This family is an Ig-like domain found on plant-specific actin-binding proteins or SCABs. SCAB proteins bind, bundle and stabilise actin filaments and regulate stomatal movement. The Ig-PH fusion domain is at the C-terminus. This domain is an Ig beta-sandwich fold consisting of two antiparallel beta-sheets built from strands beta1 and beta2 and strands beta3-beta6, respectively.

1: Plant actin-binding protein SCAB1 is dimeric actin cross-linker with atypical pleckstrin homology domain. Zhang W, Zhao Y, Guo Y, Ye K; J Biol Chem. 2012;287:11981-11990. PMID:22356912