8AAS

Crystal structure of the Pyrococcus abyssi RPA trimerization core bound to poly-dT20 ssDNA

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	277	10% w/v PEG 8K 0.1M imidazole pH 8 0.2 M calcium acetate

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.82

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 75.234	α = 90
b = 75.234	β = 90
c = 215.487	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	100	PIXEL	DECTRIS EIGER X 16M	KB Mirrors	2021-12-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SOLEIL BEAMLINE PROXIMA 1	0.978565	SOLEIL	PROXIMA 1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim 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	3.2	48.26	80.7	0.067	0.068	0.013	1	27.1	27.2		10041			163.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.2	3.28	21.2		4.189	4.27	0.816	0.454	1	26.8

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	Working model of the full apo-RPA	3.2	48.26	10041	494	81.5	0.2655	0.2641	0.2933	RANDOM	173.43

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]
1.688			1.688		-3.3761

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	16.91
t_omega_torsion	2.41
t_angle_deg	0.85
t_bond_d	0.008
t_dihedral_angle_d
t_gen_planes
t_it
t_chiral_improper_torsion
t_utility_distance
t_utility_angle

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	16.91
t_omega_torsion	2.41
t_angle_deg	0.85
t_bond_d	0.008
t_dihedral_angle_d
t_gen_planes
t_it
t_chiral_improper_torsion
t_utility_distance
t_utility_angle
t_ideal_dist_contact

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3771
Nucleic Acid Atoms	280
Solvent Atoms
Heterogen Atoms	6

Software

Software
Software Name	Purpose
BUSTER	refinement
XDS	data reduction
STARANISO	data scaling
MOLREP	phasing
MxCuBE	data collection
Coot	model building

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 R01GM133198.