Answer :
Answer:
the beta-gamma subunit to form an inactive trimeric protein.
Explanation:
When inactive, the alpha subunit of the G-protein is bound to a GDP molecule.
- The guanine nucleotide-binding proteins (commonly called G proteins or GTPases) represent an evolutionarily conserved protein family that serves to switch on/off different signaling pathways within the cell.
- G-proteins are composed of three different subunits: Gα, Gβ, and Gγ subunits.
- When GDP is bound to Gα, this subunit remains bound to the Gβ subunit in order to form an inactive heterotrimeric protein.
- When GTP is bound to the G-protein, then Gα dissociates from the other subunits and triggers the activation of the G-protein.
In conclusion, when inactive, the alpha subunit of the G-protein is bound to a GDP molecule.
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