1u0w

An Aldol Switch Discovered in Stilbene Synthases Mediates Cyclization Specificity of Type III Polyketide Synthases: 18xCHS+resveratrol Structure

Method: X-RAY DIFFRACTION Dmax: 153.6 Å Quality: GOOD

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

Chalcone synthase 2

Medicago sativa

UniProt P30074

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 homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–389 Chain B; UniProt 1–389 Mutation:D96A, V98L, V99A, V100M, T131S, S133T, G134T, V135P, M137L, Y157V, M158G, M159V, Y160F, Q161H, L268K, K269G, D270A, G273D STL RESVERATROL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;277 K;PEG 8000, ammonium acetate, HEPES-Na+ buffer, ethylene glycol, resveratrol, DTT, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K Resolution 2.00 Å R-free 0.264
2 Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain C; UniProt 1–389 Chain D; UniProt 1–389 Mutation:D96A, V98L, V99A, V100M, T131S, S133T, G134T, V135P, M137L, Y157V, M158G, M159V, Y160F, Q161H, L268K, K269G, D270A, G273D STL RESVERATROL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.5;277 K;PEG 8000, ammonium acetate, HEPES-Na+ buffer, ethylene glycol, resveratrol, DTT, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K Resolution 2.00 Å R-free 0.264

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.

15 other PDB entries and 16 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CHS2_MEDSA
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 5–393; UniProt 1–389 Author chain B; PDBConstruct 5–393; UniProt 1–389 Author chain C; PDBConstruct 5–393; UniProt 1–389 Author chain D; PDBConstruct 5–393; UniProt 1–389

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 1u0w

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1u0w
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1u0w
Deposition date deposition_date2004-07-14
Structure title titleAn Aldol Switch Discovered in Stilbene Synthases Mediates Cyclization Specificity of Type III Polyketide Synthases: 18xCHS+resveratrol Structure
Keywords keywords;type III polyketide synthase, PKS, condensing enzyme, thiolase fold, alpha-beta-alpha-beta-alpha fold, aldol switch, catalytic triad, engineered resveratrol synthase, RS, STS, CHS, chalcone synthase, stilbene synthase, TRANSFERASE ;; TRANSFERASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier44.79
Radius of gyration Rg (electron density) rg_electron45.00
Forward intensity I(0) i0405803000.00
Molecular weight molecular_weight170320.0 kDa
Excluded volume excluded_volume214970 ų
Envelope volume envelope_volume267460 ų
Hydration-shell volume shell_volume50983 ų
Envelope diameter envelope_diameter156.2
Shell Rg shell_rg47.32
Envelope Rg envelope_rg44.67
Shape Rg shape_rg44.99
Total Rg total_rg45.10
Total atoms total_atoms11964
Residues n_residues1552
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 dmax153.6
Rg (real space) rg_real45.21
Rg uncertainty (real space) rg_real_error1.75
I(0) (real space) i0_real4.0580e+08
I(0) uncertainty (real space) i0_real_error7.8210e+06
Rg (reciprocal space) rg_reciprocal44.79
I(0) (reciprocal space) i0_reciprocal405600000.0000
Solution quality estimate total_estimate0.7737
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary35.1
Skewness Skewness skewness0.451
Kurtosis Kurtosis kurtosis-0.654
Angular range angular_range— – 0.1750 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha80950000.0000
Real-space data points n_real_points36
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.608; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.551; Smooth: 0.678

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_idd1u0wa1
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.95 — Thiolase-like
Superfamily Superfamily superfamilyc.95.1 — Thiolase-like
Family Family familyc.95.1.2 — Chalcone synthase-like
Domain ID domain_idd1u0wa2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.95 — Thiolase-like
Superfamily Superfamily superfamilyc.95.1 — Thiolase-like
Family Family familyc.95.1.2 — Chalcone synthase-like
Domain ID domain_idd1u0wb1
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.95 — Thiolase-like
Superfamily Superfamily superfamilyc.95.1 — Thiolase-like
Family Family familyc.95.1.2 — Chalcone synthase-like
Domain ID domain_idd1u0wb2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.95 — Thiolase-like
Superfamily Superfamily superfamilyc.95.1 — Thiolase-like
Family Family familyc.95.1.2 — Chalcone synthase-like
Domain ID domain_idd1u0wc1
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.95 — Thiolase-like
Superfamily Superfamily superfamilyc.95.1 — Thiolase-like
Family Family familyc.95.1.2 — Chalcone synthase-like
Domain ID domain_idd1u0wc2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.95 — Thiolase-like
Superfamily Superfamily superfamilyc.95.1 — Thiolase-like
Family Family familyc.95.1.2 — Chalcone synthase-like
Domain ID domain_idd1u0wd1
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.95 — Thiolase-like
Superfamily Superfamily superfamilyc.95.1 — Thiolase-like
Family Family familyc.95.1.2 — Chalcone synthase-like
Domain ID domain_idd1u0wd2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.95 — Thiolase-like
Superfamily Superfamily superfamilyc.95.1 — Thiolase-like
Family Family familyc.95.1.2 — Chalcone synthase-like

CATH v4.4 (8 domains)

Domain ID domain_id1u0wA01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Thiolase/Chalcone synthase
Domain ID domain_id1u0wA02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Thiolase/Chalcone synthase
Domain ID domain_id1u0wB01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Thiolase/Chalcone synthase
Domain ID domain_id1u0wB02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Thiolase/Chalcone synthase
Domain ID domain_id1u0wC01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Thiolase/Chalcone synthase
Domain ID domain_id1u0wC02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Thiolase/Chalcone synthase
Domain ID domain_id1u0wD01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Thiolase/Chalcone synthase
Domain ID domain_id1u0wD02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology47 — Peroxisomal Thiolase; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Thiolase/Chalcone synthase

8. Citations (1)

9. Files and Curves (10)