1JOT

STRUCTURE OF THE LECTIN MPA COMPLEXED WITH T-ANTIGEN DISACCHARIDE

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		STRUCTURE OBTAINED FROM MAD

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.5		CONVENTIONAL VAPOR DIFFUSION OF SITTING DROP. 1.0M OF LITHIUM SULFATE BUFFERED WITH 0.2 SODIUM CITRATE AT PH4.5 IN RESERVOIR DROPS MADE OF 15 MICROLITERS OF PROTEIN SOLUTION (10.0 MG/ML) AND EQUAL VOLUMN OF RESERVOIR SOLUTION. ROOM TEMPERATURE., vapor diffusion - sitting drop

Crystal Properties
Matthews coefficient	Solvent content
2.83	56

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 67.6	α = 90
b = 67.6	β = 90
c = 149.26	γ = 120

Symmetry
Space Group	P 64 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	300	AREA DETECTOR	XUONG-HAMLIN MULTIWIRE		1991-07-25	M

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

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	2.2	30	93.9999	0.036	7.84	9.6		10135		2

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	2.2	3.99

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	STRUCTURE OBTAINED FROM MAD	2.2	6	2	9636	516	93.9	0.172	0.172	0.222	YES

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	29.34
x_angle_deg	1.302
x_improper_angle_d	0.656
x_bond_d	0.006
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
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1166
Nucleic Acid Atoms
Solvent Atoms	91
Heterogen Atoms	26

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
SOFTWARE	data reduction
HAMLIN	data scaling
X-PLOR	phasing