Anti-Xin Actin-binding Repeat-containing Protein 1 (XIRP1) (Ser295) Antibody

XIRP1 is a member of the Xin family of proteins, containing 16 Xin repeats. The intercalated disk protein Xin protects actin filaments from depolymerization, and is able to bundle actin filaments to interact with β-catenin, which is thought to stabilize actin-based cytoskeletons (Choi et al., 2007). The evolutionary emergence of the Xin paralogs may have played a key role in the development of heart chambers with complete endothelial and myocardial layers (Grosskurth et al., 2008). Loss of mXina (mouse Xin homolog) results in cardiac hypertrophy and cardiomyopathy (Gustafson-Wagner et al., 2007). Phosphorylation of Ser-295 plays a key role in XIRP1 signaling, and therefore in cardiac hypertrophy, as it has been shown that acute pressure-overloaded hearts rapidly increased phosphorylation at the Ser-295 residue of XIRP1. (Chang et al., 2013).