1CFF

NMR SOLUTION STRUCTURE OF A COMPLEX OF CALMODULIN WITH A BINDING PEPTIDE OF THE CA2+-PUMP

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	HNCO	90% H2O/10% D2O, 100% D2O		0.115	6.5	1 atm	303
2	HNCA	90% H2O/10% D2O, 100% D2O		0.115	6.5	1 atm	303
3	CBCACONH	90% H2O/10% D2O, 100% D2O		0.115	6.5	1 atm	303
4	CBCANH	90% H2O/10% D2O, 100% D2O		0.115	6.5	1 atm	303
5	HCCCONH	90% H2O/10% D2O, 100% D2O		0.115	6.5	1 atm	303
6	HCCH-TOCSY	90% H2O/10% D2O, 100% D2O		0.115	6.5	1 atm	303
7	NOESY-HSQC	90% H2O/10% D2O, 100% D2O		0.115	6.5	1 atm	303

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	DRX600	600
2	Bruker	DRX800	800

NMR Refinement
Method	Details	Software
simulated annealing	REFINEMENT DETAILS CAN BE FOUND IN THE JRNL CITATION ABOVE. IT IS IMPOSSIBLE TO SUPERIMPOSE THE N- AND C-TERMINAL DOMAIN OF CAM SIMULTANEOUSLY DUE TO THE LACK OF NOES BETWEEN BOTH DOMAINS. THEREFOR THE 26 STRUCTURES ARE SUPERIMPOSED ONLY OVER THE BACKBONE ATOMS OF THE C-TERMINAL DOMAIN OF CAM AND THE PEPTIDE C20W. RMSD VALUES OF THE N-TERMINAL DOMAIN OF CAM (LEU A 4 - ALA A 73) ARE 0.85 (BACKBONE) AND 1.27 (HEAVY ATOMS) ANGSTROMS. RMSD VALUE FOR THE C- TERMINAL DOMAIN OF CAM AND THE PEPTIDE C20W (ILE A 85 - MET A 145, GLY B 4 - GLN B 16) ARE 0.57 (BACKBONE) AND 1.08 (HEAVY ATOMS) ANGSTROMS. RESIDUES ALA A 1 - GLN A 3, ARG A 74 - GLU A 84, THR A 146 - LYS A 148 OF CAM AND RESIDUES LEU B 1 - ARG B 3, THR B 17 - LYS B 20 OF THE PEPTIDE C20W ARE DISORDERED.	X-PLOR

NMR Ensemble Information
Conformer Selection Criteria	LOWEST ENERGY
Conformers Calculated Total Number	200
Conformers Submitted Total Number	26

Additional NMR Experimental Information
Details	THE UNLABELED PEPTIDE C20W WAS ASSIGNED USING A 12C,14N-FILTERED NOESY- EXPERIMENT. INTERMOLECULAR NOES BETWEEN 13C,15N-LABELED CALMODULIN AND THE PEPTIDE WERE MEASURED USING A 12C,14N-F2-FILTERED NOESY-HSQC EXPERIMENT

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	X-PLOR	3.851	BRUNGER
2	structure solution	XPLOR

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.