2GTP

Crystal structure of the heterodimeric complex of human RGS1 and activated Gi alpha 1

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2BV1	PDB IDs 2BV1 and 1Y3A used as starting models for RGS1 and GNAI1 respectively.
experimental model	PDB	1Y3A	PDB IDs 2BV1 and 1Y3A used as starting models for RGS1 and GNAI1 respectively.

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	293	0.2M NaNO3, 0.1M bis-Tris propane, pH 6.5, 20 % PEG3350, 10 % Ethylene glycol, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.79	55.98

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 90.451	α = 90
b = 102.904	β = 90
c = 128.761	γ = 90

Symmetry
Space Group	P 21 21 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	CCD	MARMOSAIC 225 mm CCD		2006-03-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	0.9789	SLS	X10SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.55	50	98.5				39406

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.55	2.64	99

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB IDs 2BV1 and 1Y3A used as starting models for RGS1 and GNAI1 respectively.	2.55	46.7	37274	37274	1976	98.42	0.22839	0.22839	0.2259	0.27562	RANDOM	27.466

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]
1.52			-0.44		-1.08

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.469
r_dihedral_angle_4_deg	19.067
r_dihedral_angle_3_deg	15.847
r_dihedral_angle_1_deg	5.606
r_scangle_it	1.72
r_angle_refined_deg	1.354
r_scbond_it	1.164
r_angle_other_deg	0.964
r_mcangle_it	0.663
r_mcbond_it	0.391
r_symmetry_vdw_other	0.236
r_nbd_refined	0.215
r_symmetry_hbond_refined	0.214
r_metal_ion_refined	0.211
r_nbd_other	0.186
r_nbtor_refined	0.185
r_xyhbond_nbd_refined	0.135
r_symmetry_vdw_refined	0.108
r_mcbond_other	0.105
r_nbtor_other	0.088
r_chiral_restr	0.075
r_bond_refined_d	0.012
r_gen_planes_refined	0.004
r_bond_other_d	0.003
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7007
Nucleic Acid Atoms
Solvent Atoms	134
Heterogen Atoms	68

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data scaling
PHASER	phasing