SAXSdb — 4pk1

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

Chimera protein of Outer membrane protein assembly factors BamA and BamB

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Monomer	Protein 1	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BAMA_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 5–254； UniProt 175–424

Chimera protein of Outer membrane protein assembly factors BamA and BamB

Escherichia coli

UniProt P77774

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Monomer	Protein 1	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BAMB_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 274–645； UniProt 21–392

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	4pk1
Deposition date deposition_date	2014-05-13
Structure title title	Structure of BamB fused to a BamA POTRA domain fragment
Keywords keywords	BAM complex, fusion, PROTEIN BINDING; PROTEIN BINDING
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.

4pk1__assembly_1__model_1

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

Download this curve (.dat)

4pk1__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4pk1__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	27.52 Å
Rg (electron density)	27.21 Å
Total Rg	27.71 Å
Atom count	7451
Residues	494
Excluded volume	66496 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4pk1__assembly_1__model_1`	monomeric （1）	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 (1)

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	4pk1A01
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	310 — membrane protein fhac

Domain ID domain_id	4pk1A02
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	310 — membrane protein fhac

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Unit-cell length a length_a	49.270 Å
Unit-cell length b length_b	91.410 Å
Unit-cell length c length_c	61.210 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	92.85 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	3.100 Å
Low-resolution limit resolution_low	19.890 Å
R factor r_factor	—
R_work r_work	0.2510
R_free r_free	0.2810

Description description	Chimera protein of Outer membrane protein assembly factors BamA and BamB
Molecular weight formula_weight	70037.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	7451

Structure of BamB fused to a BamA POTRA domain fragment

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

Chimera protein of Outer membrane protein assembly factors BamA and BamB

State in the Current Structure

Other States of the Same Protein in the Database

Chimera protein of Outer membrane protein assembly factors BamA and BamB

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

4pk1__assembly_1__model_1

4pk1__assembly_1__model_1 | I(q)

4pk1__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	83333
Host organism host_organism	Escherichia coli

Structure of BamB fused to a BamA POTRA domain fragment

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

Chimera protein of Outer membrane protein assembly factors BamA and BamB

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Chimera protein of Outer membrane protein assembly factors BamA and BamB

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

4pk1__assembly_1__model_1

4pk1__assembly_1__model_1 | I(q)

4pk1__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)