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Updated: Jul 31, 2026

Measuring G-protein-coupled Receptor Signaling via Radio-labeled GTP Binding
Published on: June 9, 2017
GPCRs globally coevolved with receptor activity-modifying proteins, RAMPs
Shahar Barbash1, Emily Lorenzen1, Torbjörn Persson1,2
1Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, NY, 10065.
Receptor activity-modifying proteins (RAMPs) and G-protein-coupled receptors (GPCRs) show global coevolution, suggesting widespread interactions in cellular signaling. This indicates functional redundancy and coordinated roles between RAMPs and GPCRs.
Area of Science:
- Molecular biology
- Genomics
- Cellular signaling
Background:
- Receptor activity-modifying proteins (RAMPs) influence G-protein-coupled receptors (GPCRs) in some cases.
- The extent and functional impact of RAMP-GPCR interactions remain largely unexplored.
- The vast number of GPCRs and limited RAMPs pose challenges for experimental investigation.
Purpose of the Study:
- To investigate the global prevalence and evolutionary patterns of RAMP-GPCR interactions.
- To determine the functional consequences of RAMP-GPCR associations in cellular signaling.
Main Methods:
- Comparative genomic analysis across sequenced organisms.
- Phylogenetic tree correlation analysis of RAMP and GPCR orthologs.
- Human transcriptome analysis to assess expression correlation.
Main Results:
- RAMPs and GPCRs exhibit correlated phylogenetic trees, suggesting coevolution.
- A RAMP-GPCR interaction map indicates potential functional redundancy between RAMP1 and RAMP3.
- Significant expression correlation was observed between GPCRs and RAMPs in human transcriptomes.
Conclusions:
- Evidence supports global coevolution of GPCRs and RAMPs.
- The findings support a widespread interaction model between GPCRs and RAMPs in cellular signaling pathways.
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