3FEP

Crystal structure of the R132K:R111L:L121E:R59W-CRABPII mutant complexed with a synthetic ligand (merocyanin) at 2.60 angstrom resolution.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.3	277	0.1M MES, 0.2M ammonium sulfate, 30% PEGMME 5000, pH 6.3, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.13	60.66

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.808	α = 90
b = 55.808	β = 90
c = 108.177	γ = 120

Symmetry
Space Group	P 31 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	MARMOSAIC 225 mm CCD		2007-10-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-F	0.97850	APS	21-ID-F

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	2.6	48.34	88.4	0.058	43.3	9.2		5671		1	38.6

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	2.6	2.69	41.3		0.544	1.9	4.5	265

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 2G7B	2.6	44.13	5394	260	88.5	0.2354	0.2354	0.23246	0.29309	RANDOM	38.88

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]
3.76	1.88		3.76		-5.65

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.839
r_dihedral_angle_3_deg	16.339
r_dihedral_angle_4_deg	9.159
r_dihedral_angle_1_deg	5.968
r_angle_refined_deg	0.886
r_mcangle_it	0.739
r_mcbond_it	0.447
r_scangle_it	0.429
r_symmetry_hbond_refined	0.36
r_nbtor_refined	0.328
r_scbond_it	0.28
r_nbd_refined	0.274
r_xyhbond_nbd_refined	0.261
r_symmetry_vdw_refined	0.233
r_chiral_restr	0.044
r_bond_refined_d	0.006
r_gen_planes_refined	0.003
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1090
Nucleic Acid Atoms
Solvent Atoms	39
Heterogen Atoms	31

Software

Software
Software Name	Purpose
HKL-2000	data collection
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling