2CJT

Structural Basis for a Munc13-1 Homodimer - Munc13-1 - RIM Heterodimer Switch: C2-domains as Versatile Protein-Protein Interaction Modules

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.5	293	VAPOR DIFFUSION; HANGING DROP; PROTEIN: 12 MG/ML MUNC13-1 IN 30 MM TRIS, 150 MM NACL AND 1 MM TCEP, PH 7.4; RESERVOIR: 0.4 M MAGNESIUM FORMATE, 0.1 M SODIUM ACETATE (PH 4.5); DROP: 1 MICROLITER PROTEIN PLUS 1 MICROLITER RESERVOIR; TEMPERATURE: 20 DEGREES CELSIUS; CRYSTALS APPEARED OVERNIGHT AND GREW TO A FINAL SIZE OF ABOUT 0.05 MM X 0.05 MM X 0.35 MM WITHIN 3 DAYS.

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.558	α = 90
b = 127.144	β = 90.27
c = 50.739	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	CUSTOM		2004-10-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-BM		APS	19-BM

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	1.44	47.12	99.7	0.06	24.1	4.3		99080		-3	14.4

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	1.44	1.47	97.1		0.36	3	2.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	1.44	20	97532	1463	99.7	0.16	0.16	0.188	RANDOM	14.17

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]
-0.17		-0.05	0.08		0.09

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.534
r_dihedral_angle_4_deg	17.701
r_dihedral_angle_3_deg	13.023
r_dihedral_angle_1_deg	7.231
r_scangle_it	3.841
r_scbond_it	2.894
r_angle_refined_deg	1.842
r_mcangle_it	1.826
r_mcbond_it	1.612
r_angle_other_deg	0.921
r_symmetry_vdw_other	0.253
r_nbd_refined	0.242
r_nbd_other	0.197
r_symmetry_vdw_refined	0.197
r_symmetry_hbond_refined	0.186
r_nbtor_refined	0.174
r_xyhbond_nbd_refined	0.173
r_chiral_restr	0.124
r_nbtor_other	0.088
r_bond_refined_d	0.02
r_gen_planes_refined	0.009
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
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	3958
Nucleic Acid Atoms
Solvent Atoms	641
Heterogen Atoms	125

Software

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