3UYU

Structural basis for the antifreeze activity of an ice-binding protein (LeIBP) from Arctic yeast

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.5	292	0.1M sodium acetate, pH 4.5, 1.2M ammonium sulfate, 0.2M NaCl, VAPOR DIFFUSION, HANGING DROP, temperature 292K

Crystal Properties
Matthews coefficient	Solvent content
2.53	51.4

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.58	α = 90
b = 97.58	β = 90
c = 106.61	γ = 90

Symmetry
Space Group	P 43 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	200	CCD	ADSC QUANTUM 270		2011-06-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE AR-NE3A	0.98227	Photon Factory	AR-NE3A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.57	36	99.4			71952	71520	1	1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.57	1.66	98.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	SAD	THROUGHOUT	1.57	31.59	71520	67692	3614	99.48	0.21824	0.21774	0.21597	0.25073	RANDOM	15.605

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
r_dihedral_angle_2_deg	33.15
r_dihedral_angle_4_deg	16.981
r_dihedral_angle_3_deg	14.645
r_dihedral_angle_1_deg	6.81
r_scangle_it	5.296
r_scbond_it	3.701
r_angle_refined_deg	2.257
r_mcangle_it	2.071
r_mcbond_it	1.27
r_chiral_restr	0.308

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.15
r_dihedral_angle_4_deg	16.981
r_dihedral_angle_3_deg	14.645
r_dihedral_angle_1_deg	6.81
r_scangle_it	5.296
r_scbond_it	3.701
r_angle_refined_deg	2.257
r_mcangle_it	2.071
r_mcbond_it	1.27
r_chiral_restr	0.308
r_bond_refined_d	0.026
r_gen_planes_refined	0.013

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3341
Nucleic Acid Atoms
Solvent Atoms	458
Heterogen Atoms	12

Software

Software
Software Name	Purpose
HKL-2000	data collection
SOLVE	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	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 R01GM157729.