1N0Q

3ANK: A designed ankyrin repeat protein with three identical consensus repeats

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4ANK

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	293	HEPES, MPD, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.27	45.83

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 39.636	α = 90
b = 43.159	β = 90
c = 105.574	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	77	CCD	ADSC QUANTUM 210		2002-03-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1	1.000	ALS	8.3.1

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	1.26	19.96	99.52	0.087	11.8		43548	41302

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	4ANK	1.26	19.96	1	43548	41302	2246	97.52	0.17136	0.17218	0.17136	0.18731	RANDOM	12.618

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]
0.98			-0.1		-0.88

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	4.985
r_scangle_it	4.336
r_scbond_it	2.742
r_mcangle_it	1.415
r_angle_refined_deg	1.405
r_mcbond_it	0.752
r_symmetry_hbond_refined	0.254
r_xyhbond_nbd_refined	0.239
r_nbd_refined	0.226
r_symmetry_vdw_refined	0.143

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	4.985
r_scangle_it	4.336
r_scbond_it	2.742
r_mcangle_it	1.415
r_angle_refined_deg	1.405
r_mcbond_it	0.752
r_symmetry_hbond_refined	0.254
r_xyhbond_nbd_refined	0.239
r_nbd_refined	0.226
r_symmetry_vdw_refined	0.143
r_chiral_restr	0.081
r_bond_refined_d	0.011
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1388
Nucleic Acid Atoms
Solvent Atoms	183
Heterogen Atoms	6

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
EPMR	phasing
REFMAC	refinement
CCP4	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.