2GHS

CRYSTAL STRUCTURE OF A CALCIUM-BINDING PROTEIN, REGUCALCIN (AGR_C_1268) FROM AGROBACTERIUM TUMEFACIENS STR. C58 AT 1.55 A RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION,SITTING DROP,NANODROP		277	22% PEG 3350, 0.2M NA_Potassium Chloride, VAPOR DIFFUSION,SITTING DROP,NANODROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
1.92	35.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.258	α = 90
b = 75.703	β = 90
c = 81.538	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	ADSC QUANTUM 315	Flat mirror (vertical focusing)	2004-05-16	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.918370, 0.979156, 0.979535	SSRL	BL11-1

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	1.55	29.3	76.7	0.077	0.077	5.9	3.4		32369

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	1.55	1.63	30.6	30.6	0.406	0.406	1.3	2.1

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.55	29.3	30729	1606	76.58	0.139	0.13911	0.137	0.176	RANDOM	11.803

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]
0.92			0.01		-0.93

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.808
r_dihedral_angle_3_deg	12.549
r_dihedral_angle_4_deg	12.506
r_scangle_it	6.241
r_dihedral_angle_1_deg	6.168
r_scbond_it	4.138
r_mcangle_it	2.701
r_mcbond_it	1.684
r_angle_refined_deg	1.528
r_angle_other_deg	0.81
r_mcbond_other	0.524
r_symmetry_vdw_other	0.25
r_nbd_refined	0.207
r_nbd_other	0.192
r_nbtor_refined	0.169
r_symmetry_hbond_refined	0.154
r_xyhbond_nbd_refined	0.151
r_metal_ion_refined	0.107
r_chiral_restr	0.097
r_nbtor_other	0.083
r_symmetry_vdw_refined	0.068
r_bond_refined_d	0.015
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2229
Nucleic Acid Atoms
Solvent Atoms	378
Heterogen Atoms	6

Software

Software
Software Name	Purpose
REFMAC	refinement
SCALA	data scaling
PDB_EXTRACT	data extraction
MOSFLM	data reduction
CCP4	data scaling
SHARP	phasing