Abstract:
:The serotonin transporter (SERT), a member of the neurotransmitter:sodium symporter family, is responsible for termination of serotonergic signaling by re-uptake of serotonin (5-HT) into the presynaptic neuron. Its key role in synaptic transmission makes it a major drug target, e.g. for the treatment of depression, anxiety and post-traumatic stress. Here, we apply hydrogen-deuterium exchange mass spectrometry to probe the conformational dynamics of human SERT in the absence and presence of known substrates and targeted drugs. Our results reveal significant changes in dynamics in regions TM1, EL3, EL4, and TM12 upon binding co-transported ions (Na+/K+) and ligand-mediated changes in TM1, EL3 and EL4 upon binding 5-HT, the drugs S-citalopram, cocaine and ibogaine. Our results provide a comprehensive direct view of the conformational response of SERT upon binding both biologically relevant substrate/ions and ligands of pharmaceutical interest, thus advancing our understanding of the structure-function relationship in SERT.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Möller IR,Slivacka M,Nielsen AK,Rasmussen SGF,Gether U,Loland CJ,Rand KDdoi
10.1038/s41467-019-09675-zsubject
Has Abstractpub_date
2019-04-11 00:00:00pages
1687issue
1issn
2041-1723pii
10.1038/s41467-019-09675-zjournal_volume
10pub_type
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