2J0Q

The crystal structure of the Exon Junction Complex at 3.2 A resolution

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1FUU	PDB ENTRIES 1FUU, 1FUK, AND 1P27
experimental model	PDB	1FUK	PDB ENTRIES 1FUU, 1FUK, AND 1P27
experimental model	PDB	1P27	PDB ENTRIES 1FUU, 1FUK, AND 1P27

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				10% PEG 4000, 200 MM AMMONIUM ACETATE, 10 MM CACL2, NA CACODYLATE PH 6.5 .

Crystal Properties
Matthews coefficient	Solvent content
2.7	55.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 69.15	α = 90
b = 161.24	β = 90
c = 193.24	γ = 90

Symmetry
Space Group	P 21 21 21

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	MARRESEARCH		2006-06-17	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)	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	3.2	50	95.4	0.24	0.24	4.8	3.1		34926		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)
1	3.2	3.4	97.2		0.68	0.68	2	3.1

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 ENTRIES 1FUU, 1FUK, AND 1P27	3.2	46.98	33179	1747	100	0.235	0.232	0.277	RANDOM	66.93

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]
0.67			-0.81		0.14

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.345
r_dihedral_angle_3_deg	18.051
r_dihedral_angle_4_deg	16.657
r_dihedral_angle_1_deg	6.772
r_angle_refined_deg	1.287
r_scangle_it	1.078
r_angle_other_deg	0.815
r_mcangle_it	0.631
r_scbond_it	0.588
r_mcbond_it	0.387
r_nbd_refined	0.206
r_nbd_other	0.181
r_nbtor_refined	0.178
r_symmetry_vdw_refined	0.165
r_xyhbond_nbd_refined	0.148
r_symmetry_vdw_other	0.144
r_symmetry_hbond_refined	0.131
r_nbtor_other	0.084
r_chiral_restr	0.078
r_bond_refined_d	0.009
r_gen_planes_refined	0.003
r_bond_other_d	0.002
r_gen_planes_other	0.001
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	10919
Nucleic Acid Atoms	242
Solvent Atoms	1
Heterogen Atoms	64

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing