1PY3

Crystal structure of Ribonuclease Sa2

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1RGG	PDB entry 1RGG

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.2	293	ammonium sulfate, phosphate buffer, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.03	59.46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 102.29	α = 90
b = 68.7	β = 100.4
c = 57.51	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	AREA DETECTOR	MARRESEARCH	mirrors	1996-04-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X31	0.9185	EMBL/DESY, HAMBURG	X31

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	1.8	15	99.2	0.052	20.5	3.45	35955	35955			23.2

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	1.8	1.83	98.4		0.378	2.96	2.8	1759

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 1RGG	1.8	15	34158	1796	99.2	0.175	0.17484	0.17246	0.21825	RANDOM	26.486

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]
-0.89		0.13	2.17		-1.23

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	16.616
r_dihedral_angle_1_deg	7.282
r_scangle_it	6.332
r_sphericity_bonded	5.693
r_scbond_it	4.179
r_mcangle_it	3.229
r_rigid_bond_restr	2.131
r_angle_other_deg	2.112
r_mcbond_it	2.048
r_angle_refined_deg	1.832
r_symmetry_vdw_other	0.307
r_symmetry_vdw_refined	0.303
r_nbd_other	0.254
r_nbd_refined	0.24
r_xyhbond_nbd_refined	0.234
r_symmetry_hbond_refined	0.231
r_chiral_restr	0.123
r_nbtor_other	0.098
r_bond_refined_d	0.021
r_gen_planes_refined	0.009
r_gen_planes_other	0.005
r_bond_other_d	0.002
r_dihedral_angle_2_deg
r_xyhbond_nbd_other
r_symmetry_hbond_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2215
Nucleic Acid Atoms
Solvent Atoms	277
Heterogen Atoms	5

Software

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