Method: simulated annealing / Software ordinal: 1 Details: 1. The TM-JM dimer structure was calculated with 38 interchain NOEs (19 interchain NOE restraint per monomer). There are too few interchain NOEs to determine the configuration of the TM-JM ...Details: 1. The TM-JM dimer structure was calculated with 38 interchain NOEs (19 interchain NOE restraint per monomer). There are too few interchain NOEs to determine the configuration of the TM-JM dimer unambiguously. Therefore, we used observations from molecular dynamics simulations of the TM-JM segment in DMPC lipid bilayers (see Arkhipov et al. 2013, Cell in press; companion paper to the paper describing the analysis of the TM-JM structure in an experimental context), and selected a initial structure of the TM-JM dimer with a dimeric conformation of right handed crossing angles that was stable during the MD simulations. It was then refined using NMR restraints. 2. The secondary structure analysis suggested that the juxtamembrane -A segment has a 30% probability of helix formation. In order to model the juxtamembrane dimer we assumed that the juxtamembrane-A segment only forms a dimer when both juxtamembrane segments are helical.
NMR constraints
NOE constraints total: 580 / NOE long range total count: 38 / Hydrogen bond constraints total count: 36 / Protein chi angle constraints total count: 22 / Protein phi angle constraints total count: 92 / Protein psi angle constraints total count: 92
NMR representative
Selection criteria: lowest energy
NMR ensemble
Conformer selection criteria: structures with the lowest energy Conformers calculated total number: 50 / Conformers submitted total number: 10
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