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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Retroviral matrix protein ： ウィキペディア英語版 Retroviral matrix protein Retroviral matrix proteins are components of envelope-associated capsids of retroviruses. These proteins line the inner surface of viral envelopes and are associated with viral membranes. Matrix proteins are produced as N-terminal domains of Gag precursor polyproteins. The Gag polyprotein directs the assembly and release of virus particles from infected cells. The Gag polyprotein has three domains required for activity: an N-terminal membrane-binding (M) domain (which corresponds to the matrix protein) that directs Gag to the plasma membrane, an interaction (I) domain involved in Gag aggregation, and a late assembly (L) domain that mediates the budding process . During viral maturation, the Gag polyprotein is cleaved by the retroviral protease into several corresponding structural proteins, yielding the matrix (MA), capsid (CA), and nucleocapsid (NC) proteins, and some smaller peptides. Gag-derived proteins govern the entire assembly and release of the virus particles, with matrix proteins playing key roles in Gag stability, capsid assembly, transport and budding. ==Families of retroviral matrix proteins== Although matrix proteins from different viruses appear to perform similar functions and can have similar structural folds, their primary sequences can be very different. Typical matrix proteins of retroviruses form an alpha helical bundle structure . One family of these proteins represents matrix proteins from gammaretroviruses, such as ''Moloney murine leukemia virus'' (MoMLV), ''feline leukemia virus'' (FLV), and ''feline sarcoma virus'' (FESV). This family also includes matrix proteins from several eukaryotic endogenous retroviruses, which arise when one or more copies of the retroviral genome becomes integrated into the host genome. Another family represents the M domain of the Gag polyprotein found in avian retroviruses. It includes Gag polyproteins from several avian endogenous retroviruses. Matrix proteins are also components of beta-retroviruses such as ''Mason-Pfizer monkey virus'' (MPMV) and ''mouse mammary tumor virus'' (MMTV) . This entry also identifies matrix proteins from several eukaryotic endogenous retroviruses.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Retroviral matrix protein」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.