1CR7

PEANUT LECTIN-LACTOSE COMPLEX MONOCLINIC FORM

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2PEL

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	SMALL TUBES	4.6	293	PURE PROTEIN EXTENSIVELY DIALYSED AGAINST SODIUM ACETATE BUFFER AT PH 4.6 WAS USED IN THE CRYSTALLIZATION TRIALS. CRYSTALS WERE OBTAINED BY THE BATCH METHOD USING 4-5 MG/ML PROTEIN IN 0.05 M SODIUM ACETATE BUFFER CONTAINING 0.2 M SODIUM CHLORIDE, 1.5 MM LACTOSE AND 0.05 %SODIUM AZIDE. THE PRECIPITANT USED WAS PEG 8000, A SOLUTION OF WHICH IN THE SAME BUFFER WAS ADDED TO A FINAL CONCENTRATION OF ABOUT 12%. THE TUBES WERE LEFT UNDISTURBED FOR ABOUT TWO WEEKS, BY WHICH TIME CRYSTALS SUITABLE FOR DATA COLLECTION GREW., SMALL TUBES, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.1	60.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 128.32	α = 90
b = 126.82	β = 116.14
c = 85.61	γ = 90

Symmetry
Space Group	P 1 21 1

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	MIRRORS		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200

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	2.6	20	86.3	0.134		4.75		65505			12.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	2PEL	2.6	10	58584	1168	78.9	0.212	0.207	0.272	RANDOM	21.9

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
x_dihedral_angle_d	27.6
x_mcangle_it	10.52
x_mcbond_it	6.67
x_scangle_it	5.72
x_scbond_it	4.06
x_angle_deg	1.7
x_improper_angle_d	1.39
x_bond_d	0.01
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	13944
Nucleic Acid Atoms
Solvent Atoms	703
Heterogen Atoms	85

Software

Software
Software Name	Purpose
AMoRE	phasing
X-PLOR	refinement
XDS	data reduction
DENZO	data reduction
SCALEPACK	data scaling