1LR7

Crystal structure of Fs1, the heparin-binding domain of follistatin, complexed with the heparin analogue sucrose octasulphate (SOS)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	289	30-35% 2-propanol, 0.6-0.7 M ammonium acetate, 0.1 M Tris-HCl, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
1.83	36.49

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 21.593	α = 90
b = 38.153	β = 90
c = 78.497	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	ADSC QUANTUM 4	Mirrors	2001-02-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4	0.9795	ESRF	ID14-4

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.5	39.2	95	0.071		5.8		10456			14.21

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.5	1.53	71.8		0.196

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.5	39.22	10412	9913	499	94.87	0.1905	0.1905	0.18892	0.22211	RANDOM	15.641

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]
-0.77			1.77		-1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	21.576
r_dihedral_angle_1_deg	4.944
r_scangle_it	4.862
r_scbond_it	3.227
r_angle_refined_deg	2.099
r_mcangle_it	2.073
r_mcbond_it	1.289
r_angle_other_deg	0.886
r_symmetry_hbond_refined	0.262
r_nbd_refined	0.26
r_xyhbond_nbd_refined	0.241
r_xyhbond_nbd_other	0.239
r_nbd_other	0.2
r_symmetry_vdw_other	0.165
r_chiral_restr	0.118
r_symmetry_vdw_refined	0.065
r_bond_refined_d	0.02
r_gen_planes_refined	0.01
r_gen_planes_other	0.002
r_bond_other_d	0.001
r_nbtor_other
r_symmetry_hbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	522
Nucleic Acid Atoms
Solvent Atoms	78
Heterogen Atoms	30

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing
REFMAC	refinement