SAXSdb — 3cyp

▼

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

Chemotaxis protein motB

Helicobacter pylori

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 4	water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MOTB_HELPY
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain B； PDBConstruct 7–138； UniProt 126–257 Author chain C； PDBConstruct 7–138； UniProt 126–257 Author chain D； PDBConstruct 7–138； UniProt 126–257 Author chain E； PDBConstruct 7–138； UniProt 126–257

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	3cyp
Deposition date deposition_date	2008-04-26
Structure title title	The crystal structure of the C-terminal domain of Helicobacter pylori MotB (residues 125-256).
Keywords keywords	;Helicobacter pylori, bacterial flagellar motor, peptidoglycan binding, Bacterial flagellum, Chemotaxis, Flagellar rotation, Inner membrane, Membrane, Transmembrane, MEMBRANE PROTEIN ;; MEMBRANE PROTEIN
Experimental Method method	X-RAY DIFFRACTION

▼

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.

3cyp__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3cyp__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3cyp__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	21.15 Å
Rg (electron density)	19.97 Å
Total Rg	20.85 Å
Atom count	2128
Residues	264
Excluded volume	37675 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3cyp__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3cyp__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`3cyp__assembly_3__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (2)

▼

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	3cypB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1330 — 60s Ribosomal Protein L30; Chain: A;
Homologous superfamily homologous superfamily	60 — OmpA-like domain

Domain ID domain_id	3cypC00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1330 — 60s Ribosomal Protein L30; Chain: A;
Homologous superfamily homologous superfamily	60 — OmpA-like domain

Domain ID domain_id	3cypD00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1330 — 60s Ribosomal Protein L30; Chain: A;
Homologous superfamily homologous superfamily	60 — OmpA-like domain

Domain ID domain_id	3cypE00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1330 — 60s Ribosomal Protein L30; Chain: A;
Homologous superfamily homologous superfamily	60 — OmpA-like domain

▶

Unit-cell length a length_a	50.816 Å
Unit-cell length b length_b	89.479 Å
Unit-cell length c length_c	66.322 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	112.55 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

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

Resolution resolution	1.600 Å
Low-resolution limit resolution_low	50.572 Å
R factor r_factor	0.1880
R_work r_work	0.1850
R_free r_free	0.2270

Description description	Chemotaxis protein motB
Molecular weight formula_weight	15940.0 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,C,D,E
Atom count atom_count	4968

The crystal structure of the C-terminal domain of Helicobacter pylori MotB (residues 125-256).

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

Chemotaxis protein motB

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

3cyp__assembly_2__model_1

3cyp__assembly_2__model_1 | I(q)

3cyp__assembly_2__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	Helicobacter pylori
Common name common_name	Campylobacter pylori
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	611

The crystal structure of the C-terminal domain of Helicobacter pylori MotB (residues 125-256).

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

Chemotaxis protein motB

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

3cyp__assembly_2__model_1

3cyp__assembly_2__model_1 | I(q)

3cyp__assembly_2__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)