Experiment: 1MFT

Crystal Structure Of Four-Helix Bundle Model

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1EC5	PDB ENTRY 1EC5

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	291	PEG 300, zinc chloride, bis-tris, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
1.92	35.79

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 25.233	α = 90
b = 54.81	β = 105.08
c = 37.168	γ = 90

Symmetry
Space Group	P 1 21 1

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	ADSC QUANTUM 4	27-pole hybrid wiggler	2001-10-31	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	1.605	NSLS	X25

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.5	50	93.8	0.1	0.1	6.5	2	3444	3229	1	1	25.7

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.5	2.57	97.8		0.217	0.217	3	2	268

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1EC5	2.5	18.21	3229	3199	224	93.4	0.227	0.222	0.222	0.2218	0.266	0.2665	RANDOM	32.1

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]
10.24		-5.93	-3.39		-6.85

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	17.6
c_scangle_it	8.05
c_scbond_it	6.18
c_mcangle_it	3.51
c_mcbond_it	2.31
c_angle_deg	1.1
c_improper_angle_d	0.72
c_bond_d	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	882
Nucleic Acid Atoms
Solvent Atoms	13
Heterogen Atoms	2

Software

Software
Software Name	Purpose
MADNESS	data collection
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement
MADNESS	data reduction