SAXSdb — 2pr6

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

Blue-light photoreceptor

Bacillus subtilis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	FLAVIN MONONUCLEOTIDE × 2 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 4	FLAVIN MONONUCLEOTIDE × 4 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PHOT_BACSU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 5–132； UniProt 20–147 Author chain B； PDBConstruct 5–132； UniProt 20–147

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	2pr6
Deposition date deposition_date	2007-05-03
Structure title title	Structural Basis for Light-dependent Signaling in the Dimeric LOV Photosensor YtvA (Light Structure)
Keywords keywords	light-oxygen-voltage, LOV, Per-Arnt-Sim, PAS, FLAVOPROTEIN, SIGNALING PROTEIN; FLAVOPROTEIN, SIGNALING 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.

2pr6__assembly_1__model_1

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

Download this curve (.dat)

2pr6__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2pr6__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.53 Å
Rg (electron density)	19.54 Å
Total Rg	20.46 Å
Atom count	2108
Residues	253
Excluded volume	37307 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2pr6__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2pr6__assembly_2__model_1`	tetrameric （4）	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	Blue-light photoreceptor
Molecular weight formula_weight	15119.9 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	2419

GSHMLDHVRVGVVITDPALEDNPIVYVNQGFVQMTGYETEEILGKNCRFLQGKHTDPAEVDNIRTALQNKEPVTVQIQNYKKDGTMFWNELNIDPMEIEDKTYFVGIQNDITKQKEYEKLLEDSLTEITALS

Source Source

Source organism organism	Bacillus subtilis
NCBI taxonomy ID ncbi_taxonomy_id	1423
Host organism host_organism	Escherichia coli BL21

Entity 2 Entity 2 non-polymer

Description description	FLAVIN MONONUCLEOTIDE
Molecular weight formula_weight	456.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	311

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2pr6a_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.110 — Profilin-like
Superfamily Superfamily superfamily	d.110.3 — PYP-like sensor domain (PAS domain)
Family Family family	d.110.3.0 — automated matches

Domain ID domain_id	d2pr6b_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.110 — Profilin-like
Superfamily Superfamily superfamily	d.110.3 — PYP-like sensor domain (PAS domain)
Family Family family	d.110.3.0 — automated matches

CATH v4.4 (2 domains)

Domain ID domain_id	2pr6A00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	450 — Beta-Lactamase
Homologous superfamily homologous superfamily	20 — PAS domain

Domain ID domain_id	2pr6B00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	450 — Beta-Lactamase
Homologous superfamily homologous superfamily	20 — PAS domain

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Unit-cell length a length_a	90.295 Å
Unit-cell length b length_b	91.678 Å
Unit-cell length c length_c	34.380 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	1.950 Å
Low-resolution limit resolution_low	14.850 Å
R factor r_factor	0.1840
R_work r_work	0.1810
R_free r_free	0.2280

Structural Basis for Light-dependent Signaling in the Dimeric LOV Photosensor YtvA (Light Structure)

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

Blue-light photoreceptor

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

2pr6__assembly_1__model_1

2pr6__assembly_1__model_1 | I(q)

2pr6__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 (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

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Structural Basis for Light-dependent Signaling in the Dimeric LOV Photosensor YtvA (Light Structure)

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

Blue-light photoreceptor

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

2pr6__assembly_1__model_1

2pr6__assembly_1__model_1 | I(q)

2pr6__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 (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

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)