1RNX | pdb_00001rnx

RIBONUCLEASE A CRYSTALLIZED FROM 3M SODIUM CHLORIDE, 30% AMMONIUM SULFATE

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1SRN	RIBONUCLEASE A

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.5		CRYSTALLIZED FROM 80% AMMONIUM SULFATE (PDB ENTRY 1RNO), pH 5.5

Crystal Properties
Matthews coefficient	Solvent content
2.87	57

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 64.659	α = 90
b = 64.659	β = 90
c = 65.254	γ = 120

Symmetry
Space Group	P 32 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	290	AREA DETECTOR	SIEMENS-NICOLET X100		1993-11-14	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

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	1.9	17.2	82.7	0.035	23.68	2.92		10518		1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	RIBONUCLEASE A	1.9	8	2	9960		80.1	0.162		19.4

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]

RMS Deviations
Key	Refinement Restraint Deviation
p_scangle_it	4.22
p_scbond_it	2.61
p_angle_deg	2.39
p_mcangle_it	2.34
p_mcbond_it	1.36
p_bond_d	0.011
p_angle_d
p_planar_d
p_hb_or_metal_coord
p_plane_restr
p_chiral_restr
p_singtor_nbd
p_multtor_nbd
p_xhyhbond_nbd
p_xyhbond_nbd
p_planar_tor
p_staggered_tor
p_orthonormal_tor
p_transverse_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	951
Nucleic Acid Atoms
Solvent Atoms	103
Heterogen Atoms	4

Software

Software
Software Name	Purpose
XDS	data scaling
XSCALE	data scaling
X-PLOR	model building
PROFFT	refinement
X-PLOR	refinement
XDS	data reduction
X-PLOR	phasing