4MVI

Crystal structure of an engineered lipocalin (Anticalin US7) in complex with the Alzheimer amyloid peptide Abeta(1-40)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.25	293	30 % (w/v) PEG 4000, 100 mM sodium acetate, pH 5.25, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
1.71	27.94

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.95	α = 90
b = 58.93	β = 90
c = 61.23	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	100	CCD	MARMOSAIC 225 mm CCD	mirrors	2010-05-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.2	0.91841	BESSY	14.2

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	1.7	42.46	99.9	0.055	20.3	6.9	20073	20073		2

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	1.7	1.79	99.9		0.245	0.245	3.1	6.9	2860

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 4MVK	1.7	42.46	20073	20008	1020	99.66	0.1708	0.1687	0.1687	0.2123	RANDOM	29.0034

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]
2.78			-1.27		-1.51

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.264
r_dihedral_angle_4_deg	16.4
r_dihedral_angle_3_deg	16.002
r_dihedral_angle_1_deg	6.906
r_angle_refined_deg	1.96
r_chiral_restr	0.16
r_bond_refined_d	0.02
r_gen_planes_refined	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1496
Nucleic Acid Atoms
Solvent Atoms	81
Heterogen Atoms

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.