Find PDB structures and Computed Structure Models (CSM) by combining queries from tools in this suite: Attribute Search, Sequence Similarity, Sequence Motif, 3D Similarity, and 3D Motif with 'AND' logic.
NMR structure of transmembrane segment IV of the NHE1 isoform of the Na+/H+ exchanger
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
2D NOESY
2 mM TM IV, unlabelled; 1 mM DSS
CDCl3:CD3OH:H2O (4:4:1 v:v:v)
ambient
303
2
2D TOCSY
2 mM TM IV, unlabelled; 1 mM DSS
CDCl3:CD3OH:H2O (4:4:1 v:v:v)
ambient
303
3
DQF-COSY
2 mM TM IV, unlabelled; 1 mM DSS
CDCl3:CD3OH:H2O (4:4:1 v:v:v)
ambient
303
4
HNHA
2 mM TM IV, U-15N; 1 mM DSS
CDCl3:CD3OH:H2O (4:4:1 v:v:v)
ambient
303
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Varian
INOVA
800
2
Varian
UNITY
600
3
Varian
INOVA
500
NMR Refinement
Method
Details
Software
simulated annealing
15 rounds of simulated annealing were carried out to optimize included NOE contacts and lengths, as well as J-HNHA. Finally, homoserine lactone was included. The ensemble of structures given is superposed over the region I169-F176. Other useful superpositions that should be examined are D159-L163 and L165-P168.
VNMR
NMR Ensemble Information
Conformer Selection Criteria
structures with the lowest energy
Conformers Calculated Total Number
1000
Conformers Submitted Total Number
100
Additional NMR Experimental Information
Details
This structure was determined using standard 2D homonuclear techniques with the exception that HNHA J-coupling constants were incorporated.
Computation: NMR Software
#
Classification
Version
Software Name
Author
1
collection
VNMR
various
Varian Inc.
2
processing
NMRPipe
2.3
Frank Delaglio, Stephan Grzesiek, Guang Zhu, Geerten W. Vuister, John Pfeifer, and Ad Bax