Experiment: 4PXU

Structural basis for the assembly of the mitotic motor kinesin-5 into bipolar tetramers

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4PXT	pdb entry 4PXT

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		293	4-6 % (+/-) 2-Methyl-2,4 pentanediol (MPD), 100mM MES, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.03	59.38

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 138.648	α = 90
b = 138.648	β = 90
c = 105.792	γ = 120

Symmetry
Space Group	P 64 2 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	PIXEL	DECTRIS PILATUS 6M	K-B focusing mirrors	2013-03-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL12-2	0.9795	SSRL	BL12-2

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	2.601	40.024	83.84	0.099	0.111	10.8	8.2	18960	15885	1.36	2.3	75.9

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	2.6	2.74	99.9		0.989	0.966	2.3	8.5	2694

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	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	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 4PXT	2.601	40.024	2.3	1.36	18960	15885	785	83.84	0.2244	0.2229	0.2291	0.252	0.2541	RANDOM	80.55

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]
-2.65			-2.65		5.3

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	15.583
f_angle_d	0.862
f_chiral_restr	0.033
f_bond_d	0.006
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2287
Nucleic Acid Atoms
Solvent Atoms	60
Heterogen Atoms	8

Software

Software
Software Name	Purpose
MAR345dtb	data collection
PHASER	phasing
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling