1qy9

Crystal structure of E. coli Se-MET protein YDDE

Method: X-RAY DIFFRACTION

▼

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

Uncharacterized isomerase YddE

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	GLYCEROL × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	GLYCEROL × 1 water × 2	Consistent with protein count
3	Protein homooligomer	Homooligomer	Protein 4	GLYCEROL × 3 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	YDDE_ECOLI
Isoform	—
PDB entities	1, 2
Chains and sequence ranges	Author chain A； PDBConstruct 1–297； UniProt 1–297 Author chain C； PDBConstruct 1–297； UniProt 1–297 Author chain D； PDBConstruct 1–297； UniProt 1–297 Author chain B； PDBConstruct 1–297； UniProt 1–297

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1qy9
Deposition date deposition_date	2003-09-10
Structure title title	Crystal structure of E. coli Se-MET protein YDDE
Keywords keywords	PUTATIVE PHENAZINE BIOSYNTHESIS PROTEIN; EPIMERASE; ANTIBIOTIC BIOSYNTHESIS PROTEIN; STRUCTURAL GENOMICS, UNKNOWN FUNCTION; UNKNOWN FUNCTION
Experimental Method method	X-RAY DIFFRACTION

▼

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.

1qy9__assembly_1__model_1

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

Download this curve (.dat)

1qy9__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1qy9__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	27.75 Å
Rg (electron density)	26.84 Å
Total Rg	27.56 Å
Atom count	4533
Residues	579
Excluded volume	80460 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1qy9__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1qy9__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1qy9__assembly_3__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Description description	Uncharacterized isomerase YddE
Molecular weight formula_weight	32639.1 kDa
EC 编号 ec_number	5.1.-.-
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C,D
Atom count atom_count	9702

MKPQVYHVDAFTSQPFRGNSAGVVFPADNLSEAQMQLIARELGHSETAFLLHSDDSDVRIRYFTPTVEVPICGHATVAAHYVRAKVLGLGNCTIWQTSLAGKHRVTIEKHNDDYRISLEQGTPGFEPPLEGETRAAIINALHLTEDDILPGLPIQVATTGHSKVMIPLKPEVDIDALSPDLNALTAISKKIGCNGFFPFQIRPGKNETDGRMFSPAIGIVEDPVTGNANGPMGAWLVHHNVLPHDGNVLRVKGHQGRALGRDGMIEVTVTIRDNQPEKVTISGTAVILFHAEWAIEL

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Uncharacterized isomerase YddE
Molecular weight formula_weight	32655.1 kDa
EC 编号 ec_number	5.1.-.-
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

Entity 3 Entity 3 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	620

▼

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d1qy9a1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.21 — Diaminopimelate epimerase-like
Superfamily Superfamily superfamily	d.21.1 — Diaminopimelate epimerase-like
Family Family family	d.21.1.2 — PhzC/PhzF-like

Domain ID domain_id	d1qy9a2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.21 — Diaminopimelate epimerase-like
Superfamily Superfamily superfamily	d.21.1 — Diaminopimelate epimerase-like
Family Family family	d.21.1.2 — PhzC/PhzF-like

Domain ID domain_id	d1qy9b1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.21 — Diaminopimelate epimerase-like
Superfamily Superfamily superfamily	d.21.1 — Diaminopimelate epimerase-like
Family Family family	d.21.1.2 — PhzC/PhzF-like

Domain ID domain_id	d1qy9b2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.21 — Diaminopimelate epimerase-like
Superfamily Superfamily superfamily	d.21.1 — Diaminopimelate epimerase-like
Family Family family	d.21.1.2 — PhzC/PhzF-like

Domain ID domain_id	d1qy9c1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.21 — Diaminopimelate epimerase-like
Superfamily Superfamily superfamily	d.21.1 — Diaminopimelate epimerase-like
Family Family family	d.21.1.2 — PhzC/PhzF-like

Domain ID domain_id	d1qy9c2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.21 — Diaminopimelate epimerase-like
Superfamily Superfamily superfamily	d.21.1 — Diaminopimelate epimerase-like
Family Family family	d.21.1.2 — PhzC/PhzF-like

Domain ID domain_id	d1qy9d1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.21 — Diaminopimelate epimerase-like
Superfamily Superfamily superfamily	d.21.1 — Diaminopimelate epimerase-like
Family Family family	d.21.1.2 — PhzC/PhzF-like

Domain ID domain_id	d1qy9d2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.21 — Diaminopimelate epimerase-like
Superfamily Superfamily superfamily	d.21.1 — Diaminopimelate epimerase-like
Family Family family	d.21.1.2 — PhzC/PhzF-like

CATH v4.4 (8 domains)

Domain ID domain_id	1qy9A01
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	310 — Diaminopimelate Epimerase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Diaminopimelate Epimerase; Chain A, domain 1

Domain ID domain_id	1qy9A02
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	310 — Diaminopimelate Epimerase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Diaminopimelate Epimerase; Chain A, domain 1

Domain ID domain_id	1qy9B01
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	310 — Diaminopimelate Epimerase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Diaminopimelate Epimerase; Chain A, domain 1

Domain ID domain_id	1qy9B02
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	310 — Diaminopimelate Epimerase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Diaminopimelate Epimerase; Chain A, domain 1

Domain ID domain_id	1qy9C01
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	310 — Diaminopimelate Epimerase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Diaminopimelate Epimerase; Chain A, domain 1

Domain ID domain_id	1qy9C02
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	310 — Diaminopimelate Epimerase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Diaminopimelate Epimerase; Chain A, domain 1

Domain ID domain_id	1qy9D01
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	310 — Diaminopimelate Epimerase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Diaminopimelate Epimerase; Chain A, domain 1

Domain ID domain_id	1qy9D02
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	310 — Diaminopimelate Epimerase; Chain A, domain 1
Homologous superfamily homologous superfamily	10 — Diaminopimelate Epimerase; Chain A, domain 1

▶

Unit-cell length a length_a	80.035 Å
Unit-cell length b length_b	56.529 Å
Unit-cell length c length_c	148.742 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	101.67 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	6

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

Resolution resolution	2.050 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.1720
R_work r_work	0.1713
R_free r_free	0.2067

Crystal structure of E. coli Se-MET protein YDDE

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

Uncharacterized isomerase YddE

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

1qy9__assembly_1__model_1

1qy9__assembly_1__model_1 | I(q)

1qy9__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)

Crystal structure of E. coli Se-MET protein YDDE

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

Uncharacterized isomerase YddE

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

1qy9__assembly_1__model_1

1qy9__assembly_1__model_1 | I(q)

1qy9__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 (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

CATH v4.4 (8 domains)

7. Citations (1)