6P57

Crystal Structure of the Beta Subunit of Luteinizing Hormone

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	298	Sitting drop with the drop composed of equal quantities of 20 mg/ml protein dissolved in water, and 20% PEG 3350 plus 1% beta octyl glucoside dissolved in 0.10 M MES buffer at pH 6.5. Room temperature crystallization.

Crystal Properties
Matthews coefficient	Solvent content
2.79	56

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 80.016	α = 90
b = 80.016	β = 90
c = 206.13	γ = 90

Symmetry
Space Group	F 2 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	CCD	MARRESEARCH		1998-06-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X7B	1.1	NSLS	X7B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	Rrim I (All)	CC (Half)	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	3	60	98.43	0.15	0.14	0.16	0.89	9.1	9.35		6465			85

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3	3.15	98		0.64	0.6	0.68	0.34	3.3	9.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	1HCN	3.16	33.32	5482	289	98.43	0.21095	0.20716	0.28605	RANDOM	146.762

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]
-1.6			-1.24		2.84

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	26.276
r_long_range_B_other	18.074
r_long_range_B_refined	18.073
r_dihedral_angle_3_deg	14.293
r_mcangle_it	9.209
r_mcangle_other	9.205
r_scangle_other	7.906
r_dihedral_angle_4_deg	6.628
r_mcbond_other	5.709
r_mcbond_it	5.707
r_dihedral_angle_1_deg	5.67
r_scbond_it	5.108
r_scbond_other	5.098
r_angle_refined_deg	1.804
r_angle_other_deg	0.999
r_chiral_restr	0.123
r_gen_planes_refined	0.015
r_bond_refined_d	0.01
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1658
Nucleic Acid Atoms
Solvent Atoms	23
Heterogen Atoms	174

Software

Software
Software Name	Purpose
REFMAC	refinement
d*TREK	data reduction
d*TREK	data scaling
PHASER	phasing