1NQG

OUTER MEMBRANE COBALAMIN TRANSPORTER (BTUB) FROM E. COLI, WITH BOUND CALCIUM

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1NQF	PDB ENTRY 1NQF

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.6	293	PEG 3350, MAGNESIUM ACETATE, BIS-TRIS, N-OCTYL TETRAOXYETHYLENE, pH 6.6, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.27	62.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 81.632	α = 90
b = 81.632	β = 90
c = 225.685	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	MARRESEARCH		2002-08-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-ID	1.255	APS	17-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	3.3	35	95.6	0.079	30.4	9.7	13745	13146		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.3	3.33	95.8		0.22	8.6	9.4	316

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 1NQF	3.31	20	12961	12327	642	95.11	0.236	0.236	0.234	0.259	RANDOM	31.768

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]
-0.55	-0.27		-0.55		0.82

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	21.592
r_scangle_it	14.94
r_scbond_it	10.808
r_mcangle_it	7.536
r_dihedral_angle_1_deg	7.094
r_mcbond_it	4.91
r_angle_refined_deg	2.619
r_angle_other_deg	1.053
r_nbd_refined	0.372
r_nbd_other	0.354
r_symmetry_vdw_other	0.325
r_xyhbond_nbd_other	0.32
r_symmetry_vdw_refined	0.262
r_symmetry_hbond_refined	0.228
r_xyhbond_nbd_refined	0.226
r_chiral_restr	0.135
r_nbtor_other	0.058
r_bond_refined_d	0.028
r_gen_planes_refined	0.012
r_gen_planes_other	0.008
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4555
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	130

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
REFMAC	refinement