1S4Y

Crystal structure of the activin/actrIIb extracellular domain

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.7	277	PEG 3350, magnesium chloride, bis tris, pH 6.7, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.6	53.78

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 86.29	α = 90
b = 120.627	β = 90
c = 43.55	γ = 90

Symmetry
Space Group	P 21 21 2

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	ADSC QUANTUM 4		2003-05-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.2	1.0332	ALS	8.2.2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.3	100		0.047				19028

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.3	2.38	94.4		0.213

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.3	70.71	18101	18101	988	91.58	0.21021	0.20611	0.28615	RANDOM	30.082

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]
-0.72			-0.25		0.96

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	9.264
r_scangle_it	5.037
r_scbond_it	3.378
r_angle_refined_deg	2.385
r_mcangle_it	2.086
r_mcbond_it	1.17
r_angle_other_deg	1.109
r_symmetry_hbond_refined	0.378
r_symmetry_vdw_other	0.274
r_symmetry_vdw_refined	0.261
r_nbd_other	0.254
r_xyhbond_nbd_refined	0.252
r_nbd_refined	0.219
r_chiral_restr	0.133
r_nbtor_other	0.103
r_bond_refined_d	0.031
r_gen_planes_refined	0.01
r_bond_other_d	0.006
r_gen_planes_other	0.006
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3102
Nucleic Acid Atoms
Solvent Atoms	177
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
EPMR	phasing