3CRP

A heterospecific leucine zipper tetramer

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2NRN	PDB ENTRY 2NRN

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9.8	295	0.1M Tris-HCl, 0.05M magnesium chloride, 13% PEG 4000, pH 9.8, VAPOR DIFFUSION, HANGING DROP, temperature 295.0K

Crystal Properties
Matthews coefficient	Solvent content
2.22	44.67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 79.473	α = 90
b = 79.473	β = 90
c = 54.947	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	IMAGE PLATE	MAR scanner 345 mm plate		2006-05-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X4A	0.9795	NSLS	X4A

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	1.7	25.1	99.4	0.055	15.2	9.2	19756	19756			24.2

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	1.7	1.74	99.9		0.556	4.9	9	1281

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	PDB ENTRY 2NRN	1.7	25.1	19756	19756	1012	99.4	0.20419	0.20419	0.20274	0.23045	RANDOM	37.345

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]
-0.44			-0.44		0.89

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.153
r_dihedral_angle_4_deg	19.252
r_dihedral_angle_3_deg	15.461
r_scangle_it	4.938
r_dihedral_angle_1_deg	3.664
r_scbond_it	2.941
r_angle_refined_deg	1.534
r_mcangle_it	1.526
r_mcbond_it	0.873
r_symmetry_metal_ion_refined	0.495
r_nbtor_refined	0.3
r_metal_ion_refined	0.295
r_nbd_refined	0.243
r_symmetry_vdw_refined	0.235
r_symmetry_hbond_refined	0.199
r_xyhbond_nbd_refined	0.177
r_chiral_restr	0.103
r_bond_refined_d	0.017
r_gen_planes_refined	0.007
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_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	1256
Nucleic Acid Atoms
Solvent Atoms	130
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345dtb	data collection
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing