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The solution structure of the nisin-lipid II complex
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
1H-15N CT HSQC
100% D6-DMSO
1.0 atm
300.0
2
31P 1D
100% D6-DMSO
1.0 atm
300.0
3
1H-13C HSQC
100% D6-DMSO
1.0 atm
300.0
4
1H-13C HMBC
100% D6-DMSO
1.0 atm
300.0
5
31P 1D
100% D6-DMSO
1.0 atm
300.0
6
1H-15N-NOESY HSQC
100% D6-DMSO
1.0 atm
300.0
7
1H-1H NOESY
100% D6-DMSO
1.0 atm
300.0
8
1H-15N TOCSY- HSQC
100% D6-DMSO
1.0 atm
300.0
9
1H-1H TOCSY
100% D6-DMSO
1.0 atm
300.0
10
1H-1H COSY
100% D6-DMSO
1.0 atm
300.0
11
1H-15N-NOESY HSQC
100% D6-DMSO
1.0 atm
300.0
12
1H-1H NOESY
100% D6-DMSO
1.0 atm
300.0
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
AVANCE
500
2
Bruker
AVANCE
600
3
Bruker
AVANCE
750
4
Bruker
AVANCE
900
NMR Refinement
Method
Details
Software
HADDOCK
REFINEMENT DETAILS CAN BE FOUND IN THE JRNL CITATION ABOVE. THE ENSEMBLE OF STRUCTURES IS SUPERIMPOSED ON THE CA OF NISIN RESIDUES 1-12 (CHAIN N), THE HEAVY ATOMS OF MURNAC, PYROPHOSPHATE AND THE FIRST ISOPRENE OF 3-LIPID II (CHAIN L) AS THESE ARE THE ONLY SEGMENTS THAT HAVE SUFFICIENT DISTANCE RESTRAINTS TO DEFINE THE COMPLEX STRUCTURE. OTHER RESIDUES NAMELY RESIDUES 13-34 (ESPECIALLY RESIDUES 20-34) OF NISIN, THE PENTAPEPTIDE AND TERMINAL ISOPRENE UNITS OF 3-LIPID II ARE FLEXIBLE AS SUPPORTED BY DYNAMICS DATA. THE ATOM OCCUPANCY OF THE C- TERMINAL TAIL OF NISIN (RESIDUES 20-34) HAS BEEN MODIFIED TO BE 0.3 TO REFLECT THEIR DISORDER/FLEXIBILITY.
CNS
NMR Ensemble Information
Conformer Selection Criteria
RMSD CLUSTERING AND LOWEST TOTAL ENERGY
Conformers Calculated Total Number
200
Conformers Submitted Total Number
20
Additional NMR Experimental Information
Details
THE STRUCTURE WAS DETERMINED USING MULTIDIMENSIONAL NMR SPECTROSCOPY ON 15N-LABELLED NISIN IN COMPLEX WITH UNLABELLED 3-LIPID II. INTERMOLECULAR HYDROGEN BONDS WERE IDENTIFIED AND USED IN STRUCTURAL CALCULATION BY 31P- EDITED 1H-15N CT HSQC.