1XU1

The crystal structure of APRIL bound to TACI

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	292	well solution: 70% MPD, 0.1 M Hepes, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 292K

Crystal Properties
Matthews coefficient	Solvent content
2.1	40

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 59.339	α = 90
b = 91.839	β = 90
c = 102.268	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	SBC-3		2004-06-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-BM	0.98040	APS	19-BM

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	50	99.6	0.086	7.4	6.4	44579	44579		-3	21

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	1.9	1.97	100		0.347	0.347	3.1	6.5	4416

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	APRIL alone, pdbcode 1U5Z	1.9	30	-3	44518	40069	4449	99.59	0.1709	0.17087	0.16724	0.20317	THIN SHELLS	18.42

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]
0.39			-0.37		-0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.509
r_scangle_it	5.266
r_mcangle_it	4.203
r_scbond_it	3.423
r_mcbond_it	2.558
r_angle_refined_deg	1.216
r_angle_other_deg	0.739
r_nbd_other	0.244
r_symmetry_vdw_other	0.242
r_symmetry_hbond_refined	0.216
r_nbd_refined	0.177
r_xyhbond_nbd_refined	0.117
r_chiral_restr	0.087
r_nbtor_other	0.081
r_symmetry_vdw_refined	0.057
r_bond_refined_d	0.009
r_gen_planes_refined	0.005
r_gen_planes_other	0.004
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4149
Nucleic Acid Atoms
Solvent Atoms	130
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
AMoRE	phasing