SAXSdb — 8sit

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

Spike protein S1

Severe acute respiratory syndrome coronavirus 2

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	CC84.24 fab heavy chain × 1 CC84.24 fab light chain × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 3	CC84.24 fab heavy chain × 1 CC84.24 fab light chain × 1	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 3	CC84.24 fab heavy chain × 1 CC84.24 fab light chain × 1	Consistent with protein count
4	Protein heterocomplex	Heteromer	Protein 3	CC84.24 fab heavy chain × 1 CC84.24 fab light chain × 1 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	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 1–198； UniProt 333–530 Author chain B； PDBConstruct 1–198； UniProt 333–530 Author chain C； PDBConstruct 1–198； UniProt 333–530 Author chain D； PDBConstruct 1–198； UniProt 333–530

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	8sit
Deposition date deposition_date	2023-04-16
Structure title title	Crystal structure of SARS-CoV-2 spike receptor-binding domain in complex with broadly neutralizing antibody CC84.24 Fab
Keywords keywords	bnAb, SARS-CoV-2, broadly neutralizing antibody, spike, RBD, IMMUNE SYSTEM; IMMUNE SYSTEM
Experimental Method method	X-RAY DIFFRACTION

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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.

8sit__assembly_1__model_1

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

Download this curve (.dat)

8sit__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

8sit__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	29.39 Å
Rg (electron density)	28.82 Å
Total Rg	29.53 Å
Atom count	4648
Residues	626
Excluded volume	81572 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`8sit__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`8sit__assembly_2__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`8sit__assembly_3__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`8sit__assembly_4__model_1`	trimeric （3）	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 (4)

Entity 1 Entity 1 polymer

Description description	Spike protein S1
Molecular weight formula_weight	23104.9 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	18011

TNLCPFGEVFNATRFASVYAWNRKRISNCVADYSVLYNSASFSTFKCYGVSPTKLNDLCFTNVYADSFVIRGDEVRQIAPGQTGKIADYNYKLPDDFTGCVIAWNSNNLDSKVGGNYNYLYRLFRKSNLKPFERDISTEIYQAGSTPCNGVEGFNCYFPLQSYGFQPTNGVGYQPYRVVVLSFELLHAPATVCGPKKSGHHHHHH

Source Source

Source organism organism	Severe acute respiratory syndrome coronavirus 2
NCBI taxonomy ID ncbi_taxonomy_id	2697049
Host organism host_organism	Trichoplusia ni

Entity 2 Entity 2 polymer

Description description	CC84.24 fab heavy chain
Molecular weight formula_weight	24752.7 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	H,M,O,Q

EVQLVESGGGLVKPGGSLRLSCAASGFTFSPYSMNWVRQAPGKGLEWVSSIRSSGNYISYADSVKGRFTISRDNAKNSLYLQMNSLRAEDMAVYYCARAGRDYYDRSGYQRFPGFDYWGQGTLVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKRVEPKSC

Source Source

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

Entity 3 Entity 3 polymer

Description description	CC84.24 fab light chain
Molecular weight formula_weight	22715.0 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L,N,P,S

QSALTQPPSVSVAPGQTARITCGGNNIGSKGVQWYQQKPGQAPVLVVYDDSDRPSGIPERFSGSNSGNTATLTISRVEAGDEADYYCQVWDSSSDHWVFGGGTKLTVLGQPKAAPSVTLFPPSSEELQANKATLVCLISDFYPGAVTVAWKADSSPVKAGVETTTPSKQSNNKYAASSYLSLTPEQWKSHRSYSCQVTHEGSTVEKTVAPTECS

Source Source

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

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	2

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Unit-cell length a length_a	101.394 Å
Unit-cell length b length_b	105.980 Å
Unit-cell length c length_c	247.040 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	16

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.910 Å
Low-resolution limit resolution_low	48.700 Å
R factor r_factor	0.2634
R_work r_work	0.2611
R_free r_free	0.3091

Crystal structure of SARS-CoV-2 spike receptor-binding domain in complex with broadly neutralizing antibody CC84.24 Fab

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

Spike protein S1

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

8sit__assembly_1__model_1

8sit__assembly_1__model_1 | I(q)

8sit__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (4)

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

7. Citations (2)

Crystal structure of SARS-CoV-2 spike receptor-binding domain in complex with broadly neutralizing antibody CC84.24 Fab

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

Spike protein S1

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

8sit__assembly_1__model_1

8sit__assembly_1__model_1 | I(q)

8sit__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (4)

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

7. Citations (2)