SAXSdb — 3cex

▼

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

Uncharacterized protein

Enterococcus faecalis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	ACETIC ACID × 2 GLYCEROL × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	ACETIC ACID × 2 GLYCEROL × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q82ZN0_ENTFA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–172； UniProt 1–169 Author chain B； PDBConstruct 4–172； UniProt 1–169

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	3cex
Deposition date deposition_date	2008-02-29
Structure title title	Crystal structure of the conserved protein of locus EF_3021 from Enterococcus faecalis
Keywords keywords	;Enterococcus faecalis, structural genomics, EF_3021, PSI-2, Protein Structure Initiative, Midwest Center for Structural Genomics, MCSG, UNKNOWN FUNCTION ;; STRUCTURAL GENOMICS, 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.

3cex__assembly_1__model_1

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

Download this curve (.dat)

3cex__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3cex__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.21 Å
Rg (electron density)	20.35 Å
Total Rg	21.07 Å
Atom count	2742
Residues	330
Excluded volume	48882 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3cex__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3cex__assembly_2__model_1`	dimeric （2）	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 protein
Molecular weight formula_weight	19788.5 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	2970

SNAMKVTQLSSETLDRAHERFEETLAQMTVAEANTMPAPLIKSVTWLMWHTARELDLQISALNHSDPLWLSQHWTEKFALDLPDETEDWHHTPEEAAKVVVAEKQLLSDYLAASVALTKSYLDQIKEEQLSDVIDKNWTPPVTRQVRLVSAIDDAVMHSGQAVYTRRLVIGK

Source Source

Source organism organism	Enterococcus faecalis
NCBI taxonomy ID ncbi_taxonomy_id	226185
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	ACETIC ACID
Molecular weight formula_weight	60.1 kDa
Source method src_method	syn
Copy count entity_count	2

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	2

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	188

▼

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	3cexA00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily	450 — dinb family like domain

Domain ID domain_id	3cexB00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily	450 — dinb family like domain

▶

Unit-cell length a length_a	55.191 Å
Unit-cell length b length_b	55.137 Å
Unit-cell length c length_c	62.429 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	108.20 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 2 1
Space-group number int_tables_number	3
Crystal system crystal_system	—

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	35.900 Å
R factor r_factor	0.1640
R_work r_work	0.1620
R_free r_free	0.2050

Crystal structure of the conserved protein of locus EF_3021 from Enterococcus faecalis

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

Uncharacterized protein

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

3cex__assembly_1__model_1

3cex__assembly_1__model_1 | I(q)

3cex__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 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

Crystal structure of the conserved protein of locus EF_3021 from Enterococcus faecalis

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

Uncharacterized protein

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

3cex__assembly_1__model_1

3cex__assembly_1__model_1 | I(q)

3cex__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 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)