2R5B

Structure of the gp41 N-trimer in complex with the HIV entry inhibitor PIE7

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.5	298	0.1M MES, 0.2M NaCl, 10 mM zinc sulfate, 25% PEG 550 MME, pH 6.5, vapor diffusion, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.22	44.64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 47.024	α = 90
b = 106.201	β = 90
c = 76.7	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS IV		2007-04-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.541

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	1.95	50	99.8	0.076	11.2	5.7	14410	14381

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	1.95	2.02	99.3		0.559		4.8	1393

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	26.54	14378	13329	1027	99.85	0.209	0.203	0.279	RANDOM, TOTAL REFLECTIONS OVER 1000 in RFREE SET	27.962

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]
-0.3			1.44		-1.14

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	43.718
r_dihedral_angle_4_deg	19.147
r_dihedral_angle_3_deg	18.36
r_scangle_it	4.678
r_dihedral_angle_1_deg	4.337
r_scbond_it	3.166
r_mcangle_it	1.891
r_mcbond_it	1.226
r_angle_refined_deg	1.146
r_nbtor_refined	0.291
r_symmetry_vdw_refined	0.27
r_nbd_refined	0.191
r_xyhbond_nbd_refined	0.146
r_symmetry_hbond_refined	0.106
r_chiral_restr	0.075
r_bond_refined_d	0.013
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1524
Nucleic Acid Atoms
Solvent Atoms	132
Heterogen Atoms	15

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection