1XOC

The structure of the oligopeptide-binding protein, AppA, from Bacillus subtilis in complex with a nonapeptide.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	291	PEG8000, zinc acetate, MES, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.6	52.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 120.955	α = 90
b = 90.779	β = 90
c = 54.719	γ = 90

Symmetry
Space Group	P 21 21 2

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	ADSC QUANTUM 4	mirrors	2002-09-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX14.2	0.97920	SRS	PX14.2

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	1.55	50	97.3	0.081	18.5		88121	88121

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	1.55	1.61	72.6		0.788	1.6		6467

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-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT + MIR	THROUGHOUT	pdb entry 1DPE	1.55	30.57	83608	83608	4411	100	0.17703	0.17703	0.17552	0.20593	RANDOM	27.752

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]
-0.02			-0.31		0.33

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.508
r_dihedral_angle_3_deg	13.875
r_dihedral_angle_4_deg	12.466
r_dihedral_angle_1_deg	6.008
r_scangle_it	3.462
r_scbond_it	2.452
r_angle_refined_deg	1.469
r_mcangle_it	1.26
r_angle_other_deg	1.12
r_mcbond_it	1.048
r_symmetry_vdw_refined	0.302
r_symmetry_hbond_refined	0.265
r_mcbond_other	0.218
r_nbd_refined	0.216
r_xyhbond_nbd_refined	0.214
r_nbtor_refined	0.184
r_nbd_other	0.177
r_symmetry_vdw_other	0.149
r_chiral_restr	0.124
r_metal_ion_refined	0.095
r_nbtor_other	0.086
r_bond_refined_d	0.013
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_hbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4164
Nucleic Acid Atoms
Solvent Atoms	441
Heterogen Atoms	15

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
MLPHARE	phasing