3B32 | pdb_00003b32

Crystal Structure of Calcium-Saturated Calmodulin N-Terminal Domain Fragment, Residues 1-75

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3CLN	PDB ENTRY 3CLN

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	277.15	100 mM Na acetate, 0.01% Na azide, 21.25% PEG 8000, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 277.15K

Crystal Properties
Matthews coefficient	Solvent content
1.97	37.62

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 34.352	α = 90
b = 66.096	β = 90
c = 57.823	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS IV++	Osmic Blue Mirrors	2004-10-06	M	SINGLE WAVELENGTH

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

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	1.45	15.24	97.8	0.049	19.4	3.7	11740	11740

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	1.45	1.53	94.2		0.248	3.3	3.5

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 (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 3CLN	1.6	15.24	8458	8458	418	98.56	0.20069	0.19749	0.2	0.26916	0.26	RANDOM	13.911

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]
0.66			0.32		-0.98

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.387
r_dihedral_angle_4_deg	18.216
r_dihedral_angle_3_deg	13.072
r_dihedral_angle_1_deg	4.592
r_scangle_it	3.962
r_scbond_it	2.379
r_mcangle_it	1.279
r_angle_refined_deg	1.226
r_mcbond_it	0.861
r_symmetry_hbond_refined	0.346
r_nbtor_refined	0.308
r_nbd_refined	0.232
r_xyhbond_nbd_refined	0.136
r_symmetry_vdw_refined	0.131
r_metal_ion_refined	0.089
r_chiral_restr	0.076
r_bond_refined_d	0.012
r_gen_planes_refined	0.004
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_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	575
Nucleic Acid Atoms
Solvent Atoms	106
Heterogen Atoms	2

Software

Software
Software Name	Purpose
CrystalClear	data collection
PHASER	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling