2TRH

TERTIARY STRUCTURES OF THREE AMYLOIDOGENIC TRANSTHYRETIN VARIANTS AND IMPLICATIONS FOR AMYLOID FIBRIL FORMATION

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		PURIFIED PROTEIN (20MG/ML IN 100MM TRIS BUFFER, PH 7.5) WAS CRYSTALLIZED FROM\\ 2.25M AMMONIUM SULFATE, 100MM CITRATE BUFFER, PH 5.5 AT ROOM TEMPERATURE.\\, pH 6.5

Crystal Properties
Matthews coefficient	Solvent content
2.2	52.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.38	α = 90
b = 86.34	β = 90
c = 65.58	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	296	IMAGE PLATE	RIGAKU RAXIS IIC	COLLIMATOR	1995-06-25	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)	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	1.8	52.22	88.6	0.109	0.073	5	4.3		20855		1	11.6

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	1.8	1.86	74.7		0.27	0.22	1.9	2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	PDB ENTRY 1TTA	1.9	5	2	16842	1009	89.3	0.219	0.219	0.299	RANDOM	22.6

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
x_dihedral_angle_d	25.9
x_angle_deg	1.87
x_scangle_it	1.58
x_improper_angle_d	1.57
x_mcangle_it	1.41
x_scbond_it	1.41
x_mcbond_it	1.22
x_bond_d	0.011
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1954
Nucleic Acid Atoms
Solvent Atoms	71
Heterogen Atoms

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
bioteX	data reduction
bioteX	data scaling
X-PLOR	phasing