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GHITM
Growth hormone-inducible transmembrane protein (GHITM), also known as transmembrane BAX inhibitor motif containing protein 5 (TMBIM5), is a protein that in humans is encoded by the ''GHITM'' gene on chromosome 10.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=27069 )〕 It is a member of the BAX inhibitor motif containing (TMBIM) family and localizes to the inner mitochondrial membrane (IMM), as well as the endoplasmic reticulum (ER), where it plays a role in apoptosis through mediating mitochondrial morphology and cytochrome c release. Through its apoptotic function, GHITM may be involved in tumor metastasis and innate antiviral responses.
==Structure==
This gene encodes a 37 kDa protein which putatively contains six to eight transmembrane domains. As a member of the TMBIM family, GHITM shares a transmembrane BAX inhibitor motif, a semi-hydrophobic transmembrane domain, and similar tertiary structure with the other five members. However, unlike the other members, GHITM possesses a unique acidic (D) instead of a basic (H or R) residue near its second transmembrane domain, as well as an additional transmembrane domain that, after cleavage behind residue 57 (SREY|A), signals for localization to the IMM.〔〔〔 Nonetheless, it is possible that cleavage at different sites (XXRR-like motif (LAAR) in the N-terminal and a KKXX-like motif (GNRK) in the C-terminal) or alternative splicing may account for the protein’s observed localization to the ER.〔〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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