SAXSdb — 3dlv

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

Signal recognition particle 19 kDa protein

Pyrococcus furiosus

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
2	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	SRP19_PYRFU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–100； UniProt 1–100 Author chain B； PDBConstruct 1–100； UniProt 1–100

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	3dlv
Deposition date deposition_date	2008-06-29
Structure title title	Structures of SRP54 and SRP19, the two proteins assembling the ribonucleic core of the Signal Recognition Particle from the archaeon Pyrococcus furiosus.
Keywords keywords	PROTEIN-RNA, SIGNAL RECOGNITION PARTICLE, Cytoplasm, Ribonucleoprotein, RNA-binding, RNA BINDING PROTEIN; RNA 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.

3dlv__assembly_1__model_1

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

Download this curve (.dat)

3dlv__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3dlv__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	14.78 Å
Rg (electron density)	13.40 Å
Total Rg	14.70 Å
Atom count	773
Residues	98
Excluded volume	13893 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3dlv__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3dlv__assembly_2__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) 5 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d3dlva_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.201 — SRP19
Superfamily Superfamily superfamily	d.201.1 — SRP19
Family Family family	d.201.1.0 — automated matches

Domain ID domain_id	d3dlvb1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.201 — SRP19
Superfamily Superfamily superfamily	d.201.1 — SRP19
Family Family family	d.201.1.0 — automated matches

Domain ID domain_id	d3dlvb2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (2 domains)

Domain ID domain_id	3dlvA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	56 — Phenylalanyl-tRNA Synthetase; Chain B, domain 1
Homologous superfamily homologous superfamily	30 — Signal recognition particle, SRP19-like subunit

Domain ID domain_id	3dlvB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	56 — Phenylalanyl-tRNA Synthetase; Chain B, domain 1
Homologous superfamily homologous superfamily	30 — Signal recognition particle, SRP19-like subunit

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Unit-cell length a length_a	35.316 Å
Unit-cell length b length_b	116.052 Å
Unit-cell length c length_c	84.460 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	16

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	1.870 Å
Low-resolution limit resolution_low	47.800 Å
R factor r_factor	0.2050
R_work r_work	0.1990
R_free r_free	0.2580

Description description	Signal recognition particle 19 kDa protein
Molecular weight formula_weight	12291.4 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,A
Atom count atom_count	1614

Structures of SRP54 and SRP19, the two proteins assembling the ribonucleic core of the Signal Recognition Particle from the archaeon Pyrococcus furiosus.

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

Signal recognition particle 19 kDa 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

3dlv__assembly_1__model_1

3dlv__assembly_1__model_1 | I(q)

3dlv__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) 5 domains

SCOP 2.08 (3 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Pyrococcus furiosus
NCBI taxonomy ID ncbi_taxonomy_id	2261
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	89

Structures of SRP54 and SRP19, the two proteins assembling the ribonucleic core of the Signal Recognition Particle from the archaeon Pyrococcus furiosus.

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

Signal recognition particle 19 kDa 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

3dlv__assembly_1__model_1

3dlv__assembly_1__model_1 | I(q)

3dlv__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) 5 domains

SCOP 2.08 (3 domains)

CATH v4.4 (2 domains)

7. Citations (1)