDCDIDKWLNNFNVPSPLNWERKIFSNCNFNLSTLLRLVHTDSFSCNNFDESKIYGSCFKSIVLDKFAIPNSRRSDLQLGSSGFLQSSNYKIDTTSSSCQLYYSLPAINVTINNYNPSSWNRRYGFNNFNLSSHSVVYSRYCFSVNNTFCPCAKPSFASSCKSHKPPSASCPIGTNYRSCESTTVLDHTDWCRCSCLPDPITAYDPRSCSQKKSLVGVGEHCAGFGVDEEKCGVLDGSYNVSCLCSTDAFLGWSYDTCVSNNRCNIFSNFILNGINSGTTCSNDLLQPNTEVFTDVCVDYDLYGITGQGIFKEVSAVYYNSWQNLLYDSNGNIIGFKDFVTNKTYNIFPCYAGRVSAAFHQNASSLALLYRNLKCSYVLNNISLTTQPYFDSYLGCVFNADNLTDYSVSSCALRMGSGFCVDYNSYRFVTFEPFNVSFVNDSIESVGGLYEIKIPTNFTIVGQEEFIQTNSPKVTIDCSLFVCSNYAACHDLLSEYGTFCDNINSILDEVNGLLDTTQLHVADTLMQGVTLSSNLNTNLHFDVDNINFKSLVGCLGPHCGSSSRSFFEDLLFDKVKLSDVGFVEAYNNCTGGSEIRDLLCVQSFNGIKVLPPILSESQISGYTTAATVAAMFPPWSAAAGIPFSLNVQYRINGLGVTMDVLNKNQKLIATAFNNALLSIQNGFSAPNSALAKIQSVVNSNAQALNSLLQQLFNKFGAISSSLQEILSRLDPPEAQVQIDRLINGRLTALNAYVSQQLSDISLVKFGAALAMEKVNECVKSQSPRINFCGNGNHILSLVQNAPYGLLFMHFSYKPISFKTVLVSPGLCISGDVGIAPKQGYFIKHNDHWMFTGSSYYYPEPISDKNVVFMNTCSVNFTKAPLVY

来源 Source

来源生物 organism	Human coronavirus HKU1
NCBI Class编号 ncbi_taxonomy_id	290028
宿主生物 host_organism	Homo sapiens

Entity 2 Entity 2 branched

Description description	;alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose ;
Molecular weight formula_weight	910.8 kDa
Source method src_method	man
Copy count entity_count	1

Entity 3 Entity 3 branched

Description description	2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	424.4 kDa
Source method src_method	man
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	221.2 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 5 Entity 5 non-polymer

Description description	;5-acetamido-8-O-(5-acetamido-9-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranonosyl)-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosonic acid ;
Molecular weight formula_weight	642.6 kDa
Source method src_method	syn
Copy count entity_count	1

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8. Citations (1)

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	—

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	2.41 Å
Resolution测定方法 resolution_method	—
颗粒数 num_particles	3576676

fit	/app/data/saxs_computation/bt/9btc/9btc.fit
pddf	/app/data/pr_computation/bt/9btc/9btc.pr.out
profile	/app/data/saxs_computation/bt/9btc/9btc.dat