PSMD2 - proteasome 26S subunit ubiquitin receptor, non-ATPase 2 Gene

中文名称：蛋白酶体 26S 亚基泛素受体，非 ATPase 2

种属: Homo sapiens

同用名: S2; P97; RPN1; TRAP2

关于 PSMD2

功能概要

26S 蛋白酶体是一种多催化蛋白酶复合物，具有由 2 个复合物、20S 核心和 19S 调节剂组成的高度有序结构。 20S 核心由 28 个不同亚基的 4 个环组成； 2 个环由 7 个α亚基组成，2 个环由 7 个β亚基组成。 19S 调节器由一个包含 6 个 ATP 酶亚基和 2 个非 ATP 酶亚基的碱基和一个包含多达 10 个非 ATP 酶亚基的盖子组成。蛋白酶体以高浓度分布在整个真核细胞中，并在非溶酶体途径中以 ATP/泛素依赖性过程切割肽。修饰的蛋白酶体 (免疫蛋白酶体) 的基本功能是加工 I 类 MHC 肽。该基因编码 19S 调节器盖的非 ATP 酶亚基之一。除了参与蛋白酶体功能外，该亚基还可能参与 TNF 信号通路，因为它与肿瘤坏死因子 1 型受体相互作用。已在 1 号染色体上鉴定出一个假基因。可变剪接导致该基因的多个转录变体。[RefSeq 提供，2013 年 7 月]

The 26S Proteasome is a multicatalytic proteinase complex with a highly ordered structure composed of 2 complexes, a 20S core and a 19S regulator. The 20S core is composed of 4 rings of 28 non-identical subunits; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. The 19S regulator is composed of a base, which contains 6 ATPase subunits and 2 non-ATPase subunits, and a lid, which contains up to 10 non-ATPase subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave Peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified Proteasome, the immunoproteasome, is the processing of class I MHC Peptides. This gene encodes one of the non-ATPase subunits of the 19S regulator lid. In addition to participation in Proteasome function, this subunit may also participate in the TNF signalling pathway since it interacts with the tumor necrosis factor type 1 receptor. A pseudogene has been identified on chromosome 1. Alternative splicing results in multiple transcript variants of this gene. [provided by RefSeq, Jul 2013]