SAXSdb — 3epv

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

Nickel and cobalt resistance protein cnrR

Ralstonia metallidurans

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	COPPER (II) ION × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	COPPER (II) ION × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CNRR_RALME
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–109； UniProt 40–148 Author chain B； PDBConstruct 1–109； UniProt 40–148 Author chain C； PDBConstruct 1–109； UniProt 40–148 Author chain D； PDBConstruct 1–109； UniProt 40–148

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	3epv
Deposition date deposition_date	2008-09-30
Structure title title	X-ray Structure of the Metal-sensor CnrX in both the Apo- and Copper-bound Forms
Keywords keywords	all alpha helix, Cobalt, Nickel, METAL BINDING PROTEIN; METAL BINDING PROTEIN
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.

3epv__assembly_2__model_1

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

Download this curve (.dat)

3epv__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3epv__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	21.29 Å
Rg (electron density)	20.74 Å
Total Rg	21.46 Å
Atom count	1721
Residues	213
Excluded volume	30218 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3epv__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3epv__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 (3)

Entity 1 Entity 1 polymer

Description description	Nickel and cobalt resistance protein cnrR
Molecular weight formula_weight	12409.8 kDa
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	3986

DLHEILHEAVPLDANEREILELKEDAFAQRRREIETRLRAANGKLADAIAKNPAWSPEVEAATQEVERAAGDLQRATLVHVFEMRAGLKPEHRPAYDRVLIDALRRGSQ

Source Source

Source organism organism	Ralstonia metallidurans
NCBI taxonomy ID ncbi_taxonomy_id	266264
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	COPPER (II) ION
Molecular weight formula_weight	63.5 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	441

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	3epvA00
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	1490 —

Domain ID domain_id	3epvB00
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	1490 —

Domain ID domain_id	3epvC00
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	1490 —

Domain ID domain_id	3epvD00
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	1490 —

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Unit-cell length a length_a	31.940 Å
Unit-cell length b length_b	77.890 Å
Unit-cell length c length_c	93.200 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.17 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

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

Resolution resolution	1.742 Å
Low-resolution limit resolution_low	40.000 Å
R factor r_factor	0.1989
R_work r_work	0.1957
R_free r_free	0.2589

X-ray Structure of the Metal-sensor CnrX in both the Apo- and Copper-bound Forms

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

Nickel and cobalt resistance protein cnrR

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

3epv__assembly_2__model_1

3epv__assembly_2__model_1 | I(q)

3epv__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

X-ray Structure of the Metal-sensor CnrX in both the Apo- and Copper-bound Forms

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

Nickel and cobalt resistance protein cnrR

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

3epv__assembly_2__model_1

3epv__assembly_2__model_1 | I(q)

3epv__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)