2ARV

Structure of human Activin A

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.8	298	Ammonium sulphate, PEG300, Na-Hepes, pH 7.8, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
3.5	64.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.572	α = 90
b = 96.247	β = 90
c = 118.038	γ = 90

Symmetry
Space Group	I 2 2 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		2005-07-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM14	0.978847	ESRF	BM14

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	29.2	97.9	0.065		5		24229	2	2

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 1S4Y	2	29.2	22157	22157	1151	93.73	0.21802	0.21802	0.2159	0.2592	RANDOM	50.624

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]
-1.31			-0.07		1.39

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.931
r_dihedral_angle_4_deg	25.176
r_dihedral_angle_3_deg	18.983
r_scangle_it	10.048
r_scbond_it	7.966
r_mcangle_it	7.935
r_dihedral_angle_1_deg	6.703
r_mcbond_it	6.511
r_angle_refined_deg	1.381
r_nbtor_refined	0.326
r_nbd_refined	0.271
r_symmetry_vdw_refined	0.262
r_xyhbond_nbd_refined	0.229
r_chiral_restr	0.135
r_symmetry_hbond_refined	0.103
r_bond_refined_d	0.016
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1744
Nucleic Acid Atoms
Solvent Atoms	54
Heterogen Atoms	55

Software

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