3LF9

Crystal structure of HIV epitope-scaffold 4E10_D0_1IS1A_001_C

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	277	PEG 4000, Ca chloride, Tris, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.23	44.75

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 40.66	α = 90
b = 75.36	β = 90
c = 79.61	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	107	CCD	RIGAKU SATURN 944+	Rigaku Varimax HF	2008-06-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007	1.54

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	2	32.64	98.3	0.052	18.6	4.53	8462	8462			27.7

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)
	2	2.07	89.9		0.185	4	2.66	755

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	Computationally-derived model of the epitope-scaffold, based on 1IS1	2	27.37	8032	8032	396	98.17	0.20697	0.20444	0.25969	RANDOM	30.398

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]
-0.05			-0.05		0.1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.408
r_dihedral_angle_4_deg	18.106
r_dihedral_angle_3_deg	13.319
r_dihedral_angle_1_deg	4.013
r_scangle_it	3.3
r_scbond_it	2.233
r_mcangle_it	1.403
r_angle_refined_deg	1.004
r_mcbond_it	0.938
r_angle_other_deg	0.841
r_symmetry_vdw_other	0.322
r_symmetry_vdw_refined	0.221
r_nbd_refined	0.219
r_mcbond_other	0.214
r_xyhbond_nbd_refined	0.207
r_nbd_other	0.202
r_symmetry_hbond_refined	0.191
r_nbtor_refined	0.178
r_nbtor_other	0.087
r_chiral_restr	0.057
r_bond_refined_d	0.011
r_bond_other_d	0.004
r_gen_planes_refined	0.004
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	907
Nucleic Acid Atoms
Solvent Atoms	127
Heterogen Atoms

Software

Software
Software Name	Purpose
CrystalClear	data collection
MOLREP	phasing
REFMAC	refinement
d*TREK	data reduction
d*TREK	data scaling