3LDI

Crystal structure of aprotinin in complex with sucrose octasulfate: unusual interactions and implication for heparin binding

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	295	100mM sodium acetate, 2M ammonium sulfate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
3.47	64.59

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 119.08	α = 90
b = 119.08	β = 90
c = 110.794	γ = 120

Symmetry
Space Group	P 63 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 210			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PAL/PLS BEAMLINE 4A	1.0	PAL/PLS	4A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.2	50	93.2	0.092	9.3			22695

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.2	2.25	78.5		0.486

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.2	34.77	24077	21531	1164	94.26	0.207	0.206	0.234	RANDOM	21.203

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]
0.35	0.17		0.35		-0.52

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_4_deg	21.292
r_dihedral_angle_2_deg	19.192
r_dihedral_angle_3_deg	13.808
r_dihedral_angle_1_deg	6.1
r_rigid_bond_restr	2.894
r_sphericity_free	2.876
r_scangle_it	2.698
r_scbond_it	2.658
r_sphericity_bonded	1.414
r_mcangle_it	1.363
r_angle_refined_deg	1.177
r_mcbond_it	0.83
r_nbtor_refined	0.312
r_symmetry_hbond_refined	0.223
r_nbd_refined	0.188
r_symmetry_vdw_refined	0.186
r_xyhbond_nbd_refined	0.128
r_chiral_restr	0.081
r_bond_refined_d	0.008
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2248
Nucleic Acid Atoms
Solvent Atoms	220
Heterogen Atoms	107

Software

Software
Software Name	Purpose
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling