SAXSdb — 2p4b

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

Sigma-E factor regulatory protein rseB

Escherichia coli K12

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	octyl beta-D-glucopyranoside × 1 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RSEB_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–295； UniProt 24–318 Author chain B； PDBConstruct 1–295； UniProt 24–318 Author chain C； PDBConstruct 1–295； UniProt 24–318

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	2p4b
Deposition date deposition_date	2007-03-12
Structure title title	Crystal structure of E.coli RseB
Keywords keywords	Open and closed form, SIGNALING PROTEIN; SIGNALING PROTEIN
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.

2p4b__assembly_1__model_1

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

Download this curve (.dat)

2p4b__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2p4b__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.09 Å
Rg (electron density)	27.49 Å
Total Rg	28.25 Å
Atom count	4383
Residues	544
Excluded volume	77830 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2p4b__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2p4b__assembly_2__model_1`	dimeric （2）	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	Sigma-E factor regulatory protein rseB
Molecular weight formula_weight	33328.8 kDa
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	6792

TPASGALLQQMNLASQSLNYELSFISINKQGVESLRYRHARLDNRPLAQLLQMDGPRREVVQRGNEISYFEPGLEPFTLNGDYIVDSLPSLIYTDFKRLSPYYDFISVGRTRIADRLCEVIRVVARDGTRYSYIVWMDTESKLPMRVDLLDRDGETLEQFRVIAFNVNQDISSSMQTLAKANLPPLLSVPVGEKAKFSWTPTWLPQGFSEVSSSRRPLPTMDNMPIESRLYSDGLFSFSVNVNRATPSSTDQMLRTGRRTVSTSVRDNAEITIVGELPPQTAKRIAENIKFGAAQ

Source Source

Source organism organism	Escherichia coli K12
NCBI taxonomy ID ncbi_taxonomy_id	83333
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	octyl beta-D-glucopyranoside
Molecular weight formula_weight	292.4 kDa
Source method src_method	man
Copy count entity_count	1

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	325

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	2p4bA01
Class class	2 — Mainly Beta
Architecture architecture	50 — Clam
Topology topology	20 — outer membrane lipoprotein receptor (LolB), chain A
Homologous superfamily homologous superfamily	10 — Lipoprotein localisation LolA/LolB/LppX

Domain ID domain_id	2p4bB01
Class class	2 — Mainly Beta
Architecture architecture	50 — Clam
Topology topology	20 — outer membrane lipoprotein receptor (LolB), chain A
Homologous superfamily homologous superfamily	10 — Lipoprotein localisation LolA/LolB/LppX

Domain ID domain_id	2p4bB02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	200 — Phosphorylase Kinase; domain 1
Homologous superfamily homologous superfamily	100 — MucB/RseB, C-terminal domain

Domain ID domain_id	2p4bC01
Class class	2 — Mainly Beta
Architecture architecture	50 — Clam
Topology topology	20 — outer membrane lipoprotein receptor (LolB), chain A
Homologous superfamily homologous superfamily	10 — Lipoprotein localisation LolA/LolB/LppX

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Unit-cell length a length_a	97.683 Å
Unit-cell length b length_b	197.681 Å
Unit-cell length c length_c	108.951 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	24

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	19.940 Å
R factor r_factor	0.2330
R_work r_work	0.2330
R_free r_free	0.2830

Crystal structure of E.coli RseB

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

Sigma-E factor regulatory protein rseB

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

2p4b__assembly_1__model_1

2p4b__assembly_1__model_1 | I(q)

2p4b__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

Crystal structure of E.coli RseB

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

Sigma-E factor regulatory protein rseB

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

2p4b__assembly_1__model_1

2p4b__assembly_1__model_1 | I(q)

2p4b__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)