1ZSX

Crystal Structure Of Human Potassium Channel Kv Beta-subunit (KCNAB2)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1QRQ	1QRQ.pdb

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.2	293	PEG300, sodium/potassium phosphate, sodium chloride, pH 6.2, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.9	57.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 113.231	α = 90
b = 113.231	β = 90
c = 142.505	γ = 90

Symmetry
Space Group	I 4 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	CCD	MARMOSAIC 225 mm CCD		2005-04-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	0.97910	SLS	X10SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.9	44.3	99.7				36582

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	1.9	2	99

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1QRQ.pdb	1.9	44.3	34746	34746	1831	99.55	0.14623	0.14623	0.14478	0.1724	RANDOM	26.597

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]
-1.57			-1.57		3.14

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.329
r_dihedral_angle_4_deg	14.678
r_dihedral_angle_3_deg	13.199
r_scangle_it	6.982
r_dihedral_angle_1_deg	5.354
r_scbond_it	5.244
r_mcangle_it	3.498
r_mcbond_it	3.006
r_angle_refined_deg	1.522
r_mcbond_other	0.89
r_angle_other_deg	0.856
r_symmetry_vdw_other	0.277
r_nbd_refined	0.21
r_symmetry_vdw_refined	0.199
r_nbd_other	0.184
r_nbtor_refined	0.184
r_xyhbond_nbd_refined	0.184
r_symmetry_hbond_refined	0.17
r_chiral_restr	0.092
r_nbtor_other	0.089
r_bond_refined_d	0.015
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2485
Nucleic Acid Atoms
Solvent Atoms	213
Heterogen Atoms	52

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
PHASER	phasing