Experiment: 3NBF

Q28E mutant of hera helicase N-terminal domain bound to 8-oxo-ADP

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2GXS

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	310	15% PEG 3350, 0.2M sodium citrate, 0.1M HEPES/NaOH pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 310K

Crystal Properties
Matthews coefficient	Solvent content
2.69	54.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.648	α = 68.9
b = 60.676	β = 77.29
c = 74.085	γ = 72.64

Symmetry
Space Group	P 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	PSI PILATUS 6M		2010-05-31	M	SINGLE WAVELENGTH

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

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	1.9	46.5	95.7	0.041	7.6	2.4		70329			30.5

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.9	1.93	94.6		0.592	1.2	2.4	2091

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-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	2GXS	1.9	41.512	0.05	64866	3231	88.25	0.1861	0.1841	0.1814	0.2218	0.2174	random

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]
3.7702	-0.9355	4.6631	-4.516	5.7191	0.7458

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	17.103
f_angle_d	1.092
f_chiral_restr	0.07
f_bond_d	0.007
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6232
Nucleic Acid Atoms
Solvent Atoms	265
Heterogen Atoms	240

Software

Software
Software Name	Purpose
PHASER	phasing
PHENIX	refinement
XDS	data reduction
SCALA	data scaling