2B34

Structure of MAR1 Ribonuclease from Caenorhabditis elegans

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	291	20% PEG3350, 0.2M sodium acetate, 0.1M Tris , pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.2	44.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.545	α = 90
b = 113.973	β = 90
c = 151.322	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	103	IMAGE PLATE	RIGAKU RAXIS IV	Mirrors	2005-03-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.5418

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	2.14	50	98.3	0.062	23.4	3.5	84631	84631		1	18.7

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)
	2.14	2.22	94.7		0.168		3.3	8022

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	The starting model was created by the Swiss-Model Server based on PDB entry 1X9G using the C. elegans target sequence (F35G2.2)	2.141	41.67	78165	78165	4183	97.49	0.2217	0.2217	0.2195	0.2627	RANDOM	25.126

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]
-0.46			-0.89		1.35

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.471
r_dihedral_angle_4_deg	19.117
r_dihedral_angle_3_deg	13.68
r_dihedral_angle_1_deg	5.182
r_scangle_it	1.263
r_angle_refined_deg	1.058
r_scbond_it	0.795
r_mcangle_it	0.679
r_mcbond_it	0.399
r_nbtor_refined	0.297
r_symmetry_vdw_refined	0.201
r_nbd_refined	0.19
r_symmetry_hbond_refined	0.124
r_xyhbond_nbd_refined	0.102
r_chiral_restr	0.072
r_bond_refined_d	0.007
r_gen_planes_refined	0.003
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11856
Nucleic Acid Atoms
Solvent Atoms	607
Heterogen Atoms

Software

Software
Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction