SAXSdb — 11hw

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

E-FICs-v3

Severe acute respiratory syndrome coronavirus 2

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Heteromer	Protein 9	Heavy chain Fab C77G12 × 3 Light chain Fab C77G12 × 3 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 water × 9	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SPIKE_SARS2
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 176–393； UniProt 914–1131 Author chain A； PDBConstruct 395–525； UniProt 703–833 Author chain B； PDBConstruct 176–393； UniProt 914–1131 Author chain B； PDBConstruct 395–525； UniProt 703–833 Author chain G； PDBConstruct 176–393； UniProt 914–1131 Author chain G； PDBConstruct 395–525； UniProt 703–833

E-FICs-v3

Severe acute respiratory syndrome coronavirus 2

UniProt Q12306

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Heteromer	Protein 9	Heavy chain Fab C77G12 × 3 Light chain Fab C77G12 × 3 2-acetamido-2-deoxy-beta-D-glucopyranose × 6 water × 9	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SUMO_YEAST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 21–114； UniProt 1–94 Author chain B； PDBConstruct 21–114； UniProt 1–94 Author chain G； PDBConstruct 21–114； UniProt 1–94

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	11hw
Deposition date deposition_date	2026-02-25
Structure title title	SARS-CoV-2 spike S2 trimer stabilized in the early fusion intermediate conformation (E-FICs-v3) bound to C77G12 (Fab local refinement)
Keywords keywords	;S2prime, coronavirus, SARS-CoV-2, spike, fusion, entry, antiviral, Structural Genomics, Seattle Structural Genomics Center for Infectious Disease, SSGCID, VIRAL PROTEIN complex, C77G12, VIRAL PROTEIN ;; VIRAL PROTEIN
Experimental Method method	ELECTRON MICROSCOPY

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

11hw__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

11hw__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

11hw__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	45.46 Å
Rg (electron density)	45.27 Å
Total Rg	45.13 Å
Atom count	11043
Residues	1542
Excluded volume	194250 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`11hw__assembly_1__model_1`	nonameric （9）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Description description	E-FICs-v3
Molecular weight formula_weight	67787.2 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,G
Atom count atom_count	11136

MTRLTVLALLAGLLASSRASMSDSEVNQEAKPEVKPEVKPETHINLKVSDGSSEIFFKIKKTTPLRRLMEAFAKRQGKEMDSLRFLYDGIRIQADQTPEDLDMEDNDIIEAHRENDDDDKTGTGSQSNAESVQNHTFEVLNNTIRALELILRKLEILYEMILQLHEEVEAIQKAINVLYENQKLIANQFNSAIGKIQDSLSSTASALGKLQDVVNQNAQALNTLVKQLSSNFGAISSVLNDILSRLAKVEAEVQIDRLITGRLQSLQTYVTQQLIRAAEIRASANLAATKMSECVLGQSKRVDFCGKGYHLMSFPQSAPHGVVFLHVTYVPAQEKNFTTAPAICHDGKAHFPREGVFVSNGTHWFVTQRNFYEPQIITTDNTFVSGNCDVVIGTNSVAYSNNSIAIPTNFTISVTTEILPVSMTKTSVDCTMYICGDSTECSNLLLQYGSFCTQLNRALTGIAVEQDKNTQEVFAQVKQIYKTPPIKDFGGFNFSQILPDPSKPSKRSFIEDLLFNKVTLADAGFTIDKEKWKEWRKEMENLTKEIKETLEEARKTLKQAEETFKTPSSGGTDDDDKTGSLNDIFEAQKIEWHEQGSHHHHHHHH

Source Source

Source organism organism	Severe acute respiratory syndrome coronavirus 2
NCBI taxonomy ID ncbi_taxonomy_id	2697049
Host organism host_organism	Homo sapiens

Entity 2 Entity 2 polymer

Description description	Heavy chain Fab C77G12
Molecular weight formula_weight	24069.9 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,E,H

EVQLVESGGGVVQPGRSLRISCAVSGFTFGSYAMHWVRQAPGKGLEWVGVMSSDGHNEYYADSVKGRFTISRDNSRNKLYLEMNNLRVDDTAVFYCARGSDYVDDSPPLHYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKRVEPKSC

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Homo sapiens

Entity 3 Entity 3 polymer

Description description	Light chain Fab C77G12
Molecular weight formula_weight	23175.7 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,F,I

DIQLTQSPSSLSASIGDRVTITCRASQDIANKLAWFQQAPGKAPKSLIYAASRLQSGVPSQFSGSGSGTDFTLTIESLQAGDFATYFCQQYDSFPFTFGPGTKVDVKRTVAAPSVFIFPPSDEQLKSGTASVVCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVYACEVTHQGLSSPVTKSFNRGEC

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Homo sapiens

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 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	93

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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	2.80 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	225859

SARS-CoV-2 spike S2 trimer stabilized in the early fusion intermediate conformation (E-FICs-v3) bound to C77G12 (Fab local refinement)

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

E-FICs-v3

State in the Current Structure

Other States of the Same Protein in the Database

E-FICs-v3

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

11hw__assembly_1__model_1

11hw__assembly_1__model_1 | I(q)

11hw__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

7. Citations (1)

SARS-CoV-2 spike S2 trimer stabilized in the early fusion intermediate conformation (E-FICs-v3) bound to C77G12 (Fab local refinement)

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

E-FICs-v3

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

E-FICs-v3

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

11hw__assembly_1__model_1

11hw__assembly_1__model_1 | I(q)

11hw__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

7. Citations (1)