Primary Citation PubMed: 23667707
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Signal transduction pathways in the pentameric ligand-gated ion channels.
(2013) PLoS One 8
PubMed: 23667707 | PubMedCentral: PMC3648548 | DOI: 10.1371/journal.pone.0064326
( b ) The C loop region of the crystal structure of the NQN mutant (orange; PDB code: 4IRE), showing an outward movement of the C loop in comparison with the wild type GLIC (yellow and gray; PDB code ... F8H) due to removal of salt bridges in the mutant.
In order to understand the functional role of these salt bridges, we performed the NQN mutation (D91N, E177Q, D178N) to eliminate the salt bridges, crystallized the NQN mutant, and solved its structure (PDB: 4IRE) to a resolution of 3.19 Å ( Table 1 ).
Reflections (test set) 61291 (999) R work /R free 0.204/0.243 Non-H protein (ligand) atoms 12686 (754) <B-factors> (Å 2 ) Protein 87.3 Detergents 107.5 Lipids 121.0 Solvent 93.5 R.M.S. Deviations Bond lengths (Å) 0.009 Bond angles (degrees) 1.3 Rotamer outliers (%) 5.3 Ramachandran outliers (%) 0.19 Ramachandran favored (%) 97.17 PDB code 4IRE a Values in the parentheses are for highest-resolution shell.
Publication Year: 2013
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