6Q52

Structure of a psychrophilic CCA-adding enzyme in complex with CMPcPP at room temperature in ChipX microfluidic device

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	COUNTER-DIFFUSION	7.5	293	protein solution at 5.5 mg/mL in 50 mM Tris-HCl pH 7.5, 200 mM NaCl, 5 mM MgCl2; reservoir solution: 30% (m/v) PEG3350, 200 mM ammonium chloride pH 6.6. Crystallization and crystallographic analysis were performed using the ChipX microfluidic device.

Crystal Properties
Matthews coefficient	Solvent content
3.86	68.16

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.45	α = 90
b = 71.45	β = 90
c = 293.61	γ = 90

Symmetry
Space Group	P 43 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	293	PIXEL	DECTRIS PILATUS3 6M		2016-03-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	1.000	SLS	X10SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	Rrim I (All)	CC (Half)	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	2.3	47.77	99.5	0.18	0.987	6.9	6.7		34862			60.56

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.3	2.4	100		2.312	0.469		8.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1MIV	2.3	47.77	1.34	34840	1742	99.49	0.2012	0.1997	0.2293

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
f_dihedral_angle_d	16.879
f_angle_d	0.979
f_chiral_restr	0.065
f_bond_d	0.009
f_plane_restr	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2989
Nucleic Acid Atoms
Solvent Atoms	10
Heterogen Atoms	29

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHENIX	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.