3QC7

The structure of bacteriophage phi29 head fibers has a supercoiled triple repeating helix-turn-helix motif

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.8	298	The gp8.5 fragment crystals were grown in 100mM sodium phosphate at pH ~6.8 and 8% w/v PEG 3000. It took about one week for crystals to appear, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 47.248	α = 90
b = 47.248	β = 90
c = 424.752	γ = 120

Symmetry
Space Group	H 3 2

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	MARMOSAIC 300 mm CCD		2010-01-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-D	0.968	APS	23-ID-D

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	1.52	70	98.6	0.07	0.07	33.4		28649	28649	-3	-3

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)
	1.52	1.57	97.7		0.407	4.6

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	1.52	29.47	27206	27206	1442	98.32	0.19542	0.19542	0.19424	0.21833	RANDOM	22.08

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]
-0.06	-0.03		-0.06		0.08

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.219
r_dihedral_angle_4_deg	16.537
r_dihedral_angle_3_deg	12.96
r_dihedral_angle_1_deg	5.518
r_scangle_it	4.394
r_scbond_it	2.627
r_mcangle_it	1.642
r_angle_refined_deg	1.368
r_mcbond_it	0.895
r_chiral_restr	0.083

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.219
r_dihedral_angle_4_deg	16.537
r_dihedral_angle_3_deg	12.96
r_dihedral_angle_1_deg	5.518
r_scangle_it	4.394
r_scbond_it	2.627
r_mcangle_it	1.642
r_angle_refined_deg	1.368
r_mcbond_it	0.895
r_chiral_restr	0.083
r_bond_refined_d	0.013
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1194
Nucleic Acid Atoms
Solvent Atoms	179
Heterogen Atoms

Software

Software
Software Name	Purpose
Blu-Ice	data collection
SHARP	phasing
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling

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.