Yes, Ras is a GTPase.
Ras proteins are a family of small GTPases involved in cellular signal transduction. Here's a breakdown:
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Ras belongs to a class of enzymes called GTPases, which bind to and hydrolyze guanosine triphosphate (GTP).
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According to the provided information, Ras is a single-subunit small GTPase. This means it's a smaller protein that functions as a GTPase.
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The reference also notes its structural similarity to the Gα subunit of heterotrimeric G proteins, which are large GTPases.
In summary, Ras is indeed a GTPase, specifically a small, single-subunit GTPase.
