The spiral shape of a coiled protein is called an alpha helix.

Here's a bit more about it:

* Structure: The alpha helix is a common secondary structure in proteins, formed by a tightly coiled polypeptide chain. The chain is held together by hydrogen bonds between the backbone atoms.

* Appearance: It looks like a spring or a spiral staircase.

* Importance: The alpha helix is important for the structure and function of many proteins, including enzymes, hormones, and antibodies.