4R4K

Crystal structure of a cystatin-like protein (BACCAC_01506) from Bacteroides caccae ATCC 43185 at 1.69 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4	277	26.0% polyethylene glycol 8000, 0.2M lithium sulfate, 0.1M sodium acetate pH 4.0, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.61	52.82

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 107.355	α = 90
b = 62.823	β = 106.57
c = 115.349	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	MARMOSAIC 325 mm CCD	double crystal monochromator	2014-02-14	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.91837,0.97946	SSRL	BL9-2

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	1.69	29.757	98.7	0.111	6.96			81133		-3	23.881

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	1.7	1.76	98.4		0.015	1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	1.69	29.757	80945	4046	99.05	0.1765	0.1752	0.2026	RANDOM	29.6425

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]
0.4		0.27	-0.13		-0.3

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.401
r_dihedral_angle_4_deg	15.445
r_dihedral_angle_3_deg	14.066
r_dihedral_angle_1_deg	5.219
r_mcangle_it	3.921
r_mcbond_it	2.667
r_mcbond_other	2.658
r_angle_refined_deg	1.413
r_angle_other_deg	1.348
r_chiral_restr	0.087
r_bond_refined_d	0.01
r_gen_planes_refined	0.008
r_bond_other_d	0.007
r_gen_planes_other	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4916
Nucleic Acid Atoms
Solvent Atoms	622
Heterogen Atoms	199

Software

Software
Software Name	Purpose
MolProbity	model building
PDB_EXTRACT	data extraction
SHELX	phasing
SHARP	phasing
XSCALE	data scaling
REFMAC	refinement
XDS	data reduction
SHELXD	phasing