This region is found in the actin binding protein Shroom which mediates apical contriction in epithelial cells and is required for neural tube closure.

1: Shroom regulates epithelial cell shape via the apical positioning of an actomyosin network. Hildebrand JD; J Cell Sci. 2005;118:5191-5203. PMID:16249236

2: Shroom induces apical constriction and is required for hingepoint formation during neural tube closure. Haigo SL, Hildebrand JD, Harland RM, Wallingford JB; Curr Biol. 2003;13:2125-2137. PMID:14680628

3: Shroom, a PDZ domain-containing actin-binding protein, is required for neural tube morphogenesis in mice. Hildebrand JD, Soriano P; Cell. 1999;99:485-497. PMID:10589677