This is a small family of fungal proteins that are involved in cytokinesis, the last stage of the cell-division cycle. Nod1 co-localises with Gef2 - RhoGEF - in the contractile ring and its precursor cortical nodes. Nod1 and Gef2 interact through this C-terminal region of each, this interaction being important for their localisation [1].

1: Cooperation between Rho-GEF Gef2 and its binding partner Nod1 in the regulation of fission yeast cytokinesis. Zhu YH, Ye Y, Wu Z, Wu JQ; Mol Biol Cell. 2013;24:3187-3204. PMID:23966468