2QI1

Crystal structure of protease inhibitor, MIT-1-KK81 in complex with wild type HIV-1 protease

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.2	298	126 mM Sodium Phosphate, 63 mM sodium citrate, 24-29% ammonium sulphate , pH 6.2, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 50.777	α = 90
b = 58.029	β = 90
c = 61.779	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	200	IMAGE PLATE	RIGAKU RAXIS IV	osmic mirrors	2006-02-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU	1.5418

Data Collection

Overall
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	2	50	99.7	0.054	5.4	11.6	6.7		12846

Refinement

Statistics
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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1F7A	2	42.3	12183	12183	625	99.73	0.15861	0.15861	0.1563	0.20498	RANDOM	22.603

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]
-0.5			-0.19		0.69

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.669
r_dihedral_angle_4_deg	14.034
r_dihedral_angle_3_deg	10.729
r_dihedral_angle_1_deg	5.828
r_scangle_it	1.514
r_angle_refined_deg	1.211
r_scbond_it	0.994
r_angle_other_deg	0.69
r_mcangle_it	0.686
r_mcbond_it	0.508
r_nbd_refined	0.17
r_nbd_other	0.17
r_nbtor_refined	0.164
r_symmetry_vdw_other	0.157
r_xyhbond_nbd_refined	0.135
r_symmetry_hbond_refined	0.128
r_symmetry_vdw_refined	0.107
r_mcbond_other	0.096
r_nbtor_other	0.078
r_chiral_restr	0.076
r_bond_refined_d	0.008
r_gen_planes_refined	0.003
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1494
Nucleic Acid Atoms
Solvent Atoms	154
Heterogen Atoms	60

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
AMoRE	phasing