TMEM132D_C is the C-terminal family of chordate proteins implicated in panic disorder. TMEM132D is a single-pass transmembrane protein that is highly expressed in the cortical regions of the human and mouse brain. The function is still unknown. It may act as a cell-surface marker for oligodendrocyte differentiation [1,2]. Additionally, as it may be most strongly expressed in neurons and it colocalises with actin filaments TMEM132D may be implicated in neuronal sprouting and connectivity in brain regions important for anxiety-related behaviour [3].

1: Molecular cloning of a novel transmembrane protein MOLT expressed by mature oligodendrocytes. Nomoto H, Yonezawa T, Itoh K, Ono K, Yamamoto K, Oohashi T, Shiraga F, Ohtsuki H, Ninomiya Y; J Biochem. 2003;134:231-238. PMID:12966072

2: GRP78-binding protein regulates cAMP-induced glial fibrillary acidic protein expression in rat C6 glioblastoma cells. Oh-hashi K, Hirata Y, Koga H, Kiuchi K; FEBS Lett. 2006;580:3943-3947. PMID:16806201

3: Replication and meta-analysis of TMEM132D gene variants in panic disorder. Erhardt A, Akula N, Schumacher J, Czamara D, Karbalai N, Muller-Myhsok B, Mors O, Borglum A, Kristensen AS, Woldbye DP, Koefoed P, Eriksson E, Maron E, Metspalu A, Nurnberger J, Philibert RA, Kennedy J, Domschke K, Reif A, Deckert J, Otowa T, Kawamura Y, Kaiya H, Okazaki Y, Tanii H, Tokunaga K, Sasaki T, Ioannidis JP, McMahon FJ, Binder EB; Transl Psychiatry. 2012;2:e156. PMID:22948381