1qd7

PARTIAL MODEL FOR 30S RIBOSOMAL SUBUNIT

Method: X-RAY DIFFRACTION

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

S4 RIBOSOMAL PROTEIN

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 8 RNA 2	CENTRAL FRAGMENT OF 16 S RNA × 1 END FRAGMENT OF 16 S RNA × 1 S5 RIBOSOMAL PROTEIN × 1 （P02357） S6 RIBOSOMAL PROTEIN × 1 （P23370） S7 RIBOSOMAL PROTEIN × 1 （P17291） S8 RIBOSOMAL PROTEIN × 1 （P24319） S15 RIBOSOMAL PROTEIN × 1 （P05766） S17 RIBOSOMAL PROTEIN × 1 （P23828） S20 RIBOSOMAL PROTEIN × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS4_BACST
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain C； PDBConstruct 2–159； UniProt 41–198

S5 RIBOSOMAL PROTEIN

OrganismNot specified

UniProt P02357

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 8 RNA 2	CENTRAL FRAGMENT OF 16 S RNA × 1 END FRAGMENT OF 16 S RNA × 1 S4 RIBOSOMAL PROTEIN × 1 （P81288） S6 RIBOSOMAL PROTEIN × 1 （P23370） S7 RIBOSOMAL PROTEIN × 1 （P17291） S8 RIBOSOMAL PROTEIN × 1 （P24319） S15 RIBOSOMAL PROTEIN × 1 （P05766） S17 RIBOSOMAL PROTEIN × 1 （P23828） S20 RIBOSOMAL PROTEIN × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS5_BACST
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain D； PDBConstruct 1–145； UniProt 4–148

S6 RIBOSOMAL PROTEIN

OrganismNot specified

UniProt P23370

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 8 RNA 2	CENTRAL FRAGMENT OF 16 S RNA × 1 END FRAGMENT OF 16 S RNA × 1 S4 RIBOSOMAL PROTEIN × 1 （P81288） S5 RIBOSOMAL PROTEIN × 1 （P02357） S7 RIBOSOMAL PROTEIN × 1 （P17291） S8 RIBOSOMAL PROTEIN × 1 （P24319） S15 RIBOSOMAL PROTEIN × 1 （P05766） S17 RIBOSOMAL PROTEIN × 1 （P23828） S20 RIBOSOMAL PROTEIN × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS6_THETH
Isoform	—
PDB entities	5
Chains and sequence ranges	Author chain E； PDBConstruct 1–97； UniProt 1–97

S7 RIBOSOMAL PROTEIN

OrganismNot specified

UniProt P17291

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 8 RNA 2	CENTRAL FRAGMENT OF 16 S RNA × 1 END FRAGMENT OF 16 S RNA × 1 S4 RIBOSOMAL PROTEIN × 1 （P81288） S5 RIBOSOMAL PROTEIN × 1 （P02357） S6 RIBOSOMAL PROTEIN × 1 （P23370） S8 RIBOSOMAL PROTEIN × 1 （P24319） S15 RIBOSOMAL PROTEIN × 1 （P05766） S17 RIBOSOMAL PROTEIN × 1 （P23828） S20 RIBOSOMAL PROTEIN × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS7_THETH
Isoform	—
PDB entities	6
Chains and sequence ranges	Author chain F； PDBConstruct 1–135； UniProt 11–145

S8 RIBOSOMAL PROTEIN

OrganismNot specified

UniProt P24319

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 8 RNA 2	CENTRAL FRAGMENT OF 16 S RNA × 1 END FRAGMENT OF 16 S RNA × 1 S4 RIBOSOMAL PROTEIN × 1 （P81288） S5 RIBOSOMAL PROTEIN × 1 （P02357） S6 RIBOSOMAL PROTEIN × 1 （P23370） S7 RIBOSOMAL PROTEIN × 1 （P17291） S15 RIBOSOMAL PROTEIN × 1 （P05766） S17 RIBOSOMAL PROTEIN × 1 （P23828） S20 RIBOSOMAL PROTEIN × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS8_THETH
Isoform	—
PDB entities	7
Chains and sequence ranges	Author chain G； PDBConstruct 2–136； UniProt 3–137

S15 RIBOSOMAL PROTEIN

OrganismNot specified

UniProt P05766

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 8 RNA 2	CENTRAL FRAGMENT OF 16 S RNA × 1 END FRAGMENT OF 16 S RNA × 1 S4 RIBOSOMAL PROTEIN × 1 （P81288） S5 RIBOSOMAL PROTEIN × 1 （P02357） S6 RIBOSOMAL PROTEIN × 1 （P23370） S7 RIBOSOMAL PROTEIN × 1 （P17291） S8 RIBOSOMAL PROTEIN × 1 （P24319） S17 RIBOSOMAL PROTEIN × 1 （P23828） S20 RIBOSOMAL PROTEIN × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS15_BACST
Isoform	—
PDB entities	8
Chains and sequence ranges	Author chain H； PDBConstruct 1–85； UniProt 2–86

S17 RIBOSOMAL PROTEIN

OrganismNot specified

UniProt P23828

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–RNA	Heteromer	Protein 8 RNA 2	CENTRAL FRAGMENT OF 16 S RNA × 1 END FRAGMENT OF 16 S RNA × 1 S4 RIBOSOMAL PROTEIN × 1 （P81288） S5 RIBOSOMAL PROTEIN × 1 （P02357） S6 RIBOSOMAL PROTEIN × 1 （P23370） S7 RIBOSOMAL PROTEIN × 1 （P17291） S8 RIBOSOMAL PROTEIN × 1 （P24319） S15 RIBOSOMAL PROTEIN × 1 （P05766） S20 RIBOSOMAL PROTEIN × 1	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	RS17_BACST
Isoform	—
PDB entities	9
Chains and sequence ranges	Author chain I； PDBConstruct 1–82； UniProt 5–86

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	1qd7
Deposition date deposition_date	1999-07-09
Structure title title	PARTIAL MODEL FOR 30S RIBOSOMAL SUBUNIT
Keywords keywords	30S RIBOSOMAL SUBUNIT, LOW RESOLUTION MODEL, RIBOSOME; 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.

1qd7__assembly_1__model_1

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

Download this curve (.dat)

1qd7__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1qd7__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	57.94 Å
Rg (electron density)	60.77 Å
Total Rg	60.42 Å
Atom count	359
Residues	359
Excluded volume	143190 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1qd7__assembly_1__model_1`	decameric （10）	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 (10)

Entity 1 Entity 1 polymer

Description description	CENTRAL FRAGMENT OF 16 S RNA
Molecular weight formula_weight	53096.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	A
Atom count atom_count	1305

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Entity 2 Entity 2 polymer

Description description	END FRAGMENT OF 16 S RNA
Molecular weight formula_weight	17211.4 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polyribonucleotide
Chain IDs strand_id	B

NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

Entity 3 Entity 3 polymer

Description description	S4 RIBOSOMAL PROTEIN
Molecular weight formula_weight	18624.4 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MKLSEYGLQLQEKQKLRHMYGVNERQFRKTFEEAGKMPGKHGENFMILLESRLDNLVYRLGLARTRRQARQLVTHGHILVDGSRVNIPSYRVKPGQTIAVREKSRNLQVIKEALEANNYIPDYLSFDPEKMEGTYTRLPERSELPAEINEALIVEFYSR

Entity 4 Entity 4 polymer

Description description	S5 RIBOSOMAL PROTEIN
Molecular weight formula_weight	15240.7 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

INPNKLELEERVVAVNRVAKVVKGGRRLRFSALVVVGDKNGHVGFGTGKAQEVPEAIRKAIEDAKKNLIEVPIVGTTIPHEVIGHFGAGEIILKPASEGTGVIAGGPARAVLELAGISDILSKSIGSNTPINMVRATFDGLKQLK

Entity 5 Entity 5 polymer

Description description	S6 RIBOSOMAL PROTEIN
Molecular weight formula_weight	11619.3 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

MRRYEVNIVLNPNLDQSQLALEKEIIQRALENYGARVEKVEELGLRRLAYPIAKDPQGYFLWYQVEMPEDRVNDLARELRIRDNVRRVMVVKSQEPF

Entity 6 Entity 6 polymer

Description description	S7 RIBOSOMAL PROTEIN
Molecular weight formula_weight	15342.8 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F

LQPDLVYGDVLVTAFINKIMRDGKKNLAARIFYDACKIIQEKTGQEPLKVFKQAVENVKPRMEVRSRRVGGANYQVPMEVSPRRQQSLALRWLVQAANQRPERRAAVRIAHELMDAAEGKGGAVKKKEDVERMAE

Entity 7 Entity 7 polymer

Description description	S8 RIBOSOMAL PROTEIN
Molecular weight formula_weight	15624.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	G

TDPIADMLTRIRNATRVYKESTDVPASRFKEEILRILAREGFIKGYERVDVDGKPYLRVYLKYGPRRQGPDPRPEQVIHHIRRISKPGRRVYVGVKEIPRVRRGLGIAILSTSKGVLTDREARKLGVGGELICEVW

Entity 8 Entity 8 polymer

Description description	S15 RIBOSOMAL PROTEIN
Molecular weight formula_weight	10200.8 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	H

LTQERKREIIEQFKVHENDTGSPEVQIAILTEQINNLNEHLRVHKKDHHSRRGLLKMVGKRRRLLAYLRNKDVARYREIVEKLGL

Entity 9 Entity 9 polymer

Description description	S17 RIBOSOMAL PROTEIN
Molecular weight formula_weight	10081.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	I

QRKVYVGRVVSDKMDKTITVLVETYKKHPLYGKRVKYSKKYKAHDEHNEAKVGDIVKIMETRPLSATKRFRLVEIVEKAVRAGAGAGAA

Entity 10 Entity 10 polymer

Description description	S20 RIBOSOMAL PROTEIN
Molecular weight formula_weight	8528.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	J

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

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6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (9 domains)

Domain ID domain_id	d1qd7c1
Class class	i — Low resolution protein structures
Fold Fold fold	i.1 — Ribosome and ribosomal fragments
Superfamily Superfamily superfamily	i.1.1 — Ribosome and ribosomal fragments
Family Family family	i.1.1.3 — Small subunit

Domain ID domain_id	d1qd7c2
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	d1qd7d_
Class class	i — Low resolution protein structures
Fold Fold fold	i.1 — Ribosome and ribosomal fragments
Superfamily Superfamily superfamily	i.1.1 — Ribosome and ribosomal fragments
Family Family family	i.1.1.3 — Small subunit

Domain ID domain_id	d1qd7e_
Class class	i — Low resolution protein structures
Fold Fold fold	i.1 — Ribosome and ribosomal fragments
Superfamily Superfamily superfamily	i.1.1 — Ribosome and ribosomal fragments
Family Family family	i.1.1.3 — Small subunit

Domain ID domain_id	d1qd7f_
Class class	i — Low resolution protein structures
Fold Fold fold	i.1 — Ribosome and ribosomal fragments
Superfamily Superfamily superfamily	i.1.1 — Ribosome and ribosomal fragments
Family Family family	i.1.1.3 — Small subunit

Domain ID domain_id	d1qd7g_
Class class	i — Low resolution protein structures
Fold Fold fold	i.1 — Ribosome and ribosomal fragments
Superfamily Superfamily superfamily	i.1.1 — Ribosome and ribosomal fragments
Family Family family	i.1.1.3 — Small subunit

Domain ID domain_id	d1qd7h_
Class class	i — Low resolution protein structures
Fold Fold fold	i.1 — Ribosome and ribosomal fragments
Superfamily Superfamily superfamily	i.1.1 — Ribosome and ribosomal fragments
Family Family family	i.1.1.3 — Small subunit

Domain ID domain_id	d1qd7i_
Class class	i — Low resolution protein structures
Fold Fold fold	i.1 — Ribosome and ribosomal fragments
Superfamily Superfamily superfamily	i.1.1 — Ribosome and ribosomal fragments
Family Family family	i.1.1.3 — Small subunit

Domain ID domain_id	d1qd7j_
Class class	i — Low resolution protein structures
Fold Fold fold	i.1 — Ribosome and ribosomal fragments
Superfamily Superfamily superfamily	i.1.1 — Ribosome and ribosomal fragments
Family Family family	i.1.1.3 — Small subunit

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7. Citations (8)

Structure of a bacterial 30S ribosomal subunit at 5.5 A resolution.

Nature (1999)

PMID: 10476960 · DOI: 10.1038/23631 PRIMARY

;The crystal structure of ribosomal protein S4 reveals a two-domain molecule with an extensive RNA-binding surface: one domain shows structural homology to the ETS DNA-binding motif ;

Embo J. (1998)

DOI: 10.1093/emboj/17.16.4545

;Crystal structure of ribosomal protein S8 from Thermus thermophilus reveals a high degree of structural conservation of a specific RNA binding site ;

J.Mol.Biol. (1998)

DOI: 10.1006/jmbi.1998.1758

Conformational variability of the N-terminal helix in the structure of ribosomal protein S15

Structure (1998)

The structure of ribosomal protein S7 at 1.9 A resolution reveals a beta- hairpin motif that binds double-stranded nucleic acids

Structure (1997)

DOI: 10.1016/S0969-2126(97)00269-4

Solution structure of prokaryotic ribosomal protein S17 by high-resolution NMR spectroscopy

Biochemistry (1996)

DOI: 10.1021/bi951062i

Crystal structure of the ribosomal protein S6 from Thermus thermophilus

Embo J. (1994)

The structure of ribosomal protein S5 reveals sites of interaction with 16S rRNA

Nature (1992)

DOI: 10.1038/358768a0

Unit-cell length a length_a	401.600 Å
Unit-cell length b length_b	401.600 Å
Unit-cell length c length_c	174.500 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	8

Space group space_group	P 41 21 2
Space-group number int_tables_number	92
Crystal system crystal_system	—

Resolution resolution	5.500 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

PARTIAL MODEL FOR 30S RIBOSOMAL SUBUNIT

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

S4 RIBOSOMAL PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

S5 RIBOSOMAL PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

S6 RIBOSOMAL PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

S7 RIBOSOMAL PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

S8 RIBOSOMAL PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

S15 RIBOSOMAL PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

S17 RIBOSOMAL PROTEIN

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

1qd7__assembly_1__model_1

1qd7__assembly_1__model_1 | I(q)

1qd7__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 (10)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 polymer

Polymer Polymer

Entity 6 Entity 6 polymer