3U10

Tetramerization dynamics of the C-terminus underlies isoform-specific cAMP-gating in HCN channels


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1Q43 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION4.627820% PEG 8000, 0.5M NaCl, 0.1M Citrate buffer (pH 4.6), 10% glycerol, VAPOR DIFFUSION, temperature 278K
Crystal Properties
Matthews coefficientSolvent content
2.4249.21

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 96.73α = 90
b = 96.73β = 90
c = 50.79γ = 90
Symmetry
Space GroupP 4 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDMARMOSAIC 225 mm CCD2010-01-29MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID23-20.8726ESRFID23-2

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.335.0399.80.1289.61114314.314.3
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.32.42100

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT1Q432.332.932105921059253199.490.203770.200410.2715RANDOM25.789
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]
0.010.01-0.02
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg31.378
r_dihedral_angle_3_deg18.303
r_dihedral_angle_4_deg16.291
r_dihedral_angle_1_deg6.159
r_scangle_it5.508
r_scbond_it3.408
r_mcangle_it1.951
r_angle_refined_deg1.899
r_mcbond_it0.989
r_chiral_restr0.123
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg31.378
r_dihedral_angle_3_deg18.303
r_dihedral_angle_4_deg16.291
r_dihedral_angle_1_deg6.159
r_scangle_it5.508
r_scbond_it3.408
r_mcangle_it1.951
r_angle_refined_deg1.899
r_mcbond_it0.989
r_chiral_restr0.123
r_bond_refined_d0.021
r_gen_planes_refined0.008
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1659
Nucleic Acid Atoms
Solvent Atoms86
Heterogen Atoms22

Software

Software
Software NamePurpose
MAR345dtbdata collection
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling