SAXSdb — 1i6u

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

30S RIBOSOMAL PROTEIN S8P

Methanocaldococcus jannaschii

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Monomer	Protein 1 RNA 1	16S RRNA FRAGMENT × 1 SULFATE ION × 1 water × 2	Consistent with all polymers
2	Protein–RNA	Monomer	Protein 1 RNA 1	16S RRNA FRAGMENT × 1 SULFATE ION × 3 water × 2	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS8_METJA
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain A； PDBConstruct 1–130； UniProt 1–130 Author chain B； PDBConstruct 1–130； UniProt 1–130

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	1i6u
Deposition date deposition_date	2001-03-05
Structure title title	RNA-PROTEIN INTERACTIONS: THE CRYSTAL STRUCTURE OF RIBOSOMAL PROTEIN S8/RRNA COMPLEX FROM METHANOCOCCUS JANNASCHII
Keywords keywords	protein-RNA interactions, ribosome, ribosomal protein S8, RNA; RIBOSOME
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.

1i6u__assembly_2__model_1

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

Download this curve (.dat)

1i6u__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1i6u__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	19.92 Å
Rg (electron density)	19.02 Å
Total Rg	19.79 Å
Atom count	1812
Residues	162
Excluded volume	29669 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1i6u__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1i6u__assembly_2__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 (4)

Entity 1 Entity 1 polymer

Description description	16S RRNA FRAGMENT
Molecular weight formula_weight	11894.1 kDa
Source method src_method	syn
Copy count entity_count	2

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	C,D
Atom count atom_count	3843

GGGCCCGGUAAGUCUCUUCGGAGAUACUGCCGGGCCC

Entity 2 Entity 2 polymer

Description description	30S RIBOSOMAL PROTEIN S8P
Molecular weight formula_weight	14744.1 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B

MSLMDPLANALNHISNCERVGKKVVYIKPASKLIGRVLKVMQDNGYIGEFEFIEDGRAGIFKVELIGKINKCGAIKPRFPVKKFGYEKFEKRYLPARDFGILIVSTTQGVMSHEEAKKRGLGGRLLAYVY

Source Source

Source organism organism	Methanocaldococcus jannaschii
NCBI taxonomy ID ncbi_taxonomy_id	2190
Host organism host_organism	Escherichia coli

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	215

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1i6ua_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.140 — Ribosomal protein S8
Superfamily Superfamily superfamily	d.140.1 — Ribosomal protein S8
Family Family family	d.140.1.1 — Ribosomal protein S8

Domain ID domain_id	d1i6ub_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.140 — Ribosomal protein S8
Superfamily Superfamily superfamily	d.140.1 — Ribosomal protein S8
Family Family family	d.140.1.1 — Ribosomal protein S8

CATH v4.4 (4 domains)

Domain ID domain_id	1i6uA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1370 — Ribosomal Protein S8; Chain: A, domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1i6uA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1i6uB01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1370 — Ribosomal Protein S8; Chain: A, domain 1
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	1i6uB02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1490 — Dna Ligase; domain 1
Homologous superfamily homologous superfamily	10 —

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Unit-cell length a length_a	121.687 Å
Unit-cell length b length_b	121.687 Å
Unit-cell length c length_c	137.975 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	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	2.600 Å
Low-resolution limit resolution_low	41.070 Å
R factor r_factor	0.2180
R_work r_work	0.2180
R_free r_free	0.2510

RNA-PROTEIN INTERACTIONS: THE CRYSTAL STRUCTURE OF RIBOSOMAL PROTEIN S8/RRNA COMPLEX FROM METHANOCOCCUS JANNASCHII

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

30S RIBOSOMAL PROTEIN S8P

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

1i6u__assembly_2__model_1

1i6u__assembly_2__model_1 | I(q)

1i6u__assembly_2__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (3)

RNA-PROTEIN INTERACTIONS: THE CRYSTAL STRUCTURE OF RIBOSOMAL PROTEIN S8/RRNA COMPLEX FROM METHANOCOCCUS JANNASCHII

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

30S RIBOSOMAL PROTEIN S8P

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

1i6u__assembly_2__model_1

1i6u__assembly_2__model_1 | I(q)

1i6u__assembly_2__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (3)