4GV5

X-ray structure of crotamine, a cell-penetrating peptide from the Brazilian snake Crotalus durissus terrificus

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.1	293	0.2 M sodium thiocyanate, 1.9 M ammonium sulphate, pH 6.1, VAPOR DIFFUSION, HANGING DROP, temperature 293.0K

Crystal Properties
Matthews coefficient	Solvent content
3.47	64.51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 66.922	α = 90
b = 74.33	β = 90
c = 80.199	γ = 90

Symmetry
Space Group	I 21 21 21

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	RAYONIX MX225HE			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, EMBL c/o DESY BEAMLINE P14 (MX2)		PETRA III, EMBL c/o DESY	P14 (MX2)

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.7	10	97.7			22612	20890	2.5	1

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 (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	1.7	10	16628	20890	1121	98.24	0.1699	0.16694	0.17	0.22537	0.22	RANDOM	43.727

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]
-0.67			-0.86		1.53

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_bonded	36.112
r_sphericity_free	27.031
r_dihedral_angle_2_deg	23.802
r_dihedral_angle_4_deg	22.576
r_dihedral_angle_3_deg	18.43
r_rigid_bond_restr	11.826
r_dihedral_angle_1_deg	6.475
r_angle_refined_deg	2.856
r_chiral_restr	0.196
r_bond_refined_d	0.034
r_gen_planes_refined	0.012
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
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_mcbond_it
r_mcbond_other
r_mcangle_it
r_scbond_it
r_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1014
Nucleic Acid Atoms
Solvent Atoms	62
Heterogen Atoms	51

Software

Software
Software Name	Purpose
HKL-2000	data collection
AutoSol	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling