Structural prerequisites for G-protein activation by the neurotensin receptor
Abstract
We previously determined the structure of neurotensin receptor NTSR1 in an active-like conformation with six thermostabilizing mutations bound to the peptide agonist neurotensin. This receptor was unable to activate G proteins, indicating that the mutations restricted NTSR1 to relate agonist binding to G-protein activation. Here we analyse the effect of three of those mutations (E166A3.49, L310A6.37, F358A7.42) and present two structures of NTSR1 able to catalyse nucleotide exchange at Gα. The presence of F3587.42 causes the conserved W3216.48 to adopt a side chain orientation parallel to the lipid bilayer sealing the collapsed Na+ ion pocket and linking the agonist with residues in the lower receptor part implicated in GPCR activation. In the intracellular receptor half, the bulkier L3106.37 side chain dictates the position of R1673.50 of the highly conserved D/ERY motif. These residues, together with the presence of E1663.49 provide determinants for G-protein activation by NTSR1.
- Authors:
-
- National Inst. of Health (NIH), Rockville, MD (United States). Dept. of Health and Human Services
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- National Institutes of Health (NIH); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1203746
- Grant/Contract Number:
- AC02-06CH11357; AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 6; Journal Issue: 07, 2015; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES
Citation Formats
Krumm, Brian E., White, Jim F., Shah, Priyanka, and Grisshammer, Reinhard. Structural prerequisites for G-protein activation by the neurotensin receptor. United States: N. p., 2015.
Web. doi:10.1038/ncomms8895.
Krumm, Brian E., White, Jim F., Shah, Priyanka, & Grisshammer, Reinhard. Structural prerequisites for G-protein activation by the neurotensin receptor. United States. https://doi.org/10.1038/ncomms8895
Krumm, Brian E., White, Jim F., Shah, Priyanka, and Grisshammer, Reinhard. Fri .
"Structural prerequisites for G-protein activation by the neurotensin receptor". United States. https://doi.org/10.1038/ncomms8895. https://www.osti.gov/servlets/purl/1203746.
@article{osti_1203746,
title = {Structural prerequisites for G-protein activation by the neurotensin receptor},
author = {Krumm, Brian E. and White, Jim F. and Shah, Priyanka and Grisshammer, Reinhard},
abstractNote = {We previously determined the structure of neurotensin receptor NTSR1 in an active-like conformation with six thermostabilizing mutations bound to the peptide agonist neurotensin. This receptor was unable to activate G proteins, indicating that the mutations restricted NTSR1 to relate agonist binding to G-protein activation. Here we analyse the effect of three of those mutations (E166A3.49, L310A6.37, F358A7.42) and present two structures of NTSR1 able to catalyse nucleotide exchange at Gα. The presence of F3587.42 causes the conserved W3216.48 to adopt a side chain orientation parallel to the lipid bilayer sealing the collapsed Na+ ion pocket and linking the agonist with residues in the lower receptor part implicated in GPCR activation. In the intracellular receptor half, the bulkier L3106.37 side chain dictates the position of R1673.50 of the highly conserved D/ERY motif. These residues, together with the presence of E1663.49 provide determinants for G-protein activation by NTSR1.},
doi = {10.1038/ncomms8895},
journal = {Nature Communications},
number = 07, 2015,
volume = 6,
place = {United States},
year = {Fri Jul 24 00:00:00 EDT 2015},
month = {Fri Jul 24 00:00:00 EDT 2015}
}
Web of Science
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