Experiment: 1GMK

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1C4D	GRAMICIDIN/CSCL COMPLEX, THEN GRAMICIDIN/CSSCN COMPLEX, BOTH WITHOUT IONS

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				CRYSTALLIZED IN METHANOL

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 32.06	α = 90
b = 51.8	β = 90
c = 31.04	γ = 90

Symmetry
Space Group	P 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	293	DIFFRACTOMETER	ENRAF-NONIUS FAST		1991-10-11	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SEALED TUBE	ENRAF-NONIUS

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	2.5	10	73.3	0.0325		2		5476		3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	GRAMICIDIN/CSCL COMPLEX, THEN GRAMICIDIN/CSSCN COMPLEX, BOTH WITHOUT IONS	2.5	10	3	2241		83.3	0.192	0.192

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]

RMS Deviations
Key	Refinement Restraint Deviation
x_dihedral_angle_d	28.14
x_angle_deg	1.78
x_improper_angle_d	1.57
x_bond_d	0.011
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	517
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	66

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
CADRAL	data reduction
SHELX76	data scaling
X-PLOR	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.