Experiment: 4JEH

Crystal Structure of Munc18a and Syntaxin1 lacking N-peptide complex

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3C98	pdb entry 3C98

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	298	27% PEG 400, 10 mM EDTA, 10 mM DTT, 224 mM ammonium acetate, and 100 mM sodium acetate , pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.76

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 154.906	α = 90
b = 154.906	β = 90
c = 150.324	γ = 90

Symmetry
Space Group	I 4 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	77	CCD	ADSC QUANTUM 315		2007-10-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1		ALS	8.2.1

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	2.5	62.017	99.8	0.1	0.1	14.4	4.5	31771	31771

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	2.5	2.64	100		0.646	0.646	1.1	4.6	4578

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 3C98	2.5	32.64	31767	31750	1996		0.255	0.1867	0.1843	0.1933	0.2231	0.2348	RANDOM	59.4991

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]
5.9181			5.9181		-11.8361

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	3.19
t_omega_torsion	2.75
t_angle_deg	1.1
t_bond_d	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6248
Nucleic Acid Atoms
Solvent Atoms	69
Heterogen Atoms

Software

Software
Software Name	Purpose
SCALA	data scaling
BUSTER-TNT	refinement
PDB_EXTRACT	data extraction
Blu-Ice	data collection
MOSFLM	data reduction
PHENIX	phasing
BUSTER	refinement