2Q31

Actin Dimer Cross-linked Between Residues 41 and 374 and proteolytically cleaved by subtilisin between residues 47 and 48.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	298	30% MPD, 0.1 M sodium acetate, 0.01M calcium chloride, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.46	50.03

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 108.253	α = 90
b = 71.984	β = 104.68
c = 54.703	γ = 90

Symmetry
Space Group	P 1 21 1

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 315		2005-10-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.2	1.00	ALS	8.2.2

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	2.7	90	87.5	0.176	5.7	2.8	19970	19970		-3	47

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	2.7	2.8	55.8		0.418		2.1	1262

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	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	difference Fourier	THROUGHOUT	pdb entry 2Q1N	2.7	43.07	3	19970	15349	764	68.09	0.251	0.249	0.288	RANDOM	24.744

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]
1.21		0.44	-1.53		0.54

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.439
r_dihedral_angle_4_deg	14.838
r_dihedral_angle_3_deg	10.657
r_dihedral_angle_1_deg	3.213
r_angle_refined_deg	1.035
r_scangle_it	0.806
r_mcangle_it	0.797
r_angle_other_deg	0.796
r_mcbond_it	0.555
r_scbond_it	0.534
r_symmetry_vdw_other	0.243
r_nbd_refined	0.193
r_mcbond_other	0.186
r_symmetry_vdw_refined	0.184
r_nbd_other	0.173
r_nbtor_refined	0.17
r_xyhbond_nbd_refined	0.153
r_metal_ion_refined	0.099
r_nbtor_other	0.081
r_symmetry_hbond_refined	0.061
r_chiral_restr	0.057
r_bond_refined_d	0.006
r_gen_planes_refined	0.002
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5245
Nucleic Acid Atoms
Solvent Atoms	31
Heterogen Atoms	122

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
BOS	data collection