1G9M

HIV-1 HXBC2 GP120 ENVELOPE GLYCOPROTEIN COMPLEXED WITH CD4 AND INDUCED NEUTRALIZING ANTIBODY 17B

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1GC1	pdb entry 1gc1

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.4	293	VAPOUR DIFFUSION CRYSTALLIZATION: 0.5 UL OF PROTEIN (~10MG/ML IN 350 MM NACL, 5 MM TRISCL PH 7.0) + 0.4 UL OF 0.1 M NACITRATE, 0.02 M NAHEPES, 10% ISOPROPANOL, 10.5% MONOMETHYL-PEG 5000, 0.0075% SEAPREP AGAROSE, PH 6.4 OVER A RESERVOIR OF 0.35 M NACL, 0.1 M NACITRATE, 0.02 M NAHEPES, 10% ISOPROPANOL, 10.5% MONOMETHYL-PEG 5000, PH 6.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3	59

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.25	α = 90
b = 88.11	β = 90
c = 196.54	γ = 90

Symmetry
Space Group	P 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	FUJI		1996-05-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X4A	0.97953	NSLS	X4A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	2.2	20	87.7	0.145	0.145	5.33	2.47	138810	56183		-0.35	17.5

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.2	2.28	66.3		0.382	0.382	2.1	1.6	4207

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	THIS DEPOSIT IS THE REFINEMENT OF THE PREVIOUSLY DETERMINED 1GC1 STRUCTURE	THROUGHOUT	pdb entry 1gc1	2.2	20	63582	55781	3946	87.7	0.2676	0.3299	random	31.5

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]
-8.268			1.01		7.258

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	26.2
c_scangle_it	3.13
c_mcangle_it	2.94
c_scbond_it	2.06
c_mcbond_it	1.7
c_angle_deg	1.1889
c_improper_angle_d	0.87
c_bond_d	0.0074

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7149
Nucleic Acid Atoms
Solvent Atoms	953
Heterogen Atoms	220

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.