1S5E

Cholera holotoxin, Crystal form 1

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		298	PEG 3350, magnesium acetate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.42	48.86

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 59.931	α = 90
b = 108.23	β = 95.89
c = 122.976	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	100	CCD	ADSC QUANTUM 315		2002-11-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.2	1.0781	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	1.9	49.39	99.1	0.083	14.5	3.6	122327	122327

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	1.9	1.97	97.1		0.391	2.85		11923

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	CTY30S Form 3 structure (PDB ID 1S5B)	1.9	40.82	116190	116190	6126	98.88	0.16904	0.16904	0.16716	0.20521	RANDOM	13.109

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]
-0.05		-0.13	0.14		-0.11

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.531
r_scangle_it	2.3
r_mcangle_it	1.874
r_scbond_it	1.447
r_angle_refined_deg	1.41
r_mcbond_it	1.157
r_angle_other_deg	0.787
r_symmetry_vdw_other	0.371
r_nbd_other	0.267
r_symmetry_vdw_refined	0.267
r_nbd_refined	0.217
r_xyhbond_nbd_refined	0.17
r_symmetry_hbond_refined	0.158
r_metal_ion_refined	0.12
r_chiral_restr	0.104
r_nbtor_other	0.09
r_bond_refined_d	0.013
r_gen_planes_refined	0.007
r_gen_planes_other	0.007
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11664
Nucleic Acid Atoms
Solvent Atoms	748
Heterogen Atoms	26

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
MOLREP	phasing