3cul

Aminoacyl-tRNA synthetase ribozyme

Method: X-RAY DIFFRACTION Dmax: 139.7 Å Quality: REASONABLE

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

U1 small nuclear ribonucleoprotein A

Homo sapiens

UniProt P09012

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–RNA Monomer Protein × 1 RNA 1 PDB declaration: dimeric(2) Consistent with all polymer counts Chain A; UniProt 1–98 Fragment:UNP residues 1-98 Mutation:Y31H, Q36R Non-standard monomer:Yes (specific site not provided by mmCIF) RNA (92-MER) × 1 MG MAGNESIUM ION × 8 K POTASSIUM ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 7;295 K;100 mM magnesium formate, 15% PEG 3000, 1 M lithium chloride, pH 7.0, VAPOR DIFFUSION, temperature 295K Resolution 2.80 Å R-free 0.283
2 Protein–RNA Monomer Protein × 1 RNA 1 PDB declaration: dimeric(2) Consistent with all polymer counts Chain B; UniProt 1–98 Fragment:UNP residues 1-98 Mutation:Y31H, Q36R Non-standard monomer:Yes (specific site not provided by mmCIF) RNA (92-MER) × 1 MG MAGNESIUM ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 7;295 K;100 mM magnesium formate, 15% PEG 3000, 1 M lithium chloride, pH 7.0, VAPOR DIFFUSION, temperature 295K Resolution 2.80 Å R-free 0.283

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.

87 other PDB entries and 144 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SNRPA_HUMAN
Isoform
PDB entities 3
Chains and sequence ranges Author chain A; PDBConstruct 5–96; UniProt 1–98 Author chain B; PDBConstruct 5–96; UniProt 1–98

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.

SAXS scattering curve SAXS Profile

SAXS profile for 3cul

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 3cul
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2. Structure Basics 2. Structure Basics

Entry ID entry_id3cul
Deposition date deposition_date2008-04-16
Structure title titleAminoacyl-tRNA synthetase ribozyme
Keywords keywordscatalytic RNA ribozyme ARS, RNA-RNA binding COMPLEX; RNA/RNA binding
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier37.48
Radius of gyration Rg (electron density) rg_electron36.75
Forward intensity I(0) i0236818000.00
Molecular weight molecular_weight79984.0 kDa
Excluded volume excluded_volume80932 ų
Envelope volume envelope_volume130980 ų
Hydration-shell volume shell_volume32684 ų
Envelope diameter envelope_diameter146.9
Shell Rg shell_rg38.70
Envelope Rg envelope_rg35.98
Shape Rg shape_rg36.66
Total Rg total_rg37.00
Total atoms total_atoms5334
Residues n_residues359
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

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

Maximum dimension Dmax dmax139.7
Rg (real space) rg_real37.80
Rg uncertainty (real space) rg_real_error1.78
I(0) (real space) i0_real2.3680e+08
I(0) uncertainty (real space) i0_real_error4.4800e+06
Rg (reciprocal space) rg_reciprocal37.60
I(0) (reciprocal space) i0_reciprocal236800000.0000
Solution quality estimate total_estimate0.6345
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary43.2
Skewness Skewness skewness0.534
Kurtosis Kurtosis kurtosis0.046
Angular range angular_range— – 0.2100 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha4925000.0000
Real-space data points n_real_points43
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.726; Stabil: 1.000; Sysdev: 0.080; Positv: 1.000; Valcen: 0.872; Smooth: 0.953

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd3cula_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.58 — Ferredoxin-like
Superfamily Superfamily superfamilyd.58.7 — RNA-binding domain, RBD, aka RNA recognition motif (RRM)
Family Family familyd.58.7.1 — Canonical RBD
Domain ID domain_idd3culb_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.58 — Ferredoxin-like
Superfamily Superfamily superfamilyd.58.7 — RNA-binding domain, RBD, aka RNA recognition motif (RRM)
Family Family familyd.58.7.1 — Canonical RBD

CATH v4.4 (2 domains)

Domain ID domain_id3culA00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily330 — RRM (RNA recognition motif) domain
Domain ID domain_id3culB00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily330 — RRM (RNA recognition motif) domain

8. Citations (1)

9. Files and Curves (10)