1DXZ
M2 TRANSMEMBRANE SEGMENT OF ALPHA-SUBUNIT OF NICOTINIC ACETYLCHOLINE RECEPTOR FROM TORPEDO CALIFORNICA, NMR, 20 STRUCTURES
SOLUTION NMR
NMR Experiment | ||||||||
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Experiment | Type | Sample Contents | Solvent | Ionic Strength | pH | Pressure | Temperature (K) | Spectrometer |
1 | DQF-COSY | CDCL3/CD3OH=1/1 WITH 0.1 M LICLO4 | 0.1 M LICLO4 | 4.0 | 1 atm | 303 | ||
2 | TOCSY | CDCL3/CD3OH=1/1 WITH 0.1 M LICLO4 | 0.1 M LICLO4 | 4.0 | 1 atm | 303 | ||
3 | NOESY | CDCL3/CD3OH=1/1 WITH 0.1 M LICLO4 | 0.1 M LICLO4 | 4.0 | 1 atm | 303 |
NMR Spectrometer Information | |||
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Spectrometer | Manufacturer | Model | Field Strength |
1 | Varian | UNITY | 600 |
NMR Refinement | ||
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Method | Details | Software |
distance geometry | REFINEMENT DETAILS CAN BE FOUND IN THE JRNL CITATION ABOVE. THE NMR STUDY HAS BEEN CONDUCTED USING THE SYNTHETIC PEPTIDE WITH METHIONINE 243 REPLACED BY NORLEUCINE. SUCH AN ISOSTERIC REPLACEMENT USUALLY DOES NOT AFFECT THE PEPTIDE CONFORMATION, WHILE SYMPLIFYING THE SYNTHESIS. TO AVOID DIFFICULTIES WHICH MAY ARISE FROM THE PRESENCE OF A NONSTANDARD AMINO ACID RESIDUE AS WELL AS FOR THE PURPOSE OF AGREEMENT BETWEEN THE NATIVE M2 FRAGMENT AND THE CONFORMERS TO BE DEPOSITED, THE NORLEUCINE RESIDUE WAS REPLACED BY METHIONINE. | FANTOM |
NMR Ensemble Information | |
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Conformer Selection Criteria | LEAST RESTRAINTS VIOLATION |
Conformers Calculated Total Number | 300 |
Conformers Submitted Total Number | 20 |
Representative Model | 4 (n/a) |
Additional NMR Experimental Information | |
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Details | THE STRUCTURE WAS DETERMINED USING 2D-1H-NMR SPECTROSCOPY IN THE MEDIUM WHICH SHOULD BE ADEQUATE FOR THE M2 SEGMENT WITH ITS NON-LIPID SURROUNDING IN THE INTACT NICOTINIC ACTYLCHOLINE RECEPTOR. THE PH GIVEN IN THE EXPERIMENTAL DETAILS IS AN APPROXIMATION ONLY FOR THE MIXTURE OF ORGANIC SOLVENTS USED. |
Computation: NMR Software | ||||
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# | Classification | Version | Software Name | Author |
1 | refinement | FANTOM | 4.0 | R.FRACZKIEWICZ,C.MUMENTHALER,B. VON FREYBERG, T.SCHAUMANN,W.BRAUN |
2 | structure solution | VARIAN VNMR | VNMR | |
3 | structure solution | XEASY | ||
4 | structure solution | DYANA | ||
5 | structure solution | MARDIGRAS |