SAXSdb — 1t4o

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

Ribonuclease III

Saccharomyces cerevisiae

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	RNT1_YEAST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–111； UniProt 362–471 Author chain B； PDBConstruct 2–111； UniProt 362–471

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	1t4o
Deposition date deposition_date	2004-04-30
Structure title title	Crystal structure of rnt1p dsRBD
Keywords keywords	Rnt1p, dsRBD, RNA-binding, 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.

1t4o__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1t4o__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1t4o__assembly_2__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)	14.03 Å
Total Rg	15.28 Å
Atom count	677
Residues	87
Excluded volume	12276 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1t4o__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1t4o__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) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1t4oa_
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	d1t4ob_
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)

CATH v4.4 (2 domains)

Domain ID domain_id	1t4oA00
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	1t4oB00
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	73.815 Å
Unit-cell length b length_b	68.312 Å
Unit-cell length c length_c	57.178 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	121.91 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

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

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	48.800 Å
R factor r_factor	0.2058
R_work r_work	0.1978
R_free r_free	0.2764

Description description	Ribonuclease III
Molecular weight formula_weight	13207.3 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	1335

Crystal structure of rnt1p dsRBD

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

1t4o__assembly_2__model_1

1t4o__assembly_2__model_1 | I(q)

1t4o__assembly_2__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	4932
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	33

Crystal structure of rnt1p dsRBD

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

1t4o__assembly_2__model_1

1t4o__assembly_2__model_1 | I(q)

1t4o__assembly_2__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)