3H1K

Chicken cytochrome BC1 complex with ZN++ and an iodinated derivative of kresoxim-methyl bound

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1BCC	1BCC after further correction/refinement

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.7	277	20MM KMES PH 6.7, 75MM NACL, 10% GLYCEROL, AND 6% PEG4000. The Kresoxim-methyl derivative WAS ADDED to the protein FROM ETHANOLIC SOLUTION. After verifying good diffraction by these crystals, some were transferred to a drop of mother liquor supplemented with glycerol and ~0.2 mM ZnCl2. After 1 week this crystal was flash-cooled for data collection. During analysis of Zn binding presence of the inhibitor was overlooked, and in the primary citation publication the anomalous signal of I in the inhibitor was mistakenly attributed to a second Zn binding site, Zn02. VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
4.06	69.74

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 171.717	α = 90
b = 181.297	β = 90
c = 241.288	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	100	CCD	ADSC QUANTUM 4		1998-01-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL1-5	1.283	SSRL	BL1-5

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	3.48	42.61	89.9	0.204	9.49	8.5	87072	87072		-3	84.8

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	3.48	3.55	65.2		0.99	1.14	6.8	3144

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	RIGID BODY REFINEMENT	THROUGHOUT	1BCC after further correction/refinement	3.48	18	86369	86369	2558	89.7	0.24	0.24	0.239	0.284	RANDOM	110.4

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]
42.14			-32.46		-9.68

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.5
c_scangle_it	2.53
c_mcangle_it	2.43
c_scbond_it	1.47
c_angle_deg	1.4
c_mcbond_it	1.34
c_improper_angle_d	1
c_bond_d	0.009
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	31820
Nucleic Acid Atoms
Solvent Atoms	17
Heterogen Atoms	836

Software

Software
Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing