3CBR

Crystal structure of human Transthyretin (TTR) at pH3.5

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	3.5	289	5-7 mg/ml protein, 0.1 M sodium acetate, 20 % PEG 3350, 0.3-0.5 M ammonium sulfate equilibrated against 2.0M ammonium sulfate, pH 3.5, VAPOR DIFFUSION, HANGING DROP, temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
2.09	41.09

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.124	α = 90
b = 85.494	β = 90
c = 62.419	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 4		2003-07-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 14-BM-C	0.9	APS	14-BM-C

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	1.63	35.58	98.2	0.054	19.36		29348	29348

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)
	1.63	1.65	88.6		0.69	2.69

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 1BMZ	1.7	35.58	24412	24412	1314	98.49	0.22472	0.22472	0.22284	0.26048	RANDOM	23.883

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]
-0.1			-0.19		0.29

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.846
r_dihedral_angle_3_deg	13.811
r_dihedral_angle_4_deg	9.807
r_dihedral_angle_1_deg	5.725
r_scangle_it	2.914
r_scbond_it	1.738
r_mcangle_it	1.251
r_angle_refined_deg	1.081
r_mcbond_it	0.749
r_nbtor_refined	0.304
r_nbd_refined	0.185
r_symmetry_hbond_refined	0.181
r_symmetry_vdw_refined	0.166
r_xyhbond_nbd_refined	0.129
r_chiral_restr	0.075
r_bond_refined_d	0.007
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1609
Nucleic Acid Atoms
Solvent Atoms	254
Heterogen Atoms

Software

Software
Software Name	Purpose
EPMR	phasing
REFMAC	refinement
ADSC	data collection
HKL-2000	data reduction
SCALEPACK	data scaling