2QMJ

Crystral Structure of the N-terminal Subunit of Human Maltase-Glucoamylase in Complex with Acarbose


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2QLYPDB entry 2QLY

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP6.529320% PEG 3350, 0.2M sodium sulfate, 4% 1,1,1,3,3,3-hexafluoro-2-propanol, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Crystal Properties
Matthews coefficientSolvent content
2.6453.33

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 86.97α = 90
b = 109.367β = 90
c = 109.271γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 42007-05-19MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONCHESS BEAMLINE F10.9175CHESSF1

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Sym I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
11.93098.70.10915.37.682234-3
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.91.9796.20.4013.46.47898

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB entry 2QLY1.919.787767677676408298.160.179230.177290.21516RANDOM24.108
Temperature Factor Modeling
Anisotropic B[1][1]Anisotropic B[1][2]Anisotropic B[1][3]Anisotropic B[2][2]Anisotropic B[2][3]Anisotropic B[3][3]
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.176
r_dihedral_angle_4_deg18.486
r_dihedral_angle_3_deg12.914
r_dihedral_angle_1_deg6.847
r_scangle_it4.098
r_scbond_it2.713
r_mcangle_it1.75
r_angle_refined_deg1.672
r_mcbond_it1.11
r_nbtor_refined0.318
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.176
r_dihedral_angle_4_deg18.486
r_dihedral_angle_3_deg12.914
r_dihedral_angle_1_deg6.847
r_scangle_it4.098
r_scbond_it2.713
r_mcangle_it1.75
r_angle_refined_deg1.672
r_mcbond_it1.11
r_nbtor_refined0.318
r_symmetry_vdw_refined0.24
r_nbd_refined0.209
r_symmetry_hbond_refined0.171
r_xyhbond_nbd_refined0.162
r_chiral_restr0.116
r_bond_refined_d0.016
r_gen_planes_refined0.007
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms6912
Nucleic Acid Atoms
Solvent Atoms626
Heterogen Atoms159

Software

Software
Software NamePurpose
REFMACrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing