3CMV

Mechanism of homologous recombination from the RecA-ssDNA/dsDNA structures

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		RecA4 fusion protein mixed with 2 mM AMPPNP and 10 mM MgCl2, pH 7.5, followed by crystallization from 100 mM Bis-Tris-Cl, 7% (w/v) PEG 3350, 100 mM KSCN, 25% (v/v) ethylene glycol, pH 6.5.

Crystal Properties
Matthews coefficient	Solvent content
3.07	59.89

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 176.6	α = 90
b = 189.8	β = 90
c = 424.3	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray					2007-08-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-C		APS	24-ID-C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	4.3	40					87622

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	4.3	20	87622	1810	92.7	0.24351	0.24314	0.26144	RANDOM	220.934

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]
-5.04			5.79		-0.75

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.831
r_dihedral_angle_3_deg	21.654
r_dihedral_angle_4_deg	15.154
r_dihedral_angle_1_deg	6.942
r_scangle_it	2.096
r_mcangle_it	1.676
r_angle_refined_deg	1.616
r_scbond_it	1.235
r_mcbond_it	0.934
r_symmetry_vdw_refined	0.487
r_nbtor_refined	0.318
r_symmetry_hbond_refined	0.279
r_nbd_refined	0.253
r_xyhbond_nbd_refined	0.168
r_chiral_restr	0.098
r_metal_ion_refined	0.043
r_bond_refined_d	0.016
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	70737
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	1024

Software

Software
Software Name	Purpose
REFMAC	refinement