3CX5

Structure of complex III with bound cytochrome c in reduced state and definition of a minimal core interface for electron transfer.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1KB9	PDB entries 1KB9 and 1YCC
experimental model	PDB	1YCC	PDB entries 1KB9 and 1YCC

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	Microbatch (paraffin oil)	7.5	277	1M Sucrose, 10% DMSO, 20mM Tris pH 7.5, 80mM NaCl, 0.05 % UM, 1 M stigmatellin, 5% PEG 4000, Microbatch (paraffin oil), temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
4.5	72.67

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 145.12	α = 90
b = 165.09	β = 104.09
c = 194.37	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	MARMOSAIC 225 mm CCD		2004-07-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-1	0.9793	ESRF	ID23-1

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	1.9	19	89.2	0.082	7.9	3	662364	660107			20.3

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	1.9	2.2	79		0.436	2.43	2.6

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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entries 1KB9 and 1YCC	1.9	18.99	662364	660107	33007	95	0.245	0.245	0.245	0.263	RANDOM	46

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]
10.48		0.45	-5.98		-4.51

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.8
c_scangle_it	2.82
c_mcangle_it	2.05
c_scbond_it	1.94
c_mcbond_it	1.27
c_angle_deg	1.2
c_improper_angle_d	1.16
c_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	35408
Nucleic Acid Atoms
Solvent Atoms	1648
Heterogen Atoms	955

Software

Software
Software Name	Purpose
CNS	refinement
DNA	data collection
XDS	data reduction
XDS	data scaling
AMoRE	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.