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TSG101
Tumor susceptibility gene 101, also known as TSG101, is a human gene that encodes for a cellular protein of the same name.
== Function ==
The protein encoded by this gene belongs to a group of apparently inactive homologs of ubiquitin-conjugating enzymes. The gene product contains a coiled-coil domain that interacts with stathmin, a cytosolic phosphoprotein implicated in tumorigenesis. The protein may play a role in cell growth and differentiation and act as a negative growth regulator. In vitro steady-state expression of this tumor susceptibility gene appears to be important for maintenance of genomic stability and cell cycle regulation. Mutations and alternative splicing in this gene occur in high frequency in breast cancer and suggest that defects occur during breast cancer tumorigenesis and/or progression.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=7251 )〕
The main role of ESCRT-I is to recognise ubiquitinated cargo via the UEV protein domain of the VPS23/TSG101 subunit. The assembly of the ESCRT-I complex is directed by the C-terminal steadiness box (SB) of VPS23, the N-terminal half of VPS28, and the C-terminal half of VPS37. The structure is primarily composed of three long, parallel helical hairpins, each corresponding to a different subunit. The additional domains and motifs extending beyond the core serve as gripping tools for ESCRT-I critical functions.
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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