2c20

CRYSTAL STRUCTURE OF UDP-GLUCOSE 4-EPIMERASE

Method: X-RAY DIFFRACTION

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

UDP-GLUCOSE 4-EPIMERASE

BACILLUS ANTHRACIS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2 ZINC ION × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2 ZINC ION × 2 water × 2	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 2	NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2 ZINC ION × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q81K34_BACAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–330； UniProt 1–330 Author chain B； PDBConstruct 1–330； UniProt 1–330 Author chain C； PDBConstruct 1–330； UniProt 1–330 Author chain D； PDBConstruct 1–330； UniProt 1–330 Author chain E； PDBConstruct 1–330； UniProt 1–330 Author chain F； PDBConstruct 1–330； UniProt 1–330

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	2c20
Deposition date deposition_date	2005-09-22
Structure title title	CRYSTAL STRUCTURE OF UDP-GLUCOSE 4-EPIMERASE
Keywords keywords	CARBOHYDRATE METABOLISM, GALACTOSE METABOLISM, ISOMERASE, NAD, SPINE; 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.

2c20__assembly_3__model_1

Assembly 3 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2c20__assembly_3__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2c20__assembly_3__model_1 | P(r) · Pending

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

Rg（Guinier）	28.53 Å
Rg (electron density)	27.75 Å
Total Rg	28.43 Å
Atom count	5272
Residues	658
Excluded volume	93013 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2c20__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2c20__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`2c20__assembly_3__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 (4)

Entity 1 Entity 1 polymer

Description description	UDP-GLUCOSE 4-EPIMERASE
Molecular weight formula_weight	36955.5 kDa
EC 编号 ec_number	5.1.3.2
Source method src_method	man
Copy count entity_count	6

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F
Atom count atom_count	16074

MNSILICGGAGYIGSHAVKKLVDEGLSVVVVDNLQTGHEDAITEGAKFYNGDLRDKAFLRDVFTQENIEAVMHFAADSLVGVSMEKPLQYYNNNVYGALCLLEVMDEFKVDKFIFSSTAATYGEVDVDLITEETMTNPTNTYGETKLAIEKMLHWYSQASNLRYKIFRYFNVAGATPNGIIGEDHRPETHLIPLVLQVALGQREKIMMFGDDYNTPDGTCIRDYIHVEDLVAAHFLGLKDLQNGGESDFYNLGNGNGFSVKEIVDAVREVTNHEIPAEVAPRRAGDPARLVASSQKAKEKLGWDPRYVNVKTIIEHAWNWHQKQPNGYEK

Source Source

Source organism organism	BACILLUS ANTHRACIS
NCBI taxonomy ID ncbi_taxonomy_id	198094
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 non-polymer

Description description	NICOTINAMIDE-ADENINE-DINUCLEOTIDE
Molecular weight formula_weight	663.4 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 3 Entity 3 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	234

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6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d2c20a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family family	c.2.1.0 — automated matches

Domain ID domain_id	d2c20b_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family family	c.2.1.0 — automated matches

Domain ID domain_id	d2c20c_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family family	c.2.1.0 — automated matches

Domain ID domain_id	d2c20d_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family family	c.2.1.0 — automated matches

Domain ID domain_id	d2c20e_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family family	c.2.1.0 — automated matches

Domain ID domain_id	d2c20f_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.2 — NAD(P)-binding Rossmann-fold domains
Superfamily Superfamily superfamily	c.2.1 — NAD(P)-binding Rossmann-fold domains
Family Family family	c.2.1.0 — automated matches

CATH v4.4 (12 domains)

Domain ID domain_id	2c20A01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	720 — NAD(P)-binding Rossmann-like Domain

Domain ID domain_id	2c20A02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	25 — UDP-galactose 4-epimerase; domain 1
Homologous superfamily homologous superfamily	10 — UDP-galactose 4-epimerase, domain 1

Domain ID domain_id	2c20B01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	720 — NAD(P)-binding Rossmann-like Domain

Domain ID domain_id	2c20B02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	25 — UDP-galactose 4-epimerase; domain 1
Homologous superfamily homologous superfamily	10 — UDP-galactose 4-epimerase, domain 1

Domain ID domain_id	2c20C01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	720 — NAD(P)-binding Rossmann-like Domain

Domain ID domain_id	2c20C02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	25 — UDP-galactose 4-epimerase; domain 1
Homologous superfamily homologous superfamily	10 — UDP-galactose 4-epimerase, domain 1

Domain ID domain_id	2c20D01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	720 — NAD(P)-binding Rossmann-like Domain

Domain ID domain_id	2c20D02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	25 — UDP-galactose 4-epimerase; domain 1
Homologous superfamily homologous superfamily	10 — UDP-galactose 4-epimerase, domain 1

Domain ID domain_id	2c20E01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	720 — NAD(P)-binding Rossmann-like Domain

Domain ID domain_id	2c20E02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	25 — UDP-galactose 4-epimerase; domain 1
Homologous superfamily homologous superfamily	10 — UDP-galactose 4-epimerase, domain 1

Domain ID domain_id	2c20F01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	720 — NAD(P)-binding Rossmann-like Domain

Domain ID domain_id	2c20F02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	25 — UDP-galactose 4-epimerase; domain 1
Homologous superfamily homologous superfamily	10 — UDP-galactose 4-epimerase, domain 1

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Unit-cell length a length_a	136.165 Å
Unit-cell length b length_b	136.165 Å
Unit-cell length c length_c	248.646 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	36

Space group space_group	P 32 1 2
Space-group number int_tables_number	153
Crystal system crystal_system	—

Resolution resolution	2.700 Å
Low-resolution limit resolution_low	25.020 Å
R factor r_factor	0.2080
R_work r_work	0.2050
R_free r_free	0.2760

CRYSTAL STRUCTURE OF UDP-GLUCOSE 4-EPIMERASE

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

UDP-GLUCOSE 4-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

2c20__assembly_3__model_1

2c20__assembly_3__model_1 | I(q)

2c20__assembly_3__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (6 domains)

CATH v4.4 (12 domains)

7. Citations (1)

CRYSTAL STRUCTURE OF UDP-GLUCOSE 4-EPIMERASE

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

UDP-GLUCOSE 4-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

2c20__assembly_3__model_1

2c20__assembly_3__model_1 | I(q)

2c20__assembly_3__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (6 domains)

CATH v4.4 (12 domains)

7. Citations (1)