1IWQ

Crystal Structure of MARCKS calmodulin binding domain peptide complexed with Ca2+/Calmodulin

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1QIV	PDB ENTRY 1QIV

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	295	PEG 6000, sodium acetate, calcium chrolide, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.57

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 40.229	α = 90
b = 40.229	β = 90
c = 343.468	γ = 120

Symmetry
Space Group	P 61 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	90	IMAGE PLATE	RIGAKU RAXIS V		2000-05-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL45PX	1.02	SPring-8	BL45PX

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	2	200	95.9	0.079	14.2	7.6	12467	11956			31.55

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)
	2	2.07	98		0.27			1149

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1QIV	2	20	1	11722	11336	569	96.7	0.22513	0.22308	0.26686	RANDOM	38.144

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]
0.75	0.37		0.75		-1.12

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	14.455
r_scangle_it	5.497
r_scbond_it	3.384
r_dihedral_angle_1_deg	3.101
r_mcangle_it	2.31
r_angle_refined_deg	1.653
r_mcbond_it	1.299
r_angle_other_deg	0.87
r_nbd_refined	0.262
r_nbd_other	0.228
r_symmetry_vdw_other	0.216
r_xyhbond_nbd_refined	0.169
r_metal_ion_refined	0.154
r_symmetry_hbond_refined	0.138
r_symmetry_vdw_refined	0.13
r_chiral_restr	0.1
r_bond_refined_d	0.022
r_gen_planes_refined	0.007
r_gen_planes_other	0.003
r_bond_other_d	0.001
r_nbtor_other
r_xyhbond_nbd_other
r_symmetry_hbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1225
Nucleic Acid Atoms
Solvent Atoms	86
Heterogen Atoms	4

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
REFMAC	refinement