Experiment: 1YU8

Crystal Structure of the R37A Mutant of Villin Headpiece

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		bromine phased model of wild type HP67

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	298	0.2 M ammonium Sulfate, 0.1 M sodium cacodylate (pH 6.5) and 30 % polyethylene glycol (PEG) 8,000, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.37

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 31.382	α = 90
b = 37.543	β = 90
c = 53.529	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	95	IMAGE PLATE	RIGAKU RAXIS IV		2004-06-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE		1.5418

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	1.45	100	99.2	0.054	0.054	24.4	4.3	11713	11624			18.1

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)
	1.45	1.5	96.2		0.136	0.136	8.8	3.4	1099

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 (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	bromine phased model of wild type HP67	1.45	15.51	11713	11624	936	99.3	0.205	0.192	0.197	0.211	Random	15.4

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]
-1.14			1.86		-0.72

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.1
c_scangle_it	2.06
c_scbond_it	1.47
c_mcangle_it	1.39
c_angle_deg	1.3
c_improper_angle_d	0.9
c_mcbond_it	0.87
c_bond_d	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	508
Nucleic Acid Atoms
Solvent Atoms	92
Heterogen Atoms

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	phasing