SAXSdb — 1o0w

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

Ribonuclease III

Thermotoga maritima

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RNC_THEMA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 13–252； UniProt 1–240 Author chain B； PDBConstruct 13–252； UniProt 1–240

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	1o0w
Deposition date deposition_date	2002-09-13
Structure title title	Crystal structure of Ribonuclease III (TM1102) from Thermotoga maritima at 2.0 A resolution
Keywords keywords	;TM1102, Ribonuclease III, STRUCTURAL GENOMICS, JCSG, PSI, Protein Structure Initiative, Joint Center for Structural Genomics, 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.

1o0w__assembly_1__model_1

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

Download this curve (.dat)

1o0w__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1o0w__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.13 Å
Rg (electron density)	27.33 Å
Total Rg	28.06 Å
Atom count	3851
Residues	477
Excluded volume	68817 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1o0w__assembly_1__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 (2)

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1o0wa1
Class class	a — All alpha proteins
Fold Fold fold	a.149 — RNase III domain-like
Superfamily Superfamily superfamily	a.149.1 — RNase III domain-like
Family Family family	a.149.1.1 — RNase III catalytic domain-like

Domain ID domain_id	d1o0wa2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.50 — dsRBD-like
Superfamily Superfamily superfamily	d.50.1 — dsRNA-binding domain-like
Family Family family	d.50.1.1 — Double-stranded RNA-binding domain (dsRBD)

Domain ID domain_id	d1o0wa3
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

Domain ID domain_id	d1o0wb1
Class class	a — All alpha proteins
Fold Fold fold	a.149 — RNase III domain-like
Superfamily Superfamily superfamily	a.149.1 — RNase III domain-like
Family Family family	a.149.1.1 — RNase III catalytic domain-like

Domain ID domain_id	d1o0wb2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.50 — dsRBD-like
Superfamily Superfamily superfamily	d.50.1 — dsRNA-binding domain-like
Family Family family	d.50.1.1 — Double-stranded RNA-binding domain (dsRBD)

Domain ID domain_id	d1o0wb3
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 (4 domains)

Domain ID domain_id	1o0wA01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1520 — Ribonuclease iii, N-terminal Endonuclease Domain; Chain A
Homologous superfamily homologous superfamily	10 — Ribonuclease III domain

Domain ID domain_id	1o0wA02
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	1o0wB01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1520 — Ribonuclease iii, N-terminal Endonuclease Domain; Chain A
Homologous superfamily homologous superfamily	10 — Ribonuclease III domain

Domain ID domain_id	1o0wB02
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	36.000 Å
Unit-cell length b length_b	58.500 Å
Unit-cell length c length_c	70.200 Å
Unit-cell angle α angle_alpha	67.20 °
Unit-cell angle β angle_beta	92.00 °
Unit-cell angle γ angle_gamma	77.70 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	25.000 Å
R factor r_factor	0.1950
R_work r_work	0.1950
R_free r_free	0.2300

Description description	Ribonuclease III
Molecular weight formula_weight	29033.1 kDa
EC 编号 ec_number	3.1.26.3
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4234

Crystal structure of Ribonuclease III (TM1102) from Thermotoga maritima at 2.0 A resolution

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

Ribonuclease III

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

1o0w__assembly_1__model_1

1o0w__assembly_1__model_1 | I(q)

1o0w__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) 10 domains

SCOP 2.08 (6 domains)

CATH v4.4 (4 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	383

Crystal structure of Ribonuclease III (TM1102) from Thermotoga maritima at 2.0 A resolution

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

Ribonuclease III

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

1o0w__assembly_1__model_1

1o0w__assembly_1__model_1 | I(q)

1o0w__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) 10 domains

SCOP 2.08 (6 domains)

CATH v4.4 (4 domains)

7. Citations (1)