SAXSdb — 8yub

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

;Spike protein S2' ;

Severe acute respiratory syndrome coronavirus 2

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Other combination	Heteromer	Protein 3 其他Polymer 1	Neutralizing antibody CC25.4 heavy chain × 1 Neutralizing antibody CC25.4 light chain × 1 alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 1,2-ETHANEDIOL × 1 water × 3	Consistent with protein count
2	Other combination	Heteromer	Protein 3 其他Polymer 1	Neutralizing antibody CC25.4 heavy chain × 1 Neutralizing antibody CC25.4 light chain × 1 alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 1,2-ETHANEDIOL × 1 water × 3	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	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–197； UniProt 333–529 Author chain F； PDBConstruct 1–197； UniProt 333–529

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	8yub
Deposition date deposition_date	2024-03-27
Last revision last_revision	2025-10-01
Structure title title	Crystal structure of SARS-CoV-2 ConSp RBD in complex with neutralizing antibody CC25.4 Fab
Keywords keywords	Severe acute respiratory syndrome coronavirus 2, Spike protein, Receptor binding domain, 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.

8yub__assembly_1__model_1

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

Download this curve (.dat)

8yub__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

8yub__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	31.77 Å
Rg (electron density)	31.84 Å
Total Rg	32.35 Å
Atom count	4954
Residues	642
Excluded volume	87500 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`8yub__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`8yub__assembly_2__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 (6)

Entity 1 Entity 1 polymer

Description description	Neutralizing antibody CC25.4 heavy chain
Molecular weight formula_weight	25011.0 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,D
Atom count atom_count	10211

QVQLVQSGAEVKKPGASVKVSCKASGYTFTDYFLHWVRQAPGQGLEWMGWINPDSGGTNYAQRFQGRVTMTRDTSISTAYMEVSRLRSDDTAVYYCARDNERYQMQNYYHYYGMDVWGQGTTVTVVSRRLPPSVFPLAPSSKSTSGGTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKS

Source Source

Source organism organism	Homo sapiens
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Homo sapiens

Entity 2 Entity 2 polymer

Description description	Neutralizing antibody CC25.4 light chain
Molecular weight formula_weight	22815.1 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,E

QSVLTQPPSASGTPGQRVTISCSGSSSNIGSNTVNWYQQLPGTAPKLLIYSNNQRPSGVPDRFSGSKSGTSASLAISGLQSEDEADYYCAAWDDSLNGYVVFGGGTKLTVLGQPKAAPSVTLFPPSSEELQANKATLVCLISDFYPGAVTVAWKADSSPVKAGVETTTPSKQSNNKYAASSYLSLTPEQWKSHRSYSCQVTHEGSTVEKTVAPTECS

Source Source

Source organism organism	Homo sapiens
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Homo sapiens

Entity 3 Entity 3 polymer

Description description	;Spike protein S2' ;
Molecular weight formula_weight	22185.0 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,F

TNLCPFHEVFNATTFASVYAWNRKRISNCVADYSVIYNFAPFFAFKCYGVSPTKLNDLCFTNVYADSFVIRGNEVSQIAPGQTGNIADYNYKLPDDFTGCVIAWNSNKLDSTPSGNYNYRYRLFRKSKLKPFERDISTEIYQAGNKPCNGVAGPNCYSPLQSYGFRPTYGVGHQPYRVVVLSFELLHAPATVCGPKK

Source Source

Source organism organism	Severe acute respiratory syndrome coronavirus 2
NCBI taxonomy ID ncbi_taxonomy_id	2697049
Host organism host_organism	Spodoptera frugiperda

Entity 4 Entity 4 branched

Description description	alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose
Molecular weight formula_weight	367.3 kDa
Source method src_method	man
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	1,2-ETHANEDIOL
Molecular weight formula_weight	62.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	302

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Unit-cell length a length_a	81.352 Å
Unit-cell length b length_b	124.901 Å
Unit-cell length c length_c	85.740 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	104.37 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	monoclinic

Resolution resolution	2.490 Å
Low-resolution limit resolution_low	41.200 Å
R factor r_factor	0.2073
R_work r_work	0.2049
R_free r_free	0.2551

Crystal structure of SARS-CoV-2 ConSp RBD in complex with neutralizing antibody CC25.4 Fab

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

;Spike protein S2' ;

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

8yub__assembly_1__model_1

8yub__assembly_1__model_1 | I(q)

8yub__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 (6)

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 branched

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

7. Citations (1)

Crystal structure of SARS-CoV-2 ConSp RBD in complex with neutralizing antibody CC25.4 Fab

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

;Spike protein S2' ;

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

8yub__assembly_1__model_1

8yub__assembly_1__model_1 | I(q)

8yub__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 (6)

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 branched

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

7. Citations (1)