3GWO

Structure of the C-terminal Domain of a Putative HIV-1 gp41 Fusion Intermediate

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	295	28% Jeffamine M600, 0.1M MES, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.13	42.13

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 33.957	α = 90
b = 33.957	β = 90
c = 174.838	γ = 120

Symmetry
Space Group	P 31 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	95	CCD	ADSC QUANTUM 4		2003-07-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X4A	0.9793,0.9796,0.9681	NSLS	X4A

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	20.7	99.3	0.062	15.6	8.4	14912	14912			28

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	1.65	1.71	100		0.485	5.2	8.7	1470

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.65	20.7	14912	14912	752	99.3	0.23288	0.23288	0.23156	0.2593	RANDOM	31.224

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]
0.75	0.38		0.75		-1.13

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.451
r_dihedral_angle_3_deg	15.423
r_dihedral_angle_4_deg	7.58
r_scangle_it	4.552
r_dihedral_angle_1_deg	3.5
r_scbond_it	3.145
r_mcangle_it	2.149
r_angle_refined_deg	1.722
r_mcbond_it	1.202
r_nbtor_refined	0.313
r_symmetry_vdw_refined	0.252
r_nbd_refined	0.231
r_xyhbond_nbd_refined	0.162
r_symmetry_hbond_refined	0.151
r_symmetry_metal_ion_refined	0.129
r_chiral_restr	0.127
r_metal_ion_refined	0.057
r_bond_refined_d	0.018
r_gen_planes_refined	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	829
Nucleic Acid Atoms
Solvent Atoms	47
Heterogen Atoms	37

Software

Software
Software Name	Purpose
ADSC	data collection
SOLVE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling