1GZI

CRYSTAL STRUCTURE OF TYPE III ANTIFREEZE PROTEIN FROM OCEAN POUT, AT 1.8 ANGSTROM RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.6		50% AMMONIUM SULFATE, 0.1M SODIUM ACETATE, PH 5.6

Crystal Properties
Matthews coefficient	Solvent content
2.06	39.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 32.55	α = 90
b = 39.3	β = 90
c = 45.52	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	293	IMAGE PLATE	MARRESEARCH		1996-07-18	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.8	15	99.7	0.065	6.3	3.6		5155			21.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.8	1.9	100		0.208	3.2	3.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MIR	1.8	15	5709		99.7	0.174	0.233	RANDOM	25.3

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
p_staggered_tor	17.6
p_transverse_tor	7.2
p_scangle_it	6.02
p_planar_tor	5.1
p_scbond_it	4.01
p_mcangle_it	2.02
p_mcbond_it	1.35
p_multtor_nbd	0.255
p_singtor_nbd	0.19
p_chiral_restr	0.172
p_planar_d	0.035
p_angle_d	0.029
p_bond_d	0.011
p_angle_deg
p_hb_or_metal_coord
p_plane_restr
p_xhyhbond_nbd
p_xyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	483
Nucleic Acid Atoms
Solvent Atoms	54
Heterogen Atoms

Software

Software
Software Name	Purpose
CCP4	model building
REFMAC	refinement
DENZO	data reduction
CCP4	data scaling
CCP4	phasing