1LR8

Crystal structure of Fs1, the heparin-binding domain of follistatin, complexed with the heparin analogue D-myo-inositol hexasulphate (Ins6S)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	289	15-25% PEG8000, 0.2-0.6 M Magnesium acetate, 0.1 M Sodium cacodylate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
1.96	35.85

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 21.499	α = 90
b = 38.208	β = 90
c = 77.945	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	2001-06-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29	0.9202	ESRF	ID29

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	2.1	38.9	98.6	0.081		3.5		4026			19.44

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)
	2.1	2.18	99.7		0.206

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 ENTRY 1LR7	2.1	38.92	3394	3200	193	97.56	0.22216	0.22216	0.22071	0.25133	RANDOM	21.635

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]
-1.25			1.7		-0.45

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	21.755
r_dihedral_angle_1_deg	5.029
r_scangle_it	4.947
r_scbond_it	3.073
r_angle_refined_deg	2.281
r_mcangle_it	1.999
r_mcbond_it	1.143
r_angle_other_deg	0.972
r_symmetry_vdw_other	0.317
r_symmetry_hbond_refined	0.306
r_symmetry_vdw_refined	0.299
r_nbd_refined	0.259
r_nbd_other	0.239
r_symmetry_hbond_other	0.203
r_xyhbond_nbd_refined	0.163
r_xyhbond_nbd_other	0.159
r_chiral_restr	0.105
r_bond_refined_d	0.023
r_gen_planes_refined	0.008
r_gen_planes_other	0.003
r_bond_other_d	0.001
r_nbtor_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	533
Nucleic Acid Atoms
Solvent Atoms	21
Heterogen Atoms	28

Software

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