SAXSdb — 1ep0

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

DTDP-6-DEOXY-D-XYLO-4-HEXULOSE 3,5-EPIMERASE

Methanothermobacter thermautotrophicus

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	O27818_METTH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–185； UniProt 1–185

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	1ep0
Deposition date deposition_date	2000-03-24
Structure title title	HIGH RESOLUTION CRYSTAL STRUCTURE OF DTDP-6-DEOXY-D-XYLO-4-HEXULOSE 3,5-EPIMERASE FROM METHANOBACTERIUM THERMOAUTOTROPHICUM
Keywords keywords	;racemase, dTDP-4-dehydrorhamnose epimerase, Structural Genomics, PSI, Protein Structure Initiative, Northeast Structural Genomics Consortium, NESG, ISOMERASE ;; ISOMERASE
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.

1ep0__assembly_1__model_1

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

Download this curve (.dat)

1ep0__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ep0__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	22.66 Å
Rg (electron density)	21.77 Å
Total Rg	22.59 Å
Atom count	3036
Residues	366
Excluded volume	53562 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ep0__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) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d1ep0a_
Class class	b — All beta proteins
Fold Fold fold	b.82 — Double-stranded beta-helix
Superfamily Superfamily superfamily	b.82.1 — RmlC-like cupins
Family Family family	b.82.1.1 — dTDP-sugar isomerase

CATH v4.4 (1 domains)

Domain ID domain_id	1ep0A00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	10 — Jelly Rolls

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Unit-cell length a length_a	67.720 Å
Unit-cell length b length_b	53.131 Å
Unit-cell length c length_c	51.667 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	96.61 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	1.500 Å
Low-resolution limit resolution_low	25.660 Å
R factor r_factor	0.1830
R_work r_work	0.1830
R_free r_free	0.2100

Description description	DTDP-6-DEOXY-D-XYLO-4-HEXULOSE 3,5-EPIMERASE
Molecular weight formula_weight	21702.3 kDa
EC 编号 ec_number	5.1.3.13
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1644

HIGH RESOLUTION CRYSTAL STRUCTURE OF DTDP-6-DEOXY-D-XYLO-4-HEXULOSE 3,5-EPIMERASE FROM METHANOBACTERIUM THERMOAUTOTROPHICUM

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

DTDP-6-DEOXY-D-XYLO-4-HEXULOSE 3,5-EPIMERASE

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

1ep0__assembly_1__model_1

1ep0__assembly_1__model_1 | I(q)

1ep0__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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Source organism organism	Methanothermobacter thermautotrophicus
NCBI taxonomy ID ncbi_taxonomy_id	145262
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	126

HIGH RESOLUTION CRYSTAL STRUCTURE OF DTDP-6-DEOXY-D-XYLO-4-HEXULOSE 3,5-EPIMERASE FROM METHANOBACTERIUM THERMOAUTOTROPHICUM

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

DTDP-6-DEOXY-D-XYLO-4-HEXULOSE 3,5-EPIMERASE

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

1ep0__assembly_1__model_1

1ep0__assembly_1__model_1 | I(q)

1ep0__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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)