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NMR structure of the imipenem-acylated L,D-transpeptidase from Bacillus subtilis
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
13C-HSQC-NOESY
90% H2O/10% D2O
0.15
6.5
1.0 atm
298.0
2
1H-15N- HSQC
90% H2O/10% D2O
0.15
6.5
1.0 atm
298.0
3
1H -13C-HSQC
90% H2O/10% D2O
0.15
6.5
1.0 atm
298.0
4
13C- HSQC-NOESY METHYL SELECTIVE
90% H2O/10% D2O
0.15
6.5
1.0 atm
298.0
5
15N-HSQC-NOESY
90% H2O/10% D2O
6
1H-15N- HMQC OPTIMIZED FOR IMIDAZOLE RING OF HISTIDINES
90% H2O/10% D2O
7
HNCO
90% H2O/10% D2O
8
HNCACB
90% H2O/10% D2O
9
1H- 13C-HSQC CENTERED ON AROMATICS
90% H2O/10% D2O
10
13C-HSQC-NOESY CENTERED ON AROMATICS
90% H2O/10% D2O
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Bruker
AVANCE
900
2
Bruker
AVANCE
800
3
Varian
INOVA
600
NMR Refinement
Method
Details
Software
ITERATIVE STRUCTURE CALCULATION WITH ARIA2.3
REFINEMENT IN WATER AFTER 8 ITERATIONS.
CNS
NMR Ensemble Information
Conformer Selection Criteria
STRUCTURE WITH THE LOWEST ENERGY
Conformers Calculated Total Number
20
Conformers Submitted Total Number
20
Representative Model
1 (n/a)
Additional NMR Experimental Information
Details
THE 20 NMR STRUCTURES WERE DETERMINED USING TRIPLE- RESONANCE NMR SPECTROSCOPY ON A 13C, 15N-LABELED LDTBS SAMPLE INCUBATED WITH 2.5 EQUIVALENTS OF IMIPENEM ANTIBIOTIC. THESE STRUCTURES WERE REFINED WITH RDCS, AND REFINED IN WATER WITHIN CNS ARIA.