SAXSdb — 3f8x

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

putative delta-5-3-ketosteroid isomerase

Pectobacterium atrosepticum SCRI1043

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
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	Q6D504_ERWCT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–148； UniProt 1–147 Author chain B； PDBConstruct 2–148； UniProt 1–147 Author chain C； PDBConstruct 2–148； UniProt 1–147 Author chain D； PDBConstruct 2–148； UniProt 1–147

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	3f8x
Deposition date deposition_date	2008-11-13
Structure title title	Crystal structure of a putative delta-5-3-ketosteroid isomerase (eca2236) from pectobacterium atrosepticum scri1043 at 1.55 A resolution
Keywords keywords	Structural genomics, Joint Center for Structural Genomics, JCSG, Protein Structure Initiative, PSI-2, 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.

3f8x__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3f8x__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3f8x__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	19.74 Å
Rg (electron density)	18.40 Å
Total Rg	19.27 Å
Atom count	2028
Residues	255
Excluded volume	36237 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3f8x__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3f8x__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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	3f8xA00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily	50 —

Domain ID domain_id	3f8xB00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily	50 —

Domain ID domain_id	3f8xC00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily	50 —

Domain ID domain_id	3f8xD00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily	50 —

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Unit-cell length a length_a	50.780 Å
Unit-cell length b length_b	51.600 Å
Unit-cell length c length_c	66.310 Å
Unit-cell angle α angle_alpha	79.41 °
Unit-cell angle β angle_beta	79.74 °
Unit-cell angle γ angle_gamma	61.89 °
Molecules per unit cell Z z_pdb	4

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

Resolution resolution	1.550 Å
Low-resolution limit resolution_low	25.310 Å
R factor r_factor	0.1597
R_work r_work	0.1582
R_free r_free	0.1881

Description description	putative delta-5-3-ketosteroid isomerase
Molecular weight formula_weight	16550.9 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	5096

Crystal structure of a putative delta-5-3-ketosteroid isomerase (eca2236) from pectobacterium atrosepticum scri1043 at 1.55 A resolution

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

putative delta-5-3-ketosteroid isomerase

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

3f8x__assembly_2__model_1

3f8x__assembly_2__model_1 | I(q)

3f8x__assembly_2__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	Pectobacterium atrosepticum SCRI1043
Common name common_name	Erwinia carotovora subsp. atroseptica SCRI1043
NCBI taxonomy ID ncbi_taxonomy_id	218491
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	789

Crystal structure of a putative delta-5-3-ketosteroid isomerase (eca2236) from pectobacterium atrosepticum scri1043 at 1.55 A resolution

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

putative delta-5-3-ketosteroid isomerase

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

3f8x__assembly_2__model_1

3f8x__assembly_2__model_1 | I(q)

3f8x__assembly_2__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)