1FM9

THE 2.1 ANGSTROM RESOLUTION CRYSTAL STRUCTURE OF THE HETERODIMER OF THE HUMAN RXRALPHA AND PPARGAMMA LIGAND BINDING DOMAINS RESPECTIVELY BOUND WITH 9-CIS RETINOIC ACID AND GI262570 AND CO-ACTIVATOR PEPTIDES.


X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 7.5
Temperature 22.0
Details 17% PEG 4K, 200mM NaSCN, 8% Ethylene Glycol , pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 22K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 46.14 α = 90
b = 54.05 β = 90
c = 211.15 γ = 90
Symmetry
Space Group P 21 21 21

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 93
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD MARRESEARCH -- 1999-12-01
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON APS BEAMLINE 17-ID -- APS 17-ID

Data Collection

Overall
Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) R Sym I (Observed) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot
2.1 20 98.8 0.094 -- -- -- -- 25483 -- -- 25.3

Refinement

Statistics
Structure Solution Method Refinement High Resolution Refinement Low Resolution Cut-off Sigma (I) Cut-off Sigma (F) Number of Reflections (All) Number of Reflections (Observed) Number of Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work R-Free R-Free Selection Details
-- 2.1 20.0 -- 2.0 -- 29087 2895 91.8 -- 0.239 0.239 0.268 RANDOM
High Resolution Shell
Refinement method Shell Resolution (High) Shell Resolution (Low) # of Reflections (Observed) # of Reflections (R-Free) # of Reflections (R-Work) R-Factor (R-Work) R-Factor (R-Free) R-Factor (R-Free Error) Percent Reflections (Observed)
X Ray Diffraction 2.1 2.23 -- 444 3820 0.308 0.334 0.016 82.5
Temperature Factor Modeling
Temperature Factor Value
Isotropic Thermal Model RESTRAINED
Mean Isotropic B 49.0
Anisotropic B[1][1] -3.73
Anisotropic B[1][2] 0.0
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 6.42
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] -2.69
RMS Deviations
Key Refinement Restraint Deviation
c_scangle_it 2.22
c_scbond_it 1.41
c_mcangle_it 2.14
c_mcbond_it 1.2
c_improper_angle_d 0.96
c_dihedral_angle_d 20.4
c_angle_deg 1.6
c_bond_d 0.013
Coordinate Error
Parameter Value
Luzzati ESD (Observed) 0.28
Luzzati Sigma A (Observed) 0.27
Luzzati Resolution Cutoff (Low) 5.0
Luzzati ESD (R-Free Set) 0.33
Luzzati Sigma A (R-Free Set) 0.3
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 4148
Nucleic Acid Atoms 0
Heterogen Atoms 63
Solvent Atoms 131

Software

Computing
Computing Package Purpose
MAR Data Reduction (intensity integration)
HKL-2000 Data Reduction (data scaling)
X-PLOR Structure Solution
CNS 0.5 Structure Refinement
Software
Software Name Purpose
CNS version: 0.5 refinement
X-PLOR model building