3C3F

alpha/beta-Peptide helix bundles: The GCN4-pLI side chain sequence on an (alpha-alpha-alpha-beta) backbone

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	298	0.2 M ammonium sulfate, 0.1 M Tris pH 8.5, 30% v/v PEG 550 monomethyl ether, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
1.77	30.36

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 35.237	α = 90
b = 35.23	β = 90.87
c = 47.309	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	BRUKER SMART 6000	confocal mirrors	2007-10-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	BRUKER AXS MICROSTAR	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	47.3	98.2	0.078	17	8.6	8037	7896

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.1	90.1		0.29	3.8	3

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	2	25	7520	362	98.24	0.18881	0.18507	0.2648	RANDOM	12.77

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]
0.43		0.08	0.75		-1.18

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	43.033
r_dihedral_angle_3_deg	14.607
r_dihedral_angle_4_deg	10.101
r_scangle_it	3.879
r_dihedral_angle_1_deg	3.534
r_scbond_it	2.354
r_angle_refined_deg	1.745
r_angle_other_deg	1.177
r_mcangle_it	1.142
r_mcbond_it	0.689
r_symmetry_vdw_other	0.259
r_symmetry_hbond_refined	0.235
r_nbd_other	0.219
r_symmetry_vdw_refined	0.201
r_nbd_refined	0.187
r_xyhbond_nbd_refined	0.185
r_nbtor_refined	0.17
r_mcbond_other	0.163
r_chiral_restr	0.11
r_nbtor_other	0.082
r_bond_refined_d	0.011
r_gen_planes_refined	0.008
r_bond_other_d	0.002
r_gen_planes_other	0.001
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_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1077
Nucleic Acid Atoms
Solvent Atoms	151
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
PROTEUM PLUS	data collection
PROTEUM PLUS	data reduction
PROTEUM PLUS	data scaling
PHASER	phasing