2A55

Solution structure of the two N-terminal CCP modules of C4b-binding protein (C4BP) alpha-chain.

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	3D_13C-separated_NOESY	2.5 mM C4BP12 U-13C, 15N, 20 mM sodium acetate buffer, pH 4.5, 90% H2O, 10% D2O	90% H2O/10% D2O	20 mM sodium acetate buffer	4.5	1 atm	310
2	3D_15N-separated_NOESY	2.5 mM C4BP12 U-13C, 15N, 20 mM sodium acetate buffer, pH 4.5, 90% H2O, 10% D2O	90% H2O/10% D2O	20 mM sodium acetate buffer	4.5	1 atm	310
3	NH-IPAP 15N HSQC	0.70 mM C4BP12 U-13C, 15N, 7.3 mg/ml Pf1 phage, 20 mM sodium acetate buffer, pH 5.5, 90 mM NaCl, 90% H2O, 10% D2O	90% H2O/10% D2O	20 mM sodium acetate buffer, 90 mM NaCl	5.5	1 atm	310
4	NC-HN(a/b-NC'-J)	0.70 mM C4BP12 U-13C, 15N, 7.3 mg/ml Pf1 phage, 20 mM sodium acetate buffer, pH 5.5, 90 mM NaCl, 90% H2O, 10% D2O	90% H2O/10% D2O	20 mM sodium acetate buffer, 90 mM NaCl	5.5	1 atm	310
5	CC-HN(a/b-COCA-J)	0.70 mM C4BP12 U-13C, 15N, 7.3 mg/ml Pf1 phage, 20 mM sodium acetate buffer, pH 5.5, 90 mM NaCl, 90% H2O, 10% D2O	90% H2O/10% D2O	20 mM sodium acetate buffer, 90 mM NaCl	5.5	1 atm	310
6	CaHa-2D J-(HNCO)CANH	0.70 mM C4BP12 U-13C, 15N, 7.3 mg/ml Pf1 phage, 20 mM sodium acetate buffer, pH 5.5, 90 mM NaCl, 90% H2O, 10% D2O	90% H2O/10% D2O	20 mM sodium acetate buffer, 90 mM NaCl	5.5	1 atm	310

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

NMR Refinement
Method	Details	Software
molecular dynamics simulated annealing	the structures are based on 3032 NOE-derived distance restraints and 219 RDC restraints	CNS

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	40
Representative Model	1 (closest to the average)

Additional NMR Experimental Information
Details	All RDC experiments (i.e. NH-IPAP 15N HSQC,, NC-HN(a/b-NC'-J), CC-HN(a/b-COCA-J), CaHa-2D J-(HNCO)CANH were recorded twice, once in aligned media (Solution Id 2) and once in unaligned media (solution Id 1)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	structure solution	CNS	1.1	Brunger
2	processing	Azara	2.7	Boucher
3	data analysis	ANSIG	3.3	Kraulis
4	refinement	CNS	1.1	Brunger

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.