SAXSdb — 2rjn

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

Response regulator receiver:Metal-dependent phosphohydrolase, HD subdomain

Neptuniibacter caesariensis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q2BKU2_9GAMM
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–146； UniProt 2–144

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	2rjn
Deposition date deposition_date	2007-10-15
Structure title title	Crystal structure of an uncharacterized protein Q2BKU2 from Neptuniibacter caesariensis
Keywords keywords	;STRUCTURAL GENOMICS, Oceanospirillum sp. MED92, Neptuniibacter caesariensis, PSI-2, PROTEIN STRUCTURE INITIATIVE, New York SGX Research Center for Structural Genomics, NYSGXRC, Hydrolase ;; HYDROLASE
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.

2rjn__assembly_1__model_1

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

Download this curve (.dat)

2rjn__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2rjn__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.96 Å
Rg (electron density)	14.53 Å
Total Rg	15.76 Å
Atom count	1078
Residues	135
Excluded volume	19426 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2rjn__assembly_1__model_1`	monomeric （1）	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) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d2rjna_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.1 — CheY-like
Family Family family	c.23.1.0 — automated matches

CATH v4.4 (1 domains)

Domain ID domain_id	2rjnA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	2300 — Response regulator

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Unit-cell length a length_a	79.474 Å
Unit-cell length b length_b	52.973 Å
Unit-cell length c length_c	55.124 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	124.96 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.100 Å
Low-resolution limit resolution_low	19.230 Å
R factor r_factor	0.1870
R_work r_work	0.1850
R_free r_free	0.2360

Description description	Response regulator receiver:Metal-dependent phosphohydrolase, HD subdomain
Molecular weight formula_weight	17657.2 kDa
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1142

Crystal structure of an uncharacterized protein Q2BKU2 from Neptuniibacter caesariensis

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

Response regulator receiver:Metal-dependent phosphohydrolase, HD subdomain

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

2rjn__assembly_1__model_1

2rjn__assembly_1__model_1 | I(q)

2rjn__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Source organism organism	Neptuniibacter caesariensis
NCBI taxonomy ID ncbi_taxonomy_id	207954
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	64

Crystal structure of an uncharacterized protein Q2BKU2 from Neptuniibacter caesariensis

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

Response regulator receiver:Metal-dependent phosphohydrolase, HD subdomain

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

2rjn__assembly_1__model_1

2rjn__assembly_1__model_1 | I(q)

2rjn__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)