2O40

Crystal Structure of a Chemically Synthesized 203 Amino Acid 'Covalent Dimer' 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
2.04	39.58

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.326	α = 90
b = 58.306	β = 90
c = 61.699	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	MARRESEARCH		2006-08-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-B	0.97932	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	1.65	50	98.3	0.072	14.6	4.8	22728	22342	1672	1672

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	1.651	1.694	88.68		0.749	2.67	4.6	1583

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1.65	20	21665	21383	1163	98.7	0.19335	0.19106	0.2	0.23748	0.24	RANDOM	19.973

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			-0.15		0.09

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	41.376
r_dihedral_angle_4_deg	17.352
r_dihedral_angle_3_deg	13.449
r_dihedral_angle_1_deg	6.214
r_scangle_it	4.005
r_scbond_it	2.626
r_mcangle_it	1.811
r_angle_refined_deg	1.599
r_mcbond_it	1.168
r_angle_other_deg	0.89
r_mcbond_other	0.339
r_symmetry_hbond_refined	0.297
r_nbd_refined	0.205
r_nbd_other	0.194
r_symmetry_vdw_refined	0.188
r_nbtor_refined	0.169
r_symmetry_vdw_other	0.167
r_xyhbond_nbd_refined	0.108
r_chiral_restr	0.105
r_nbtor_other	0.091
r_bond_refined_d	0.017
r_gen_planes_refined	0.007
r_bond_other_d	0.004
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1543
Nucleic Acid Atoms
Solvent Atoms	57
Heterogen Atoms	54

Software

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