4A52

NMR structure of the imipenem-acylated L,D-transpeptidase from Bacillus subtilis

SOLUTION NMR

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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.	CNS1.2

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.

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	refinement	CNS1.2		BRUNGER,ADAMS,CLORE,DELANO,GROS,GROSSE- KUNSTLEVE,JIANG,KUSZEWSKI,NILGES,PANNU,READ, RICE,SIMONSON,WARREN
2	structure solution	CNS	1.2
3	structure solution	TALOS ANY	ANY
4	structure solution	UNIO	10
5	structure solution	NMRDRAW ANY	ANY
6	structure solution	NMRPIPE ANY	ANY
7	structure solution	CCPNMR ANALYSIS	2.2