This motif family includes the three vinculin binding sites found in the Shigella SipA/IpaA protein [1]. The family also includes some proteins from Chlamydia species.

1: Novel vinculin binding site of the IpaA invasin of Shigella. Park H, Valencia-Gallardo C, Sharff A, Tran Van Nhieu G, Izard T; J Biol Chem. 2011;286:23214-23221. PMID:21525010