SAXSdb — 1rq0

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

Peptide chain release factor 1

Thermotoga maritima

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RF1_THEMA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–342； UniProt 1–342 Author chain B； PDBConstruct 1–342； UniProt 1–342 Author chain C； PDBConstruct 1–342； UniProt 1–342

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	1rq0
Deposition date deposition_date	2003-12-03
Structure title title	Crystal structure of peptide releasing factor 1
Keywords keywords	;crystal, peptide release factor 1, ribosome, Structural Genomics, BSGC structure funded by NIH, Protein Structure Initiative, PSI, Berkeley Structural Genomics Center ;; peptide release factor 1
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.

1rq0__assembly_1__model_1

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

Download this curve (.dat)

1rq0__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1rq0__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	37.66 Å
Rg (electron density)	37.23 Å
Total Rg	37.78 Å
Atom count	7798
Residues	947
Excluded volume	138380 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1rq0__assembly_1__model_1`	trimeric （3）	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) 12 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1rq0a_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.38 — Release factor
Superfamily Superfamily superfamily	e.38.1 — Release factor
Family Family family	e.38.1.1 — Release factor

Domain ID domain_id	d1rq0b_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.38 — Release factor
Superfamily Superfamily superfamily	e.38.1 — Release factor
Family Family family	e.38.1.1 — Release factor

Domain ID domain_id	d1rq0c_
Class class	e — Multi-domain proteins (alpha and beta)
Fold Fold fold	e.38 — Release factor
Superfamily Superfamily superfamily	e.38.1 — Release factor
Family Family family	e.38.1.1 — Release factor

CATH v4.4 (9 domains)

Domain ID domain_id	1rq0A01
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	140 — Helix Hairpins
Homologous superfamily homologous superfamily	160 —

Domain ID domain_id	1rq0A02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1660 —

Domain ID domain_id	1rq0A03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	160 — Double Stranded RNA Binding Domain
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1rq0B01
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	140 — Helix Hairpins
Homologous superfamily homologous superfamily	160 —

Domain ID domain_id	1rq0B02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1660 —

Domain ID domain_id	1rq0B03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	160 — Double Stranded RNA Binding Domain
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	1rq0C01
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	140 — Helix Hairpins
Homologous superfamily homologous superfamily	160 —

Domain ID domain_id	1rq0C02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	1660 —

Domain ID domain_id	1rq0C03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	160 — Double Stranded RNA Binding Domain
Homologous superfamily homologous superfamily	20 —

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Unit-cell length a length_a	51.900 Å
Unit-cell length b length_b	137.230 Å
Unit-cell length c length_c	80.930 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	106.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	6

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

Resolution resolution	2.650 Å
Low-resolution limit resolution_low	19.890 Å
R factor r_factor	0.2160
R_work r_work	0.2160
R_free r_free	0.2940

Description description	Peptide chain release factor 1
Molecular weight formula_weight	39715.8 kDa
Source method src_method	man
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	8002

Crystal structure of peptide releasing factor 1

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

Peptide chain release factor 1

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

1rq0__assembly_1__model_1

1rq0__assembly_1__model_1 | I(q)

1rq0__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) 12 domains

SCOP 2.08 (3 domains)

CATH v4.4 (9 domains)

7. Citations (1)

Source organism organism	Thermotoga maritima
NCBI taxonomy ID ncbi_taxonomy_id	2336
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	204

Crystal structure of peptide releasing factor 1

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

Peptide chain release factor 1

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

1rq0__assembly_1__model_1

1rq0__assembly_1__model_1 | I(q)

1rq0__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) 12 domains

SCOP 2.08 (3 domains)

CATH v4.4 (9 domains)

7. Citations (1)