This region is always found associated with pfam02141. It is predicted to form a globular domain. Although not statistically supported it has been suggested that this domain may be similar to members of the Rho/Rac/Cdc42 GEF family. This N-terminal region of DENN folds into a longin module, consisting of a central antiparallel beta-sheet layered between helix H1 and helices H2 and H3 (strands S1-S5). Rab35 interacts with dDENN via residues in helix 1 and in the loop S3-S4.