1pcg

Helix-stabilized cyclic peptides as selective inhibitors of steroid receptor-coactivator interactions

Method: X-RAY DIFFRACTION Dmax: 68.3 Å Quality: REASONABLE

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

estrogen receptor

Homo sapiens

UniProt P03372

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 heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 304–547 Chain B; UniProt 304–547 Fragment:ligand-binding domain Mutation:C381S, C417S, C530S peptide inhibitor × 2 EST ESTRADIOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 6.8;294 K;MES, LiCl, PEG 6000, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 294K Resolution 2.70 Å R-free 0.254

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.

434 other PDB entries and 522 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name ESR1_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–244; UniProt 304–547 Author chain B; PDBConstruct 1–244; UniProt 304–547

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 1pcg

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id1pcg
Deposition date deposition_date2003-05-16
Structure title titleHelix-stabilized cyclic peptides as selective inhibitors of steroid receptor-coactivator interactions
Keywords keywordsco-activator binding site, TRANSCRIPTION-INHIBITOR COMPLEX; TRANSCRIPTION/INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier23.57
Radius of gyration Rg (electron density) rg_electron22.38
Forward intensity I(0) i048846200.00
Molecular weight molecular_weight56823.0 kDa
Excluded volume excluded_volume72264 ų
Envelope volume envelope_volume82795 ų
Hydration-shell volume shell_volume29623 ų
Envelope diameter envelope_diameter74.4
Shell Rg shell_rg30.29
Envelope Rg envelope_rg22.56
Shape Rg shape_rg22.40
Total Rg total_rg23.24
Total atoms total_atoms3978
Residues n_residues491
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 dmax68.3
Rg (real space) rg_real23.36
Rg uncertainty (real space) rg_real_error0.09
I(0) (real space) i0_real4.7060e+07
I(0) uncertainty (real space) i0_real_error4.2350e+05
Rg (reciprocal space) rg_reciprocal23.44
I(0) (reciprocal space) i0_reciprocal48850000.0000
Solution quality estimate total_estimate0.7230
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary28.8
Skewness Skewness skewness0.099
Kurtosis Kurtosis kurtosis-0.510
Angular range angular_range— – 0.3350 −1
Current regularization parameter α current_alpha8.4530
Highest regularization parameter α highest_alpha11400000.0000
Real-space data points n_real_points65
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.966; Stabil: 0.911; Sysdev: 0.000; Positv: 1.000; Valcen: 0.975; Smooth: 0.807

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1pcga_
Class classa — All alpha proteins
Fold Fold folda.123 — Nuclear receptor ligand-binding domain
Superfamily Superfamily superfamilya.123.1 — Nuclear receptor ligand-binding domain
Family Family familya.123.1.1 — Nuclear receptor ligand-binding domain
Domain ID domain_idd1pcgb_
Class classa — All alpha proteins
Fold Fold folda.123 — Nuclear receptor ligand-binding domain
Superfamily Superfamily superfamilya.123.1 — Nuclear receptor ligand-binding domain
Family Family familya.123.1.1 — Nuclear receptor ligand-binding domain

CATH v4.4 (2 domains)

Domain ID domain_id1pcgA00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology565 — Retinoid X Receptor
Homologous superfamily homologous superfamily10 — Retinoid X Receptor
Domain ID domain_id1pcgB00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology565 — Retinoid X Receptor
Homologous superfamily homologous superfamily10 — Retinoid X Receptor

8. Citations (1)

9. Files and Curves (10)