8BAN

Secretagogin (mouse) in complex with its target peptide from SNAP-25

X-RAY DIFFRACTION

---

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.5	277	PEG 3350 (20%), 2 mM CaCl2, 0.1 M Bis-Tris-Propane pH 6.5, 25 mM Tris-HCl pH 8.0, 0.2 M NaI

Crystal Properties
Matthews coefficient	Solvent content
2.24	45.11

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.659	α = 90
b = 121.068	β = 90
c = 126.374	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	110	PIXEL	DECTRIS EIGER X 16M	Toroidal mirrors	2020-02-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX IV BEAMLINE BioMAX	0.97625	MAX IV	BioMAX

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	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	2.35	87.42	99.2	0.098	0.998	11.9	7.3		46202		2.1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.35	2.43	93		0.841	0.529	0.72	2.1	5.9

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	1EMA	2.35	87.42	43747	2364	99.05	0.19722	0.19444	0.24816	RANDOM	48.655

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]
-1.93			1.08		0.85

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.769
r_dihedral_angle_4_deg	19.713
r_dihedral_angle_3_deg	19.204
r_long_range_B_other	9.932
r_long_range_B_refined	9.927
r_scangle_other	6.713
r_dihedral_angle_1_deg	5.425
r_mcangle_it	5.4
r_mcangle_other	5.4
r_scbond_it	4.311
r_scbond_other	4.307
r_mcbond_it	3.653
r_mcbond_other	3.653
r_angle_refined_deg	1.73
r_angle_other_deg	1.053
r_chiral_restr	0.095
r_bond_refined_d	0.015
r_gen_planes_refined	0.007
r_gen_planes_other	0.003
r_bond_other_d	0.002
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_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8006
Nucleic Acid Atoms
Solvent Atoms	359
Heterogen Atoms	8

Software

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