2BB5

Structure of Human Transcobalamin in complex with Cobalamin

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.6	293	20% PEG 4000, 18% ethanol, 0.2M TRIS, VAPOR DIFFUSION, HANGING DROP, temperature 293K, pH 7.60

Crystal Properties
Matthews coefficient	Solvent content
3.23	61.93

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.127	α = 90
b = 145.497	β = 90
c = 165.043	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	MARRESEARCH		2001-05-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ELETTRA BEAMLINE 5.2R		ELETTRA	5.2R

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	3.2	29.24	96.5	0.142	0.142	4.5	2.3		19417

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	3.2	3.37	95.5		0.388	0.388	1.9	2.1

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	STRUCTURE OF BOVINE TRANSCOBALAMIN IN MONOCLINIC CRYSTAL FORM (PDB 2BB6).	3.2	20	19334	19334	997	95.6	0.258	0.257	0.288	RANDOM	40.46

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]
-2.42			4.91		-2.49

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.095
r_dihedral_angle_4_deg	22.701
r_dihedral_angle_3_deg	18.765
r_dihedral_angle_1_deg	4.611
r_angle_refined_deg	1.094
r_scangle_it	0.984
r_mcangle_it	0.721
r_scbond_it	0.569
r_mcbond_it	0.392
r_symmetry_hbond_refined	0.357
r_nbtor_refined	0.299
r_symmetry_vdw_refined	0.25
r_nbd_refined	0.213
r_xyhbond_nbd_refined	0.155
r_chiral_restr	0.07
r_bond_refined_d	0.008
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	6406
Nucleic Acid Atoms
Solvent Atoms	8
Heterogen Atoms	182

Software

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