2QGC

Human transthyretin (TTR) complexed with 2-(3,5-Dimethyl-4-hydroxyphenyl)benzoxazole

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.5	298	The WT-TTR was concentrated to 4 mg/mL in 10 mM NaPi, 100 mM KCl, at pH 7.6 and co-crystallized at room temperature with inhibitors using the vapor-diffusion sitting drop method. Crystals were grown from 1.395 M sodium citrate, 3.5% v/v glycerol at pH 5.5. The crystals were frozen using a cryo-protectant solution of 1.395 M sodium citrate, pH 5.5, containing 10% v/v glycerol., VAPOR DIFFUSION, SITTING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
2.35	42.67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43	α = 90
b = 85.412	β = 90
c = 64.424	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		CCD	MARMOSAIC 325 mm CCD	Flat mirror (vertical focusing); single crystal Si(111) bent monochromator (ho rizontal focusing)	2007-01-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.9791	SSRL	BL11-1

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	1.3	50	99.9	0.036	13.9	7.1		59153			14.1

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	1.3	1.35	100		0.558	0.558	3.75	7	5841

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	Human Transthyretin PDB 2FBR	1.3	50	56119	59106	2987	99.74	0.42	0.154	0.174	RANDOM	13.555

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]
-0.23			0.07		0.16

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.394
r_dihedral_angle_4_deg	19.259
r_dihedral_angle_3_deg	14.163
r_sphericity_free	9.923
r_dihedral_angle_1_deg	6.171
r_sphericity_bonded	5.559
r_scangle_it	5.398
r_scbond_it	4.252
r_mcangle_it	3.067
r_mcbond_it	2.544
r_rigid_bond_restr	2.024
r_angle_refined_deg	1.72
r_mcbond_other	1.016
r_angle_other_deg	0.964
r_symmetry_vdw_other	0.245
r_nbd_refined	0.208
r_nbd_other	0.203
r_symmetry_vdw_refined	0.201
r_nbtor_refined	0.182
r_xyhbond_nbd_refined	0.154
r_symmetry_hbond_refined	0.15
r_chiral_restr	0.112
r_nbtor_other	0.09
r_bond_refined_d	0.019
r_gen_planes_refined	0.009
r_bond_other_d	0.002
r_gen_planes_other	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1773
Nucleic Acid Atoms
Solvent Atoms	196
Heterogen Atoms	36

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
PHASER	phasing