G Protein-Coupled Receptor (GPCR) Paper Model
![G protein-coupled receptor from PDB structure 6dde](https://cdn.rcsb.org/pdb101/learn/resources/gpcr/gpcr-6dde.png)
On the extracellular side, the helices form a cavity where ligands (e.g. endorphins, morphine, serotonin) bind. On the intracellular side, the receptor is coupled to G protein. When the receptor is activated by a ligand, the G protein splits in two parts which then activate other proteins in the internal signal transduction pathways.
Examples of GPCRs are opioid receptors, rhodopsin or adrenergic receptors.
![photo of paper model of GPCR](https://cdn.rcsb.org/pdb101/learn/resources/gpcr/gpcr-model.png)
To build the paper model featuring the shared structural features of all GPCRs download and print the template PDF.
![screenshot of 3D session of PDB Structure 1F88](https://cdn.rcsb.org/pdb101/learn/resources/gpcr/gpcr-2rh1.png)
This paper model is not based on any particular PDB structure. Explore examples of GPCRs in 3D: 6dde (opioid receptor), 2rh1 (adrenergic receptor), and 1f88 (rhodopsin).
Video Instructions: How to fold the GPCR paper model
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