2PJP

Structure of the mRNA-binding domain of elongation factor SelB from E.coli in complex with SECIS RNA

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	298	6.7 mM calcium chloride, 33 mM sodium acetate ,10% 2-methyl-2,4-pentanediol, 0.17M sodium fluoride (final), pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
3.26	62.26

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 103.498	α = 90
b = 56.515	β = 95.6
c = 48.414	γ = 90

Symmetry
Space Group	C 1 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	CCD	MAR CCD 165 mm	mirrors	2005-11-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM30A	0.9797	ESRF	BM30A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2	51.503	95.7	0.101	0.101	5	3.5	17473	18032			38.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2	2.11	92.8		0.94	0.94	0.6	2.6	2545

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	PDB ENTRY 1WSU	2.3	51.5	11957	850	95.59	0.204	0.2	0.251	RANDOM	31.599

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]
-1.73		-0.01	0.47		1.26

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.278
r_dihedral_angle_4_deg	24.846
r_dihedral_angle_3_deg	21.834
r_dihedral_angle_1_deg	7.225
r_scangle_it	4.134
r_scbond_it	3.047
r_angle_refined_deg	2.463
r_mcangle_it	1.968
r_mcbond_it	1.057
r_metal_ion_refined	0.468
r_symmetry_metal_ion_refined	0.46
r_nbtor_refined	0.304
r_symmetry_vdw_refined	0.292
r_xyhbond_nbd_refined	0.238
r_nbd_refined	0.237
r_chiral_restr	0.161
r_symmetry_hbond_refined	0.127
r_bond_refined_d	0.021
r_gen_planes_refined	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	982
Nucleic Acid Atoms	491
Solvent Atoms	112
Heterogen Atoms	24

Software

Software
Software Name	Purpose
SCALA	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
Xnemo	data collection
MOSFLM	data reduction