SAXSdb — 9mr1

▼

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	Protein heterocomplex	Heteromer	Protein 3	R125-61 Fab Heavy chain × 1 R125-61 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	3
Chains and sequence ranges	Author chain C； PDBConstruct 1–464； UniProt 698–1161

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	9mr1
Deposition date deposition_date	2025-01-06
Last revision last_revision	2025-11-26
Structure title title	SARS-CoV-2 S2 monomer in complex with R125-61 Fab
Keywords keywords	SARS-CoV-2, Spike, S2, COVID, monoclonal antibody, complex, Viral protein, Viral protein-immune system complex, VIRUS; VIRUS
Experimental Method method	ELECTRON MICROSCOPY

▼

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.

9mr1__assembly_1__model_1

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

Download this curve (.dat)

9mr1__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9mr1__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	32.53 Å
Rg (electron density)	33.02 Å
Total Rg	33.43 Å
Atom count	3762
Residues	483
Excluded volume	67109 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9mr1__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Description description	R125-61 Fab Heavy chain
Molecular weight formula_weight	12877.3 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	3762

QVQLQESGPGLVKPSETLSLICTVSGGSITRDFWSWVRQPPGKGLEWIGYGYYRGSTNYNPSLESRVTISVDTSKNQFSLKLTSVTAADTAVYYCARETAHNWIDTWGQGILVTVSS

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 2 Entity 2 polymer

Description description	R125-61 Fab Light chain
Molecular weight formula_weight	12576.0 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

DIVMTQSPESLALSLGERATINCKSSQTVSFTSNNKNYLAWYQQKPRQPPKLLFYWASTRHSGVPDRFSGSGSGTDFTLTINSLQAEDVAVYFCHQYFSTPWTFGQGTKVEI

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	Spike protein S2
Molecular weight formula_weight	52069.8 kDa
Mutation mutation	F817P, G880C, F888C, A892P, A899P, A942P, T912P, K986P, V987P, T1117C, D1139C
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

SLGAENSVAYSNNSIAIPTNFTISVTTEILPVSMTKTSVDCTMYICGDSTECSNLLLQYGSFCTQLNRALTGIAVEQDKNTQEVFAQVKQIYKTPPIKDFGGFNFSQILPDPSKPSKRSPIEDLLFNKVTLADAGFIKQYGDCLGDIAARDLICAQKFNGLTVLPPLLTDEMIAQYTSALLACTITSGWTCGAGPALQIPFPMQMAYRFNGIGVPQNVLYENQKLIANQFNSAIGKIQDSLSSTPSALGKLQDVVNQNAQALNTLVKQLSSNFGAISSVLNDILSRLDPPEAEVQIDRLITGRLQSLQTYVTQQLIRAAEIRASANLAATKMSECVLGQSKRVDFCGKGYHLMSFPQSAPHGVVFLHVTYVPAQEKNFTTAPAICHDGKAHFPREGVFVSNGTHWFVTQRNFYEPQIITCDNTFVSGNCDVVIGIVNNTVYCPLQPELDSFKEELDKYFKNHTSGSHHHHHHHH

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 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	1

▶

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	triclinic

Resolution resolution	3.59 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	199418

SARS-CoV-2 S2 monomer in complex with R125-61 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

9mr1__assembly_1__model_1

9mr1__assembly_1__model_1 | I(q)

9mr1__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 (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 (1)

SARS-CoV-2 S2 monomer in complex with R125-61 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

9mr1__assembly_1__model_1

9mr1__assembly_1__model_1 | I(q)

9mr1__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 (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 (1)