1R8B

Crystal Structures of an Archaeal Class I CCA-Adding Enzyme and Its Nucleotide

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.4	293	Calcium Chloride, Ethanol, Tris, magnesium chloride, sodium chloride, pH 6.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.58	52.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 86.402	α = 90
b = 79.371	β = 97.33
c = 78.135	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	100	CCD	ADSC QUANTUM 4			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X26C	1.0	NSLS	X26C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	40		0.068				35218		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.07	100

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2	38.63	33402	1812	99.75	0.18315	0.1807	0.19	0.22822	0.24	RANDOM	22.577

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]
0.1		0.29	1.46		-1.48

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.15
r_scangle_it	5.84
r_scbond_it	3.726
r_mcangle_it	2.56
r_mcbond_it	1.473
r_angle_refined_deg	1.447
r_angle_other_deg	0.806
r_symmetry_vdw_other	0.312
r_metal_ion_refined	0.255
r_nbd_other	0.237
r_nbd_refined	0.213
r_xyhbond_nbd_refined	0.193
r_symmetry_hbond_refined	0.149
r_symmetry_vdw_refined	0.136
r_chiral_restr	0.087
r_nbtor_other	0.085
r_bond_refined_d	0.016
r_gen_planes_refined	0.006
r_gen_planes_other	0.005
r_bond_other_d	0.002
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_hbond_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	3630
Nucleic Acid Atoms
Solvent Atoms	329
Heterogen Atoms	68

Software

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