PSME3 - proteasome activator subunit 3 Gene

中文名称：蛋白酶体激活子亚基 3

种属: Homo sapiens

同用名: Ki; PA28G; HEL-S-283; PA28gamma; REG-GAMMA; PA28-gamma

关于 PSME3

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。免疫蛋白酶体包含替代调节剂，称为 11S 调节剂或 PA28，它取代了 19S 调节剂。已确定 11S 调节器的三个亚基 (α、β 和γ) 。该基因编码 11S 调节器的 γ 亚基。六个 γ 亚基结合形成同型六聚体环。交替剪接导致多个转录本变体。[RefSeq 提供，2012 年 5 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. The immunoproteasome contains an alternate regulator, referred to as the 11S regulator or PA28, that replaces the 19S regulator. Three subunits (alpha, beta and gamma) of the 11S regulator have been identified. This gene encodes the gamma subunit of the 11S regulator. Six gamma subunits combine to form a homohexameric ring. Alternate splicing results in multiple transcript variants. [provided by RefSeq, May 2012]