3CP7

Crystal structure of a thermostable serine protease AL20 from extremophilic microoganism

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1P3E

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.9	294	2.9M sodium formate, 0.1M sodium citrate, pH 6.9, VAPOR DIFFUSION, HANGING DROP, temperature 294K

Crystal Properties
Matthews coefficient	Solvent content
2.46	50.02

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 92.26	α = 90
b = 92.26	β = 90
c = 137.88	γ = 120

Symmetry
Space Group	H 3

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	MAR CCD 130 mm	mirror	2002-01-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I711	1.076	MAX II	I711

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.39	19.8	98	0.049	0.047	14.5	3.3	88125	86325			18.16

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.39	1.44	89.4		0.193	0.193	3.5	3	8921

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	1P3E	1.39	19.18	86325	84142	2161	97.5	0.17887	0.17887	0.17834	0.19904	RANDOM	14.788

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
r_dihedral_angle_2_deg	33.033
r_dihedral_angle_3_deg	12.091
r_dihedral_angle_4_deg	8.435
r_dihedral_angle_1_deg	7.286
r_scangle_it	2.183
r_scbond_it	1.49
r_angle_refined_deg	1.314
r_mcangle_it	1.068
r_mcbond_it	0.616
r_nbtor_refined	0.308
r_nbd_refined	0.215
r_symmetry_vdw_refined	0.175
r_chiral_restr	0.174
r_xyhbond_nbd_refined	0.129
r_symmetry_hbond_refined	0.126
r_bond_refined_d	0.008
r_gen_planes_refined	0.005
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3208
Nucleic Acid Atoms
Solvent Atoms	663
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345dtb	data collection
XDS	data reduction
XSCALE	data scaling
MOLREP	phasing