2BBJ

Crystal structure of the CorA Mg2+ transporter

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2BBH	PDB ENTRY 2BBH

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	297	20% PEG2000, 0.3M Mg(NO3)2, 0.1M Tris, pH8.0, VAPOR DIFFUSION, HANGING DROP, temperature 297K

Crystal Properties
Matthews coefficient	Solvent content
3.81	67.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 136.979	α = 90
b = 173.181	β = 90
c = 134.179	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 315		2005-02-23	M	SINGLE WAVELENGTH
2	1	100	CCD	ADSC QUANTUM 4		2005-02-25

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-ID	1.0	APS	17-ID
2	SYNCHROTRON	APS BEAMLINE 19-ID	1.0	APS	19-ID

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	3.9	50	95.9	0.092	0.133	13.3	11.4	28963	28963

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)
	3.9	4.04	77.2		0.42	0.787	1.23	6	2304

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	THROUGHOUT	PDB ENTRY 2BBH	3.9	20	27320	27320	1424	97.39	0.36301	0.36301	0.36077	0.40649	RANDOM	162.504

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]
11.02			-19.56		8.54

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	26.13
r_dihedral_angle_3_deg	12.749
r_dihedral_angle_4_deg	8.164
r_dihedral_angle_1_deg	3.01
r_angle_refined_deg	1.172
r_nbtor_refined	0.306
r_symmetry_vdw_refined	0.224
r_scangle_it	0.204
r_nbd_refined	0.202
r_mcangle_it	0.195
r_xyhbond_nbd_refined	0.137
r_scbond_it	0.122
r_mcbond_it	0.108
r_chiral_restr	0.074
r_symmetry_hbond_refined	0.049
r_bond_refined_d	0.007
r_gen_planes_refined	0.002
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	13810
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

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