2QTX

Crystal structure of an Hfq-like protein from Methanococcus jannaschii

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8.5	277	25% PEG 3350, 0.2M Ammonium Acetate, 0.1M Tris, VAPOR DIFFUSION, SITTING DROP, temperature 277K, pH 8.50

Crystal Properties
Matthews coefficient	Solvent content
2.25	45.31

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 57.866	α = 90
b = 67.11	β = 104.03
c = 119.064	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	100	CCD	MARMOSAIC 225 mm CCD	DYNAMICALLY BENDABLE MIRRORS	2006-11-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA		SLS	X06SA

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	2.5	250	92.5	0.056	17	3.4		28424			48.18

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)
	2.5	2.59	57.5		0.209	3.7	1.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1U1S	2.5	38.5	28393	28393	1422	92.2	0.18	0.232	RANDOM	41.43

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]
10.309		-6.041	-6.476		-3.833

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	14.5
f_angle_deg	0.928
f_bond_d	0.005
f_bond_d_na
f_bond_d_prot
f_angle_d
f_angle_d_na
f_angle_d_prot
f_angle_deg_na
f_angle_deg_prot
f_dihedral_angle_d_na
f_dihedral_angle_d_prot
f_improper_angle_d
f_improper_angle_d_na
f_improper_angle_d_prot
f_mcbond_it
f_mcangle_it
f_scbond_it
f_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5615
Nucleic Acid Atoms
Solvent Atoms	130
Heterogen Atoms

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
RESOLVE	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
HKL-2000	data scaling