2B0U

The Structure of the Follistatin:Activin Complex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	295	PEG 3350, 200 mM Malonate, pH 7.0, vapor diffusion, hanging drop, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.61	52.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 109.25	α = 90
b = 120.82	β = 90
c = 70.57	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	MARRESEARCH		2004-12-03		SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 5ID-B	0.97923	APS	5ID-B

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	2.8	19.35	99.2			23605	23416

Refinement

Statistics
Diffraction ID	Structure Solution Method	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	MIR	2.8	19.35	23381	23416	1177	98.9	0.301	0.301	0.265	0.297	thin shells	30.103

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]
3.017			1.856		-4.873

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5863
Nucleic Acid Atoms
Solvent Atoms	141
Heterogen Atoms	41

Software

Software
Software Name	Purpose
SCALA	data scaling
SHARP	phasing
CNS	refinement
PDB_EXTRACT	data extraction
MAR345	data collection
CCP4	data scaling