3ZIA

The structure of F1-ATPase from Saccharomyces cerevisiae inhibited by its regulatory protein IF1

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICROBATCH	7.5	296	ACTIVE F1-ATPASE (12 MG/ML) WAS EXCHANGED ON A DESALTING COLUMN INTO CRYSTALLISATION BUFFER, PREPARED IN D2O CONSISTING OF 100 MM BIS-TRIS PROPANE, PH 7.5, 100 MM SUCROSE, 1 MM ADP AND 10 MM MAGNESIUM SULPHATE. THEN THE ENZYME WAS INHIBITED AT 23C WITH A 4-FOLD MOLAR EXCESS OF YI1-53 (MUTATION E21A) IN THE PRESENCE OF 1 MM ATP AND 2 MM MAGNESIUM SULPHATE. FURTHER PORTIONS (5 UL OF A NEUTRALISED STOCK SOLUTION CONTAINING 200 MM ATP AND 400 MM MAGNESIUM SULPHATE/ML PROTEIN SOLUTION) WERE ADDED AFTER 5 AND 10 MIN. MORE THAN 95% OF THE ATP HYDROLYSIS ACTIVITY OF THE ENZYME WAS INHIBITED. SODIUM-POTASSIUM TARTRATE WAS ADDED TO 100 MM, AND THE CONCENTRATION OF THE PROTEIN SOLUTION WAS ADJUSTED TO 10 MG/ML WITH CRYSTALLISATION BUFFER. CRYSTALS WERE GROWN AT 23C IN 72 WELL MICRO-BATCH PLATES UNDER FILTERED PARAFFIN OIL. THE CRYSTALLISATION DROPS (4 UL) CONTAINED A 1:1 MIXTURE OF PROTEIN SOLUTION AND PRECIPITANT SOLUTION (20%-26% POLYETHYLENE GLYCOL 3000 AND 600 MM NACL PREPARED IN D2O).

Crystal Properties
Matthews coefficient	Solvent content
2.66	53.72

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 118.224	α = 90
b = 187.846	β = 89.96
c = 181.812	γ = 90

Symmetry
Space Group	P 1 21 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	MARRESEARCH		2009-10-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I24		Diamond	I24

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	2.5	43.84	98.4	0.11	8.7	3.9		268620		3

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	2.5	2.64	97.6		0.75	2	3.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	PDB ENTRY 2HLD	2.5	181.81	254974	13570	98.25	0.22618	0.2243	0.26194	RANDOM	60.332

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]
0.18		0.46	0.66		-0.84

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.082
r_dihedral_angle_4_deg	16.409
r_dihedral_angle_3_deg	16.365
r_dihedral_angle_1_deg	5.472
r_scangle_it	4.592
r_scbond_it	2.688
r_angle_refined_deg	1.175
r_mcangle_it	1.084
r_mcbond_it	0.576
r_chiral_restr	0.075
r_bond_refined_d	0.009
r_gen_planes_refined	0.004
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	50724
Nucleic Acid Atoms
Solvent Atoms	773
Heterogen Atoms	366

Software

Software
Software Name	Purpose
REFMAC	refinement
iMOSFLM	data reduction
SCALA	data scaling
PHASER	phasing