5CGN

Structure of quasiracemic Ala-Magainin 2 with a beta amino acid substitution at position 8

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		293	0.1 M Sodium citrate tribasic pH 5.6 35% v/v tert-butanol

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 56.69	α = 90
b = 56.69	β = 90
c = 51.65	γ = 90

Symmetry
Space Group	P 21 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	MARMOSAIC 225 mm CCD		2014-06-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-F	0.979	APS	21-ID-F

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	2.2	40.09	97.6	0.111	12.2	12.92		8711

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	2.2	2.3	99.8		1.36	2.9	14.61

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	4MGP	2.2	40.09	8271	440	97.92	0.18514	0.18187	0.24735	RANDOM	50.467

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]
-0.69			0.08		0.61

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	27.73
r_dihedral_angle_3_deg	18.706
r_long_range_B_other	11.777
r_long_range_B_refined	11.768
r_scangle_other	9.876
r_mcangle_it	6.339
r_mcangle_other	6.336
r_scbond_it	6.277
r_scbond_other	6.272
r_dihedral_angle_1_deg	5.095
r_mcbond_it	4.886
r_mcbond_other	4.878
r_angle_refined_deg	1.932
r_angle_other_deg	1.065
r_chiral_restr	0.127
r_bond_refined_d	0.018
r_gen_planes_refined	0.009
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_dihedral_angle_4_deg
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1303
Nucleic Acid Atoms
Solvent Atoms	31
Heterogen Atoms	2

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing