1T44

Structural basis of actin sequestration by thymosin-B4: Implications for arp2/3 activation

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1P8Z	PDB ENTRY 1P8Z

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICROBATCH	6.5	293	PEG 8000, Sodium acetate, calcium chloride, pH 6.5, microbatch, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.55	51.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 56.85	α = 90
b = 69.335	β = 94.93
c = 80.233	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					M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29	1.0052	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	20		0.114	11.4	3.3	39223	39223

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	2.1			0.198	3.6	3.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1P8Z	2	20	39223	2079	98.15	0.14709	0.14445	0.19531	RANDOM	14.977

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]
1.14		0.35	-0.42		-0.66

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.574
r_scangle_it	4.545
r_scbond_it	2.95
r_mcangle_it	1.629
r_angle_refined_deg	1.434
r_mcbond_it	0.969
r_angle_other_deg	0.868
r_symmetry_vdw_other	0.252
r_nbd_other	0.245
r_nbd_refined	0.203
r_xyhbond_nbd_refined	0.162
r_symmetry_hbond_refined	0.106
r_chiral_restr	0.094
r_nbtor_other	0.086
r_metal_ion_refined	0.078
r_symmetry_vdw_refined	0.068
r_bond_refined_d	0.014
r_gen_planes_refined	0.005
r_gen_planes_other	0.004
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3959
Nucleic Acid Atoms
Solvent Atoms	427
Heterogen Atoms	34

Software

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