SAXSdb — 4muo

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

Uncharacterized protein YbiB

Escherichia coli

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	YBIB_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–320； UniProt 1–320 Author chain B； PDBConstruct 1–320； UniProt 1–320

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	4muo
Deposition date deposition_date	2013-09-23
Structure title title	The TrpD2 enzyme from E.coli: YbiB
Keywords keywords	PRT class III fold, intracellular, DNA BINDING PROTEIN; DNA BINDING 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.

4muo__assembly_1__model_1

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

Download this curve (.dat)

4muo__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4muo__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	31.87 Å
Rg (electron density)	32.02 Å
Total Rg	32.33 Å
Atom count	4767
Residues	619
Excluded volume	85266 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4muo__assembly_1__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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	4muoA01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	970 — Transferase, Pyrimidine Nucleoside Phosphorylase; Chain A, domain 3
Homologous superfamily homologous superfamily	10 — Transferase, Pyrimidine Nucleoside Phosphorylase; Chain C

Domain ID domain_id	4muoA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1030 — Pyrimidine Nucleoside Phosphorylase; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Nucleoside phosphorylase/phosphoribosyltransferase catalytic domain

Domain ID domain_id	4muoB01
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	970 — Transferase, Pyrimidine Nucleoside Phosphorylase; Chain A, domain 3
Homologous superfamily homologous superfamily	10 — Transferase, Pyrimidine Nucleoside Phosphorylase; Chain C

Domain ID domain_id	4muoB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1030 — Pyrimidine Nucleoside Phosphorylase; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Nucleoside phosphorylase/phosphoribosyltransferase catalytic domain

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Unit-cell length a length_a	45.460 Å
Unit-cell length b length_b	67.440 Å
Unit-cell length c length_c	105.110 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	101.38 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	1.940 Å
Low-resolution limit resolution_low	18.000 Å
R factor r_factor	0.1801
R_work r_work	0.1795
R_free r_free	0.2117

Description description	Uncharacterized protein YbiB
Molecular weight formula_weight	36165.7 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	5166

The TrpD2 enzyme from E.coli: YbiB

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

Uncharacterized protein YbiB

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

4muo__assembly_1__model_1

4muo__assembly_1__model_1 | I(q)

4muo__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 (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	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	83333
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	393

The TrpD2 enzyme from E.coli: YbiB

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

Uncharacterized protein YbiB

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

4muo__assembly_1__model_1

4muo__assembly_1__model_1 | I(q)

4muo__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 (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)