3HEU

Cyclic residues in alpha/beta-peptide helix bundles: GCN4-pLI side chain sequence on an (alpha-alpha-beta) backbone with a cyclic beta-residue at position 13

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	298	0.2 M magnesium chloride, 0.1 M HEPES pH 7.5, 30% v/v PEG 400, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
1.89	34.89

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 36.764	α = 90
b = 36.764	β = 90
c = 47.054	γ = 90

Symmetry
Space Group	P 4 21 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	BRUKER SMART 6000	confocal mirrors	2008-08-28	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	23.53	99.8	0.072	21.5	10.4		2446

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	98.7		0.342	3.4	4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	PDB ENTRY 3C3G	2	23.53	2321	111	99.75	0.20336	0.20132	0.24542	RANDOM	12.904

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]
0.81			0.81		-1.63

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.913
r_dihedral_angle_3_deg	13.581
r_dihedral_angle_1_deg	5.804
r_scangle_it	3.362
r_scbond_it	2.118
r_angle_refined_deg	1.985
r_mcbond_it	1.392
r_mcangle_it	1.355
r_angle_other_deg	1.234
r_symmetry_vdw_refined	0.288
r_nbd_refined	0.283
r_symmetry_hbond_refined	0.242
r_nbd_other	0.23
r_symmetry_vdw_other	0.212
r_xyhbond_nbd_refined	0.185
r_nbtor_refined	0.169
r_mcbond_other	0.155
r_chiral_restr	0.11
r_nbtor_other	0.089
r_bond_refined_d	0.012
r_gen_planes_refined	0.008
r_bond_other_d	0.005
r_gen_planes_other	0.002
r_dihedral_angle_4_deg
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	277
Nucleic Acid Atoms
Solvent Atoms	36
Heterogen Atoms	25

Software

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