<p>Several proteins have recently been shown to contain the 5 structural motifs characteristicof GTP-binding proteins [<cite idref="PUB00000217"/>]. These include murine DRG protein; GTP1 proteinfrom <taxon tax_id="4896">Schizosaccharomyces pombe</taxon>; OBG protein from <taxon tax_id="1423">Bacillus subtilis</taxon>; and several others.Although the proteins contain GTP-binding motifs and are similar to each other, they donot share sequence similarity to other GTP-binding proteins, and have thus been classedas a novel group, the GTP1/OBG family. As yet, the functions of these proteins are uncertain,but they have been shown to be important in development and normal cell metabolism[<cite idref="PUB00001824"/>, <cite idref="PUB00002073"/>].</p>