MboA with Leu-Ala-Arg peptide substrate and two Fe(II) ions bound


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
in silico modelAlphaFold 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP4.6298MboA crystals were prepared via the hanging drop vapor diffusion method in an Coy anaerobic chamber with an atmosphere of < 5 ppm of O2. Hanging drops were prepared by combining equal volumes of MboA (9 mg/mL) protein solution, reservoir solution (0.6 M lithium sulfate and 0.1 M sodium acetate, pH 4.6), and 0.2 uL of a 1:1000 dilution microseed master stock generated from apo crystals for a total drop volume of 2.2 uL. The Fe(II) + substrate bound structure was prepared by incubating apo crystals with 0.4 uL of 100 mM LAR peptide and 100 mM Fe2+ in 0.1 M sodium acetate, pH 4.6 for two hours prior to looping. Crystals were cryoprotected with the addition of 0.75 uL of 40% glycerol in 0.1 M sodium acetate, pH 4.6 and flash frozen in LN2
Crystal Properties
Matthews coefficientSolvent content
4.2270.84

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 157.094α = 90
b = 157.094β = 90
c = 157.423γ = 90
Symmetry
Space GroupP 43 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray90PIXELDECTRIS PILATUS3 S 6M2025-05-07MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONALS BEAMLINE 8.3.11.11ALS8.3.1

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)Rpim I (All)CC (Half)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.4590.761000.1920.1990.0530.99918.126.3872777
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)Rpim I (All)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.452.51003.0433.1580.8420.5711.427.05

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Cut-off Sigma (F)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)Mean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTFREE R-VALUE2.4590.761.3372681359199.980.16420.16260.16320.19510.195559.45
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]
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d13.8051
f_angle_d0.5396
f_chiral_restr0.0367
f_bond_d0.007
f_plane_restr0.004
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms7344
Nucleic Acid Atoms
Solvent Atoms270
Heterogen Atoms423

Software

Software
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing