1ILP | pdb_00001ilp

CXCR-1 N-TERMINAL PEPTIDE BOUND TO INTERLEUKIN-8

SOLUTION NMR

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NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	ASSIGNMENT: SEE REFERENCE 1; RESTRAINTS: 3D 15N-EDITED-NOESY HSQC			0.15 M	5.5	1 atm	308
2	3D 13C-FILTERED			0.15 M	5.5	1 atm	308
3	13C-EDITED-NOESY HMQC			0.15 M	5.5	1 atm	308
4	2D 15N-FILTERED NOESY			0.15 M	5.5	1 atm	308
5	2D 13C-FILTERED NOESY (100MS)			0.15 M	5.5	1 atm	308
6	15N-FILTERED NOESY (ALL MIXING TIMES = 100 MS)			0.15 M	5.5	1 atm	308

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AMX 500	500

NMR Refinement
Method	Details	Software
RESTRAINED MOLECULAR DYNAMICS	INITIAL COORDINATES FOR IL-8 WERE TAKEN FROM PDB ENTRY 1IL8; A LINEAR CHAIN FOR THE CXCR-1 FRAGMENT WAS BUILT IN INSIGHT (MSI). THE CXCR-1 FRAGMENT WAS POSITIONED RANDOMLY WITH RESPECT TO IL8 - OBTAIN 40 STARTING CONFORMATIONS. THE INITIAL STRUCTURES WERE THEN REFINED USING RMD WITH THE AMBER ALL ATOM FORCE FIELD AS IMPLIMENTED WITHIN DISCOVER. ALL OF IL8 MONOMER B AND PARTS OF IL8 MONOMER A (2-7, 22-38 AND 51-72) WERE KEPT FIXED DURING THE REFINEMENT SINCE CHEMICAL SHIFT CHANGES INDICATED THAT THESE PORTION OF THE MOLECULE WERE NOT PERTURBED BY PEPTIDE BINDING. SEE JRNL ENTRY FOR MORE DETAILS.	Discover

NMR Ensemble Information
Conformer Selection Criteria	LEAST RESTRAINT VIOLATION ENERGY
Conformers Calculated Total Number	40
Conformers Submitted Total Number	20

Additional NMR Experimental Information
Details	THE ASSIGNMENTS WERE MADE USING TRIPLE RESONANCE NMR EXPERIMENTS CONDUCTED ON 13C/15N LABELED IL-8 BOUND TO UNLABELED CXCR-1 PEPTIDE (SEE JRNL ENTRY FOR MORE DETAILS) NOE RESTRAINTS WERE OBTAINED FROM 15N EDITED EXPERIMENTS (INTRA IL8), 13C OR 15N FILTERED EXPERIMENTS (INTRA CXCR-1) OR 13C-FILTERED/ EDITED EXPERIMENTS (INTERMOLECULAR RESTRAINTS)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	Discover		BIOSYM
2	structure solution	MSI DISCOVER	DISCOVER