1T7H

X-ray structure of [Lys(-2)-Arg(-1)-des(17-21)]-endothelin-1 peptide

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5	291	PEG 4000, isopropanol, sodium citrate, pH 5.0, VAPOR DIFFUSION, HANGING DROP, temperature 291.0K, pH 5.00

Crystal Properties
Matthews coefficient	Solvent content
1.85	33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 30.136	α = 90
b = 53.926	β = 90
c = 19.486	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	MARRESEARCH		2002-09-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM14		ESRF	BM14

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.13	18.3	99.2	0.07				12081

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.13	1.16	99.5

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	AB INITIO PHASING	THROUGHOUT	1.13	10	12054	12054	613	99.2	0.122	0.12	0.134	RANDOM	8.68

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]
0.04			-0.03		-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.313
r_dihedral_angle_3_deg	11.989
r_sphericity_free	8.41
r_dihedral_angle_4_deg	5.892
r_dihedral_angle_1_deg	5.344
r_scangle_it	4.619
r_scbond_it	3.722
r_sphericity_bonded	3.331
r_mcangle_it	2.462
r_mcbond_it	2.184
r_angle_refined_deg	1.93
r_rigid_bond_restr	1.853
r_angle_other_deg	1.036
r_mcbond_other	0.65
r_nbd_other	0.26
r_symmetry_vdw_other	0.249
r_nbd_refined	0.216
r_symmetry_vdw_refined	0.203
r_symmetry_hbond_refined	0.183
r_chiral_restr	0.134
r_xyhbond_nbd_refined	0.134
r_nbtor_other	0.089
r_bond_refined_d	0.021
r_gen_planes_refined	0.008
r_bond_other_d	0.003
r_gen_planes_other	0.001
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	307
Nucleic Acid Atoms
Solvent Atoms	58
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
CCP4	data scaling
SnB	phasing