2PCU
Human carboxypeptidase A4 in complex with a cleaved hexapeptide.
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 2BO9 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 7.5 | 277 | Crystals were obtained from sitting drops subjected to vapor diffusion and containing consisting of 100nL of hCPA4:hexapeptide (15 mg/mL in 5mM Tris HCl pH 7.5) and 100nL of reservoir solution (0.2M potassium thiocyanate / 20% PEG 3350). Crystallisation drops were dispensed on 96x3-well Greiner plates by a Tecan robot and a Cartesian nanodrop robot (Genomic Solutions) at the joint IBMB-CSIC/Barcelona Science Park Automated Crystallization Platform (PAC). Crystals appeared after incubation for 10-15 days in a Bruker steady-temperature crystal farm at 4 C., VAPOR DIFFUSION, SITTING DROP, temperature 277K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.13 | 42.32 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 50.304 | α = 90 |
b = 72.494 | β = 90 |
c = 81.575 | γ = 90 |
Symmetry | |
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Space Group | P 21 21 21 |
Diffraction
Diffraction Experiment | ||||||||||||||
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ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 110 | CCD | ADSC QUANTUM 210 | 2006-01-01 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | ESRF BEAMLINE ID29 | 1.036 | ESRF | ID29 |
Data Collection
Overall | |||||||||||||||||||
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ID # | 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 | |||||||
1 | 1.6 | 72.548 | 98.7 | 0.093 | 0.093 | 4.1 | 6.1 | 39536 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||||
1 | 1.6 | 1.69 | 95.1 | 0.346 | 0.346 | 2 | 3.2 | 5427 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | R-Factor (Observed) | R-Work (Depositor) | R-Work (DCC) | R-Free (Depositor) | R-Free (DCC) | R-Free Selection Details | Mean Isotropic B | ||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 2BO9 | 1.6 | 50 | 39536 | 39478 | 609 | 98.48 | 0.159 | 0.159 | 0.159 | 0.17 | 0.176 | 0.19 | RANDOM | 25.621 |
Temperature Factor Modeling | ||||||
---|---|---|---|---|---|---|
Anisotropic B[1][1] | Anisotropic B[2][2] | Anisotropic B[3][3] | ||||
-0.94 | -1.29 | 2.23 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 29.517 |
r_dihedral_angle_4_deg | 15.219 |
r_dihedral_angle_3_deg | 12.45 |
r_dihedral_angle_1_deg | 5.995 |
r_scangle_it | 4.138 |
r_scbond_it | 2.669 |
r_mcangle_it | 1.707 |
r_angle_refined_deg | 1.626 |
r_mcbond_it | 1.094 |
r_symmetry_vdw_refined | 0.345 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 2461 |
Nucleic Acid Atoms | |
Solvent Atoms | 267 |
Heterogen Atoms | 33 |
Software
Software | |
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Software Name | Purpose |
SCALA | data scaling |
REFMAC | refinement |
PDB_EXTRACT | data extraction |
ProDC | data collection |
MOSFLM | data reduction |
CCP4 | data scaling |
AMoRE | phasing |