2F96

2.1 A crystal structure of Pseudomonas aeruginosa rnase T (Ribonuclease T)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	294	PEG 3350, 25% W/V, MG CHLORIDE 0.2 M BIS-TRIS 0.3M NDSB 256, , pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K

Crystal Properties
Matthews coefficient	Solvent content
2.38	48.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.879	α = 90
b = 76.636	β = 93.55
c = 61.666	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	SI 111 CHANNEL	2005-06-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID		APS	19-ID

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	2.09	50	99.5	0.125	17.93	4.3		27229		-3

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	2.09	2.18	96.5		0.441	2.567	2.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	SAD	THROUGHOUT	2.09	19.97	25803	1366	99.29	0.16013	0.15775	0.20448	RANDOM	28.587

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]
-0.02		0.02	0.01		0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.576
r_dihedral_angle_3_deg	14.289
r_dihedral_angle_4_deg	10.225
r_scangle_it	7.618
r_scbond_it	5.731
r_dihedral_angle_1_deg	5.678
r_mcangle_it	3.102
r_mcbond_it	2.433
r_angle_refined_deg	1.345
r_angle_other_deg	0.773
r_mcbond_other	0.607
r_symmetry_vdw_other	0.286
r_nbd_refined	0.205
r_nbtor_refined	0.182
r_xyhbond_nbd_refined	0.177
r_nbd_other	0.176
r_symmetry_hbond_refined	0.139
r_nbtor_other	0.085
r_metal_ion_refined	0.081
r_chiral_restr	0.08
r_symmetry_vdw_refined	0.069
r_bond_refined_d	0.014
r_gen_planes_refined	0.005
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3099
Nucleic Acid Atoms
Solvent Atoms	230
Heterogen Atoms	2

Software

Software
Software Name	Purpose
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
SHELXD	phasing
SHELXE	model building
MLPHARE	phasing
DM	model building
SOLVE	phasing
ARP/wARP	model building
O	model building
Coot	model building
CCP4	model building
REFMAC	refinement
HKL-3000	phasing
DM	phasing
CCP4	phasing