5G03

An unusual natural product primary sulfonamide: synthesis, carbonic anhydrase inhibition and protein x-ray structure of Psammaplin C

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5A6H

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5		150 NL PROTEIN AT 5.5 MG/ML PLUS 120 NL RESERVOIR AND 30 NL SEEDS IN SITTING DROP PLATES. RESERVOIR WAS 2.6 TO 2.8 M AMMONIUM SULFATE PLUS 100 MM TRIS PH 8.5

Crystal Properties
Matthews coefficient	Solvent content
2.09	41.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 41.88	α = 90
b = 41.28	β = 104.11
c = 71.788	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 CCD		2015-11-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	AUSTRALIAN SYNCHROTRON BEAMLINE MX1		Australian Synchrotron	MX1

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	1.35	41.3	95.7	0.07	19.1	7.6		50188

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	1.35	1.37	90.5		0.78	2.4	7.1

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	5A6H	1.35	69.62	47704	2467	95.38	0.12909	0.1275	0.16005	RANDOM	15.29

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]
-0.09		0.03	0.18		-0.09

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.53
r_sphericity_free	30.807
r_dihedral_angle_4_deg	19.113
r_dihedral_angle_3_deg	12.126
r_sphericity_bonded	9.084
r_dihedral_angle_1_deg	6.572
r_rigid_bond_restr	4.438
r_scbond_it	2.669
r_angle_refined_deg	1.862
r_mcangle_it	1.704
r_mcbond_it	1.342
r_mcbond_other	1.334
r_angle_other_deg	1.086
r_chiral_restr	0.109
r_bond_refined_d	0.013
r_gen_planes_refined	0.01
r_gen_planes_other	0.004
r_bond_other_d	0.003
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcangle_other
r_scbond_other
r_scangle_it
r_scangle_other
r_long_range_B_refined
r_long_range_B_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2045
Nucleic Acid Atoms
Solvent Atoms	261
Heterogen Atoms	27

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing