Experiment: 1A8F

HUMAN SERUM TRANSFERRIN, RECOMBINANT N-TERMINAL LOBE

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
other		HUMAN TRANSFERRIN

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.1		PROTEIN WAS CRYSTALLIZED FROM 40% (V/V) ETHANOL WITH 50MM POTASSIUM CACODYLATE, PH 6.1. GROWN IN SITTING DROPS AT 277 K. RESERVOIRS CONTAINED 40% (V/V) ETHANOL, 50MM POTASSIUM CACODYLATE, PH 5.8 - 6.3. PRIOR TO CRYSTALLIZATION, THE PROTEIN WAS DIALYSED AGAINST SODIUM BICARBONATE, PH 8.1, vapor diffusion - sitting drop

Crystal Properties
Matthews coefficient	Solvent content
2.75	55.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.674	α = 90
b = 72.674	β = 90
c = 154.286	γ = 90

Symmetry
Space Group	P 41 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	113	IMAGE PLATE	RIGAKU RAXIS IIC		1996-02-02	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

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	1.8	30	94	0.082	6.6	4.8		36895		3	24

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	R-FREE	HUMAN TRANSFERRIN	1.8	30	36834	36834	1797	93.8	0.202	0.202	0.197	0.1826	0.25	0.2443	RANDOM SELECTION

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]

RMS Deviations
Key	Refinement Restraint Deviation
t_dihedral_angle_d	19.6
t_it	2.83
t_angle_deg	1.5
t_nbd	0.113
t_gen_planes	0.013
t_bond_d	0.011
t_trig_c_planes	0.009
t_incorr_chiral_ct
t_pseud_angle

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2570
Nucleic Acid Atoms
Solvent Atoms	268
Heterogen Atoms	9

Software

Software
Software Name	Purpose
DENZO	data reduction
ROTAVATA	data reduction
Agrovata	data reduction
AMoRE	phasing
TNT	refinement
CCP4	data scaling
ROTAVATA	data scaling