3FSM

CRYSTAL STRUCTURE OF A CHEMICALLY SYNTHESIZED 203 AMINO ACID 'COVALENT DIMER' [L-Ala51,D-Ala51'] HIV-1 PROTEASE MOLECULE

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	293	0.1M CITRATE, 0.2M SODIUM PHOPHATE, 30% (W/V) AMMONIUM SULFATE, 10% (V/V) DMSO , pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.03	39.49

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.472	α = 90
b = 58.286	β = 90
c = 61.45	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	110	CCD	MARMOSAIC 300 mm CCD	double crystal monochromator and K-B pair of biomorph mirrors for vertical and horizontal focusing with two additional horizontally deflecting mirrors	2007-02-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-B	1.03320	APS	23-ID-B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	50	99.8	0.079	22.636	4.9	25109	25109		81.1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.6	1.66	98.3		0.677	2.9	4.8	2419

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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		THROUGHOUT	PDB ENTRY 2O40	1.6	20	25039	1274	99.77	0.201	0.199	0.235	RANDOM	25.825

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]
0.06			-0.32		0.26

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.541
r_dihedral_angle_4_deg	15.876
r_dihedral_angle_3_deg	12.681
r_dihedral_angle_1_deg	6.412
r_scangle_it	3.694
r_scbond_it	2.449
r_angle_refined_deg	1.634
r_mcangle_it	1.617
r_mcbond_it	1.081
r_angle_other_deg	0.901
r_mcbond_other	0.32
r_nbd_other	0.195
r_nbd_refined	0.192
r_symmetry_vdw_other	0.177
r_nbtor_refined	0.173
r_symmetry_hbond_refined	0.158
r_xyhbond_nbd_refined	0.131
r_symmetry_vdw_refined	0.115
r_chiral_restr	0.111
r_nbtor_other	0.088
r_bond_refined_d	0.016
r_xyhbond_nbd_other	0.01
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1545
Nucleic Acid Atoms
Solvent Atoms	118
Heterogen Atoms	54

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
MOLREP	phasing