2P5Z

The E. coli c3393 protein is a component of the type VI secretion system and exhibits structural similarity to T4 bacteriophage tail proteins gp27 and gp5

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	298	0.1M Hepes pH 7.5, 21% PEG 3350, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.83	56.47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 116.351	α = 90
b = 116.351	β = 90
c = 80.584	γ = 120

Symmetry
Space Group	P 63

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 165 mm		2007-02-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 31-ID	0.97930	APS	31-ID

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	2.6	50	100	0.107	0.095	6.6	15.5	19128	19128

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	2.6	2.69	100		0.753	0.558	2.8	15.7	1892

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	SAD	THROUGHOUT	2.6	47.19	19100	19100	983	99.9	0.219	0.219	0.217	0.264	RANDOM	60.297

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]
1.57	0.78		1.57		-2.35

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.553
r_dihedral_angle_3_deg	20.271
r_dihedral_angle_4_deg	17.154
r_dihedral_angle_1_deg	8.515
r_scangle_it	4.658
r_mcangle_it	4.634
r_scbond_it	3.105
r_mcbond_it	2.896
r_angle_refined_deg	1.874
r_nbtor_refined	0.322

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.553
r_dihedral_angle_3_deg	20.271
r_dihedral_angle_4_deg	17.154
r_dihedral_angle_1_deg	8.515
r_scangle_it	4.658
r_mcangle_it	4.634
r_scbond_it	3.105
r_mcbond_it	2.896
r_angle_refined_deg	1.874
r_nbtor_refined	0.322
r_xyhbond_nbd_refined	0.211
r_symmetry_hbond_refined	0.182
r_nbd_refined	0.16
r_chiral_restr	0.141
r_symmetry_vdw_refined	0.111
r_bond_refined_d	0.011
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2891
Nucleic Acid Atoms
Solvent Atoms	62
Heterogen Atoms

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345	data collection
HKL-2000	data reduction
SHELXD	phasing
SHELXE	model building

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.