Transmembrane protein 131-like (TMEM131L) was identified as a negative regulator of thymocyte proliferation that acts through mixed Wnt-dependent and independent mechanisms. It has two isoforms, L and S, which have different subcellular localisation. L isoform, the membrane-associated form, inhibits canonical Wnt/beta-catenin signalling through the induction of lysosome-dependent degradation of the active phosphorylated form of the LRP6 coreceptor. This protein contains three conserved homology domains (CHD1, 2 and 3), a transmembrane region and a C-terminal serine-rich region [1]. This family is related to Pfam:PF12371.

1: Identification of TMEM131L as a novel regulator of thymocyte proliferation in humans. Maharzi N, Parietti V, Nelson E, Denti S, Robledo-Sarmiento M, Setterblad N, Parcelier A, Pla M, Sigaux F, Gluckman JC, Canque B; J Immunol. 2013;190:6187-6197. PMID:23690469