- #1
nemzy
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does anyone know why g-proteins has a shape of a helix??
The shape of g-proteins is due to the presence of alpha helices, which are secondary structures found in proteins. These helices are formed by hydrogen bonding between the amino acid residues, giving the protein a stable and compact shape.
The helical shape of g-proteins allows them to interact with other molecules and proteins in a specific and precise manner. This is crucial for their function as signaling molecules, as they need to bind to specific receptors and activate downstream signaling pathways.
Yes, the helical shape of g-proteins is essential for their function. The shape allows the protein to have specific binding sites for other molecules, and also enables the protein to undergo conformational changes, which are necessary for signal transduction.
No, not all g-proteins have a helical shape. While most g-proteins have a helical structure, there are some exceptions, such as transducin, which has a beta-sheet structure. However, the majority of g-proteins have a helical shape due to the prevalence of alpha helices in protein structures.
Yes, the helical shape of g-proteins can change in response to different stimuli. This is known as conformational changes and is necessary for the protein to carry out its function. For example, when a g-protein binds to a receptor, it undergoes a conformational change that allows it to activate downstream signaling pathways.