SAXSdb — 1iq4

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

50S RIBOSOMAL PROTEIN L5

Geobacillus stearothermophilus

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	RL5_BACST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–179； UniProt 1–179 Author chain B； PDBConstruct 1–179； UniProt 1–179

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	1iq4
Deposition date deposition_date	2001-06-13
Structure title title	5S-RRNA BINDING RIBOSOMAL PROTEIN L5 FROM BACILLUS STEAROTHERMOPHILUS
Keywords keywords	Ribosomal protein, rRNA-binding, RNP motif, 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.

1iq4__assembly_2__model_1

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

Download this curve (.dat)

1iq4__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1iq4__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	19.33 Å
Rg (electron density)	18.25 Å
Total Rg	19.24 Å
Atom count	1413
Residues	179
Excluded volume	25617 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1iq4__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1iq4__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	d1iq4a_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.77 — RL5-like
Superfamily Superfamily superfamily	d.77.1 — RL5-like
Family Family family	d.77.1.1 — Ribosomal protein L5

Domain ID domain_id	d1iq4b_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.77 — RL5-like
Superfamily Superfamily superfamily	d.77.1 — RL5-like
Family Family family	d.77.1.1 — Ribosomal protein L5

CATH v4.4 (2 domains)

Domain ID domain_id	1iq4A00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1440 — 50s Ribosomal Protein L5; Chain: A,
Homologous superfamily homologous superfamily	10 — Ribosomal protein L5

Domain ID domain_id	1iq4B00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1440 — 50s Ribosomal Protein L5; Chain: A,
Homologous superfamily homologous superfamily	10 — Ribosomal protein L5

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Unit-cell length a length_a	138.650 Å
Unit-cell length b length_b	49.220 Å
Unit-cell length c length_c	68.930 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	117.32 °
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	1.800 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	—
R_work r_work	0.2154
R_free r_free	0.2591

Description description	50S RIBOSOMAL PROTEIN L5
Molecular weight formula_weight	20176.7 kDa
Mutation mutation	V9L, K10N, V111A, A121S
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	3202

5S-RRNA BINDING RIBOSOMAL PROTEIN L5 FROM BACILLUS STEAROTHERMOPHILUS

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

50S RIBOSOMAL PROTEIN L5

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

1iq4__assembly_2__model_1

1iq4__assembly_2__model_1 | I(q)

1iq4__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	Geobacillus stearothermophilus
NCBI taxonomy ID ncbi_taxonomy_id	1422
Host organism host_organism	Escherichia coli BL21(DE3)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	376

5S-RRNA BINDING RIBOSOMAL PROTEIN L5 FROM BACILLUS STEAROTHERMOPHILUS

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

50S RIBOSOMAL PROTEIN L5

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

1iq4__assembly_2__model_1

1iq4__assembly_2__model_1 | I(q)

1iq4__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)