4C3V

Extensive counter-ion interactions with subtilisin in aqueous medium, no Cs soak

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				SUBTILISIN CARLSBERG WAS PURCHASED FROM SIGMA (PRODUCT CODE: P5380) AND USED FOR CRYSTALLIZATION WITHOUT FURTHER PURIFICATION. THE PROTEIN POWDER WAS DISSOLVED IN 330 MM NA CACODYLATE BUFFER AT PH 5.6 TO A CONCENTRATION OF 10 MG/ML. SUBTILISIN WAS CRYSTALLIZED BY THE BATCH METHOD FROM BUFFER SOLUTION SATURATED WITH NA2SO4 13% (W/V) AS PRECIPITANT1. LONG NEEDLE-LIKE CRYSTALS GREW OVER A PERIOD OF TWO WEEKS TO TYPICAL DIMENSIONS 50 X 50 X 400 UM X UM X UM.

Crystal Properties
Matthews coefficient	Solvent content
1.98	37.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.891	α = 90
b = 55.075	β = 90
c = 75.311	γ = 90

Symmetry
Space Group	P 21 21 21

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	MARMOSAIC 225 mm CCD		2005-06-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX10.1		SRS	PX10.1

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	2.26	50	100	0.07	55.61	10.1		10628		2

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	2.26	2.34	100		0.24	14.3	8.5

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	PDB ENTRY 2WUW	2.26	33.76	10078	511	99.69	0.16274	0.1596	0.22581	RANDOM	24.747

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]
0.26			-0.19		-0.07

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.415
r_dihedral_angle_3_deg	15.42
r_dihedral_angle_4_deg	14.775
r_dihedral_angle_1_deg	6.117
r_mcangle_it	2.381
r_angle_refined_deg	1.84
r_mcbond_it	1.682
r_chiral_restr	0.121
r_bond_refined_d	0.016
r_gen_planes_refined	0.008
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
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_mcbond_other
r_mcangle_other
r_scbond_it
r_scbond_other
r_scangle_it
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1920
Nucleic Acid Atoms
Solvent Atoms	120
Heterogen Atoms	19

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling