Experiment: 2XGJ

Structure of Mtr4, a DExH helicase involved in nuclear RNA processing and surveillance

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		IN HOUSE SE-MET MAD STRUCTURE

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6		PROTEIN WAS CRYSTALLISED IN 50 MM MES PH 6.0, 200 MM AMMONIUM ACETATE, 20 % (W/V) PEG3350. 15% ETHYLENE GLYCOL WAS USED AS A CRYOPROTECTANT.

Crystal Properties
Matthews coefficient	Solvent content
3.2	64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 100.11	α = 90
b = 126.019	β = 99.21
c = 102.272	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	PIXEL	DECTRIS PILATUS 6M	DYNAMICALLY BENDABLE MIRROR, MERIDIONAL - VERTICAL	2009-11-30	M	SINGLE WAVELENGTH

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

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	2.9	53.4	99.7	0.11	11.3	5.5		55417		2	53.84

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)
1	2.9	3.06	100		0.54	3.9	5.4

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)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	IN HOUSE SE-MET MAD STRUCTURE	2.9	53.453	1.35	55391	2806	99.54	0.203	0.2005	0.2005	0.2474	0.2474	51.2

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]
-0.2091		2.288	2.5094		-2.3003

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	15.704
f_angle_d	0.623
f_chiral_restr	0.041
f_bond_d	0.002
f_plane_restr	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	13537
Nucleic Acid Atoms	217
Solvent Atoms	81
Heterogen Atoms	54

Software

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