SAXSdb — 1cqu

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

50S RIBOSOMAL PROTEIN L9

OrganismNot specified

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein monomer Monomer Protein × 1 PDB declaration: monomeric（1） Consistent with protein copy count	Chain A； UniProt 1–56	Fragment：N-TERMINAL DOMAIN	No other associated polymer	SOLUTION NMR NMR measurement conditions：pH 5；298 K；Pressure AMBIENT	Resolution not provided

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 1CQU	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1DIV RIBOSOMAL PROTEIN L9 Deposited 1996-07-02	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–149（149 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.60 Å R-free 0.276
2HBA Crystal Structure of N-terminal Domain of Ribosomal Protein L9 (NTL9) K12M Deposited 2006-06-14	Different construct Different mutation/modification Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–52（52 aa） Fragment：N-terminal domain	Mutation：K12M	ZN ZINC ION × 3 CL CHLORIDE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 200 mM Zn Acetate, 2.5 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.25 Å R-free 0.164
2HBA Crystal Structure of N-terminal Domain of Ribosomal Protein L9 (NTL9) K12M Deposited 2006-06-14	Different construct Different mutation/modification Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–52（52 aa） Fragment：N-terminal domain	Mutation：K12M	ZN ZINC ION × 5 CL CHLORIDE ION × 6 IMD IMIDAZOLE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 200 mM Zn Acetate, 2.5 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.25 Å R-free 0.164
2HBA Crystal Structure of N-terminal Domain of Ribosomal Protein L9 (NTL9) K12M Deposited 2006-06-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 3 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–52（52 aa） Fragment：N-terminal domain Chain B 1–52（52 aa） Fragment：N-terminal domain	Mutation：K12M Mutation：K12M	ZN ZINC ION × 16 CL CHLORIDE ION × 20 IMD IMIDAZOLE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 200 mM Zn Acetate, 2.5 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.25 Å R-free 0.164
2HBA Crystal Structure of N-terminal Domain of Ribosomal Protein L9 (NTL9) K12M Deposited 2006-06-14	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 4 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–52（52 aa） Fragment：N-terminal domain Chain B 1–52（52 aa） Fragment：N-terminal domain	Mutation：K12M Mutation：K12M	ZN ZINC ION × 16 CL CHLORIDE ION × 20 IMD IMIDAZOLE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 200 mM Zn Acetate, 2.5 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.25 Å R-free 0.164
2HBB Crystal Structure of the N-terminal Domain of Ribosomal Protein L9 (NTL9) Deposited 2006-06-14	Different construct Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–51（51 aa） Fragment：N-terminal domain	Not recorded	ZN ZINC ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 200 mM Zn Acetate, 2.5 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.90 Å R-free 0.236
2HBB Crystal Structure of the N-terminal Domain of Ribosomal Protein L9 (NTL9) Deposited 2006-06-14	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–51（51 aa） Fragment：N-terminal domain	Not recorded	ZN ZINC ION × 8	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 200 mM Zn Acetate, 2.5 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.90 Å R-free 0.236
2HBB Crystal Structure of the N-terminal Domain of Ribosomal Protein L9 (NTL9) Deposited 2006-06-14	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 3 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–51（51 aa） Fragment：N-terminal domain	Not recorded	ZN ZINC ION × 8	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 200 mM Zn Acetate, 2.5 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.90 Å R-free 0.236
2HVF Crystal Structure of N-terminal Domain of Ribosomal Protein L9 (NTL9), G34dA Deposited 2006-07-28	Different construct Different mutation/modification Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–52（52 aa） Fragment：N-terminal domain	Mutation：G34(DAL) Non-standard monomer：Yes (specific site not provided by mmCIF)	ZN ZINC ION × 4 CL CHLORIDE ION × 4 IMD IMIDAZOLE × 1 ACY ACETIC ACID × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 300 mM Zn Acetate, 3 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.57 Å R-free 0.208
2HVF Crystal Structure of N-terminal Domain of Ribosomal Protein L9 (NTL9), G34dA Deposited 2006-07-28	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–52（52 aa） Fragment：N-terminal domain	Mutation：G34(DAL) Non-standard monomer：Yes (specific site not provided by mmCIF)	ZN ZINC ION × 8 CL CHLORIDE ION × 8 IMD IMIDAZOLE × 2 ACY ACETIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；291 K；10 mM Imidazole (pH 8.0), 300 mM Zn Acetate, 3 M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 291K	Resolution 1.57 Å R-free 0.208
487D SEVEN RIBOSOMAL PROTEINS FITTED TO A CRYO-ELECTRON MICROSCOPIC MAP OF THE LARGE 50S SUBUNIT AT 7.5 ANGSTROMS RESOLUTION Deposited 2000-02-23	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric	Chain K 1–149（149 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY mmCIF provides none of the parsed conditions	Resolution 7.50 Å
4V42 Crystal structure of the ribosome at 5.5 A resolution. Deposited 2001-03-30	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Heteromer；Protein × 42 PDB declaration: 49-meric	Chain BK 1–149（149 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 5.50 Å

6 other PDB entries and 12 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	RL9_BACST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–56； UniProt 1–56

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	1cqu
Deposition date deposition_date	1999-08-11
Structure title title	SOLUTION STRUCTURE OF THE N-TERMINAL DOMAIN OF RIBOSOMAL PROTEIN L9
Keywords keywords	PROTEIN L9, RIBOSOME; RIBOSOME
Experimental Method method	SOLUTION NMR

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	12.54 Å
Radius of gyration Rg (electron density) rg_electron	12.12 Å
Forward intensity I(0) i0	160203000.00
Molecular weight molecular_weight	112060.0 kDa
Excluded volume excluded_volume	143270 Å³
Envelope volume envelope_volume	20501 Å³
Hydration-shell volume shell_volume	11581 Å³
Envelope diameter envelope_diameter	53.5 Å
Shell Rg shell_rg	20.93 Å
Envelope Rg envelope_rg	17.11 Å
Shape Rg shape_rg	12.08 Å
Total Rg total_rg	12.58 Å
Total atoms total_atoms	16344
Residues n_residues	1008
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	33.2 Å
Rg (real space) rg_real	11.77 Å
Rg uncertainty (real space) rg_real_error	0.05 Å
I(0) (real space) i0_real	1.5340e+08
I(0) uncertainty (real space) i0_real_error	1.2700e+06
Rg (reciprocal space) rg_reciprocal	12.70 Å
I(0) (reciprocal space) i0_reciprocal	160200000.0000
Solution quality estimate total_estimate	0.6852
Solution quality rating solution_quality	REASONABLE a REASONABLE solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	14.3 Å
Skewness Skewness skewness	0.312
Kurtosis Kurtosis kurtosis	-0.429
Angular range angular_range	— – 0.5000 Å⁻¹
Current regularization parameter α current_alpha	3.1190
Highest regularization parameter α highest_alpha	27200.0000
Real-space data points n_real_points	80
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.001; Oscil: 0.989; Stabil: 0.988; Sysdev: 0.000; Positv: 1.000; Valcen: 0.977; Smooth: 0.000

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (1)

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7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d1cqua_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.100 — MbtH/L9 domain-like
Superfamily Superfamily superfamily	d.100.1 — L9 N-domain-like
Family Family family	d.100.1.1 — Ribosomal protein L9 N-domain

CATH v4.4 (1 domains)

Domain ID domain_id	1cquA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	5 — Ribosomal Protein L9; domain 1
Homologous superfamily homologous superfamily	10 — Ribosomal protein L9, N-terminal domain

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8. Citations (2)

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 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	1

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

Description description	50S RIBOSOMAL PROTEIN L9
Molecular weight formula_weight	6231.3 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	16344

fit	/app/data/saxs_computation/cq/1cqu/1cqu.fit
pddf	/app/data/pr_computation/cq/1cqu/1cqu.pr.out
profile	/app/data/saxs_computation/cq/1cqu/1cqu.dat

SOLUTION STRUCTURE OF THE N-TERMINAL DOMAIN OF RIBOSOMAL PROTEIN L9

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

50S RIBOSOMAL PROTEIN L9

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

6. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

8. Citations (2)

9. Files and Curves (10)

Files (7)

Curves (3)