Predicted to enable GTP binding activity. Predicted to be involved in cytoplasmic microtubule organization and microtubule nucleation. Predicted to be located in microtubule. Predicted to be part of gamma-tubulin complex. Is an ortholog of C. elegans tbg-1. In C. elegans, tbg-1 is involved in several processes, including maintenance of centrosome location; organelle organization; and regulation of cell cycle.