2LDO

Solution structure of triheme cytochrome PpcA from Geobacter sulfurreducens reveals the structural origin of the redox-Bohr effect

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-15N HSQC	1 mM [U-100% 15N] CYTOCHROME C3-1, 1 mM PROTOPORPHYRIN IX CONTAINING FE-2, 45 mM sodium phosphate-3, 0.04 % sodium azide-4	93% H2O/7% D2O	100	7.1	AMBIENT	298
2	3D 1H-15N NOESY	1 mM [U-100% 15N] CYTOCHROME C3-1, 1 mM PROTOPORPHYRIN IX CONTAINING FE-2, 45 mM sodium phosphate-3, 0.04 % sodium azide-4	93% H2O/7% D2O	100	7.1	AMBIENT	298
3	3D 1H-15N TOCSY	1 mM [U-100% 15N] CYTOCHROME C3-1, 1 mM PROTOPORPHYRIN IX CONTAINING FE-2, 45 mM sodium phosphate-3, 0.04 % sodium azide-4	93% H2O/7% D2O	100	7.1	AMBIENT	298
4	2D 1H-1H TOCSY	1 mM CYTOCHROME C3-5, 1 mM PROTOPORPHYRIN IX CONTAINING FE-6, 45 mM sodium phosphate-7, 0.04 % sodium azide-8	93% H2O/7% D2O	100	7.1	AMBIENT	298
5	2D 1H-1H NOESY	1 mM CYTOCHROME C3-5, 1 mM PROTOPORPHYRIN IX CONTAINING FE-6, 45 mM sodium phosphate-7, 0.04 % sodium azide-8	93% H2O/7% D2O	100	7.1	AMBIENT	298
6	2D 1H-1H COSY	1 mM CYTOCHROME C3-5, 1 mM PROTOPORPHYRIN IX CONTAINING FE-6, 45 mM sodium phosphate-7, 0.04 % sodium azide-8	93% H2O/7% D2O	100	7.1	AMBIENT	298

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	800

NMR Refinement
Method	Details	Software
simulated annealing		TopSpin

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	200
Conformers Submitted Total Number	20
Representative Model	1 (lowest energy)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	collection	TopSpin		Bruker Biospin
2	processing	TopSpin		Bruker Biospin
3	chemical shift assignment	Sparky		Goddard
4	structure solution calculation	PARADYANA		D.L.TURNER,L,BRENNAN,S.G.CHAMBERLIN, R.O.LOURO, A.V.XAVIER
5	refinement	PARADYANA		D.L.TURNER,L,BRENNAN,S.G.CHAMBERLIN, R.O.LOURO, A.V.XAVIER
6	superimposition	MOLMOL		Koradi, Billeter and Wuthrich
7	visual inspection	MOLMOL		Koradi, Billeter and Wuthrich
8	rms and mean structure calculations	MOLMOL		Koradi, Billeter and Wuthrich
9	identification and classification of the consensus secondary structure	PROCHECKNMR		Laskowski and MacArthur

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.