3PF4

Crystal structure of Bs-CspB in complex with r(GUCUUUA)

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	293.15	protein buffer: 50mM TRIS, 20mM Na-HEPES, pH 7.5; Bs-CspB.rGUCUUUA complex concentration: 50mg/ml; crystallization buffer: 30% (w/v) PEG 4000, 0.2M MgCl2, 0.1M TRIS pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 293.15K

Crystal Properties
Matthews coefficient	Solvent content
2.13	42.19

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.275	α = 90
b = 50.512	β = 90
c = 57.802	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	110	CCD	RAYONIX MX-225	mirrors double crystal monochromator (Si-111 crystals)	2009-07-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.2	0.9184	BESSY	14.2

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	1.38	19.02	99.6	0.039	20.73	4.74	30207	30207		-3	22.784

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	1.38	1.5	99.8		0.59	2.8	4.72	6586

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 1CSP	1.38	19.02	30207	30207	1511		0.156	0.156	0.154	0.194	RANDOM	22.247

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]
-0.01			0.1		-0.1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.564
r_dihedral_angle_4_deg	20.246
r_dihedral_angle_3_deg	11.977
r_sphericity_free	8.931
r_scangle_it	5.907
r_dihedral_angle_1_deg	5.844
r_sphericity_bonded	4.26
r_scbond_it	4.185
r_mcangle_it	3.291
r_mcbond_it	2.234
r_rigid_bond_restr	2.01
r_angle_refined_deg	1.634
r_mcbond_other	1.144
r_angle_other_deg	0.865
r_chiral_restr	0.099
r_bond_refined_d	0.017
r_gen_planes_refined	0.008
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1030
Nucleic Acid Atoms	97
Solvent Atoms	194
Heterogen Atoms	2

Software

Software
Software Name	Purpose
XSCALE	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
XDS	data reduction