4M4W | pdb_00004m4w

Mechanistic implications for the bacterial primosome assembly of the structure of a helicase-helicase loader complex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	8	290	11-13% w/v PEG3350, 0.2 M lithium sulfate, 50 mM TRIS, pH 8.0-8.3, VAPOR DIFFUSION, temperature 290K

Crystal Properties
Matthews coefficient	Solvent content
4.79	74.29

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 229.055	α = 90
b = 229.055	β = 90
c = 364.294	γ = 120

Symmetry
Space Group	P 31 2 1

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	mirrors	2010-03-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-C	0.97918	APS	24-ID-C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	6	50	95.3	0.175	3.7	3.1	26476	26476	1	1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	6	6.21	90.7		1	0.5	2.5	2472

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	6.1	20	17944	17944	974	72.27	0.37968	0.37906	0.3834	0.39154	0.3952	RANDOM	140.281

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]
-0.04	-0.02		-0.04		0.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.392
r_dihedral_angle_3_deg	21.256
r_dihedral_angle_4_deg	15.742
r_dihedral_angle_1_deg	7.094
r_angle_refined_deg	1.39
r_mcangle_it	0.315
r_scangle_it	0.227
r_mcbond_it	0.175
r_scbond_it	0.121
r_chiral_restr	0.089
r_bond_refined_d	0.008
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	31981
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
CBASS	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling