3ETQ

X-ray structure of cysteine-free fragment of mHCN2 C-terminal region from amino acids 443-630 including C508N, C584S, and C601S mutations

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5	277	16% w/v PEG 6000, 500 mM NaCl, 10% glycerol, 100 mM citrate, pH 5.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.77	55.53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 95.752	α = 90
b = 95.752	β = 90
c = 115.223	γ = 90

Symmetry
Space Group	P 4 21 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	ADSC QUANTUM 315		2004-09-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.1	ALS	8.2.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.9	30	99.5	0.058	66.615	27.3		42653

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.9	1.97	95.4		0.296	8.6	19.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 1q5o	1.9	30	42629	2149	99.5	0.183	0.182	0.216	21.54

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]
0.22			0.22		-0.43

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.366
r_dihedral_angle_4_deg	14.52
r_dihedral_angle_3_deg	13.47
r_dihedral_angle_1_deg	5.812
r_scangle_it	4.013
r_scbond_it	2.744
r_mcangle_it	1.648
r_mcbond_it	1.055
r_angle_refined_deg	0.864
r_nbtor_refined	0.315
r_symmetry_hbond_refined	0.299
r_xyhbond_nbd_refined	0.28
r_nbd_refined	0.217
r_symmetry_vdw_refined	0.172
r_chiral_restr	0.067
r_gen_planes_refined	0.009
r_bond_refined_d	0.005
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3161
Nucleic Acid Atoms
Solvent Atoms	541
Heterogen Atoms	44

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data scaling