Review:The Guanylate-Binding Proteins (GBPs): Proinflammatory Cytokine-Induced Members of the Dynamin Superfamily with Unique GTPase Activity

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Abstract
The guanylate-binding proteins (GBPs) were first identified in the late 1970s, and within a short period of time, investigators were aware that GBPs possessed unique properties, in particular the ability to bind GMP agarose. Since then, much study has gone into understanding their mechanism of induction by interferons (IFNs) and other cytokines, and they have been used extensively as markers for IFN responsiveness in both cells and organisms. In time, we learned that GBPs had the unusual ability to hydrolyze GTP to both GDP and GMP. More recently, we have begun to appreciate their novel structure, one that suggests unique mechanisms of GTP binding and hydrolysis and unique forms of regulation. In addition, we have begun to unravel some of their functions and to separate these function into those functions that do and those that do not require GTPase activity.

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