SAXSdb — 12qj

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

Choline binding protein E CbpE

Streptococcus pneumoniae

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	5992-2 Fab Heavy Chain × 1 5992-2 Fab Light Chain × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A0T8F9T1_STREE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–394； UniProt 28–421

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	12qj
Deposition date deposition_date	2026-04-15
Structure title title	Pneumococcal choline binding CbpE surface protein bounds to 5992-2 Fab
Keywords keywords	PNEUMOCOCCAL CHOLINE BINDING, CryoEM, HUMAN MONOCLONAL ANTIBODY, IMMUNE SYSTEM; IMMUNE SYSTEM
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.

12qj__assembly_1__model_1

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

Download this curve (.dat)

12qj__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

12qj__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	31.40 Å
Rg (electron density)	31.24 Å
Total Rg	31.95 Å
Atom count	4987
Residues	630
Excluded volume	87609 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`12qj__assembly_1__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 (3)

Entity 1 Entity 1 polymer

Description description	Choline binding protein E CbpE
Molecular weight formula_weight	45515.3 kDa
EC 编号 ec_number	3.2.1.96
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	4987

SSGNKIHFINVQEGGSDAIILESNGHFAMVDTGEDYDFPDGSDSRYPWREGIETSYKHVLTDRVFRRLKELGVQKLDFILVTHTHSDHIGNVDELLSTYPVDRVYLKKYSDNRITNSERLWDNLYGYDKVLQTASEKGVSVIQNITQGDAHFQFGDMDIQLYNYENETDSSGELKKIWDDNSNSLISVVKVNGKKIYLGGDLDNVHGAEDKYGPLIGKVDLMKFNHHHDTNKSNTKDFIKNLSPSLIVQTSDSLPWKNGVDSEYVNWLKERGIERINAASKDYDATVFDIRQDGLVNISTSYKPIPSFQAGWHKSSYGNWWYQAPDSTGEYAVGWNEIKGEWYYFNQTGILLQNQWKKWNNRWFYLTDSGVAAKNWKKIAGIWYYFNKENQMEI

Source Source

Source organism organism	Streptococcus pneumoniae
NCBI taxonomy ID ncbi_taxonomy_id	1313
Host organism host_organism	;Escherichia coli 'BL21-Gold(DE3)pLysS AG' ;

Entity 2 Entity 2 polymer

Description description	5992-2 Fab Heavy Chain
Molecular weight formula_weight	13679.2 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

QVQLQESGPRLVKVSETLSLTCSLSGHSISSGHHWAWIRQSPGRGLEWIATVDHNGRTYYNPSLRGRVILSKDTTKNSFSVQLTSVTAADTAVYYCARREAPSPGTGWYPPFGQWGQGALVTVST

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	5992-2 Fab Light Chain
Molecular weight formula_weight	11381.6 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

QSVLTQPPSLSGAPGQTVTISCTGSSSNIGAGYDVHWYRQLPGTAPTLLISVFDNRPLGVPGRISGSKSGTSASLAITGLQAEDEADYYCQSHDNMLSGSVFGGGTKLTVL

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

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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	3.350 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

Resolution resolution	3.35 Å
Resolution测定Method resolution_method	—
颗粒数 num_particles	59000

Pneumococcal choline binding CbpE surface protein bounds to 5992-2 Fab

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

Choline binding protein E CbpE

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

12qj__assembly_1__model_1

12qj__assembly_1__model_1 | I(q)

12qj__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (3)

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

7. Citations (1)

Pneumococcal choline binding CbpE surface protein bounds to 5992-2 Fab

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

Choline binding protein E CbpE

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

12qj__assembly_1__model_1

12qj__assembly_1__model_1 | I(q)

12qj__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

冷冻电镜 EM 3D

5. Entities and Polymers Entities & Polymers (3)

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

7. Citations (1)