1PZJ

Cholera Toxin B-Pentamer Complexed With Nitrophenyl Galactoside 5

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	298	42% PEG 350, 50 mM NaCl, 100 mM Tris-HCl pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
1.81	31.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 101.754	α = 90
b = 65.998	β = 105.44
c = 77.362	γ = 90

Symmetry
Space Group	C 1 2 1

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	ADSC QUANTUM 315		2002-03-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.2	0.9800	ALS	8.2.2

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	1.46	99	98.5	0.048	19.74	3.18	85036	85036			13.821

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.46	1.51	93.2		0.115	8.601	2.46	8013

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	3CHB	1.46	19.69	85036	80755	4274	98.91	0.1174	0.1174	0.11515	0.15925	RANDOM	11.474

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]
-0.02		0.02	-0.01		0.05

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	21.284
r_dihedral_angle_1_deg	6.914
r_scangle_it	6.726
r_sphericity_bonded	6.274
r_scbond_it	4.971
r_mcangle_it	3.207
r_rigid_bond_restr	2.462
r_mcbond_it	2.299
r_angle_refined_deg	1.485
r_angle_other_deg	1.111
r_nbd_other	0.28
r_symmetry_vdw_other	0.262
r_nbd_refined	0.228
r_symmetry_vdw_refined	0.19
r_symmetry_hbond_refined	0.19
r_xyhbond_nbd_refined	0.174
r_nbtor_other	0.099
r_chiral_restr	0.095
r_gen_planes_other	0.018
r_bond_refined_d	0.011
r_gen_planes_refined	0.011
r_bond_other_d	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4095
Nucleic Acid Atoms
Solvent Atoms	650
Heterogen Atoms	185

Software

Software
Software Name	Purpose
REFMAC	refinement
TRUNCATE	data reduction
XTALVIEW	refinement
HKL-2000	data collection
HKL-2000	data reduction
CCP4	data scaling