RPLP0(核糖体蛋白大亚基P0,英文全称Ribosomal Protein Large P0)是一种高度保守的核糖体蛋白,属于核糖体大亚基(60S)的组成部分,参与蛋白质合成的关键过程。它属于P蛋白家族(P-stalk family),该家族成员(如RPLP1和RPLP2)共同形成核糖体的“P-stalk”结构,负责在翻译过程中与延伸因子(如eEF2)相互作用,促进mRNA的移位和肽链延伸。RPLP0的生物学功能主要体现在维持核糖体结构稳定性及调控翻译效率上。其表达产物作为“管家基因”(housekeeping gene)广泛存在于各类细胞中,常被用作内参基因(internal control)进行实验标准化。主要作用位点是核糖体大亚基的P0蛋白核心区域,与其他P蛋白(RPLP1/RPLP2)结合形成复合体。突变或异常表达可能破坏核糖体组装或功能,导致翻译缺陷,进而影响细胞增殖、分化甚至凋亡。研究发现RPLP0与多种疾病相关:过表达常见于癌症(如乳腺癌、肝癌),可能通过增强蛋白质合成促进肿瘤生长;而表达降低可能与某些神经退行性疾病(如阿尔茨海默病)中突触蛋白合成障碍有关。在基因家族层面,P蛋白家族的共性包括:1)酸性C端结构域(acidic C-terminal domain)负责与延伸因子结合;2)通过磷酸化调控翻译活性;3)进化上高度保守。若RPLP0过表达,可能通过提高全局翻译水平导致细胞异常增殖,同时可能抑制抑癌基因(如p53)的功能;反之,低表达会削弱核糖体功能,引发内质网应激(ER stress)或未折叠蛋白反应(UPR)。需要注意的是,由于RPLP0在基础代谢中的核心作用,其表达异常往往具有广泛的多效性影响。
Ribosomes, the organelles that catalyze protein synthesis, consist of a small 40S subunit and a large 60S subunit. Together these subunits are composed of 4 RNA species and approximately 80 structurally distinct proteins. This gene encodes a ribosomal protein that is a component of the 60S subunit. The protein, which is the functional equivalent of the E. coli L10 ribosomal protein, belongs to the L10P family of ribosomal proteins. It is a neutral phosphoprotein with a C-terminal end that is nearly identical to the C-terminal ends of the acidic ribosomal phosphoproteins P1 and P2. The P0 protein can interact with P1 and P2 to form a pentameric complex consisting of P1 and P2 dimers, and a P0 monomer. The protein is located in the cytoplasm. Transcript variants derived from alternative splicing exist; they encode the same protein. As is typical for genes encoding ribosomal proteins, there are multiple processed pseudogenes of this gene dispersed through the genome. [provided by RefSeq, Jul 2008]
核糖体,催化蛋白质合成的细胞器,由一个小40S亚基和60S大亚基。一起这些亚基组成的4 RNA种类和大约80结构不同的蛋白质。该基因编码一种核糖体蛋白,它是60S亚基的一个组成部分。蛋白质,它是大肠杆菌L10核糖体蛋白的功能等同属于L10P家庭核糖体蛋白的。它是一个中性磷蛋白具有C-末端是几乎相同的酸性核糖体磷蛋白P1和P2的C-末端。在P0蛋白可以与P1和P2相互作用以形成一个五聚体复合物组成的P1和P2二聚体和P0单体。该蛋白质位于细胞质中。从选择性剪接派生转录变异体存在;它们编码同一蛋白。作为典型编码核糖体蛋白的基因,有该基因通过基因组分散的多个经处理的假基因。 [由RefSeq的,2008年7月提供]
RPLP0基因(以及对应的蛋白质)的细胞分布位置:
RPLP0基因的本体(GO)信息:
名称 |
---|
3010 Ribosome [PATH:hsa03010] |
名称 |
---|
3' -UTR-mediated translational regulation |
Cap-dependent Translation Initiation |
Disease |
Eukaryotic Translation Elongation |
Eukaryotic Translation Initiation |
Eukaryotic Translation Termination |
Formation of a pool of free 40S subunits |
Gene Expression |
GTP hydrolysis and joining of the 60S ribosomal subunit |
Infectious disease |
Influenza Infection |
Influenza Life Cycle |
Influenza Viral RNA Transcription and Replication |
L13a-mediated translational silencing of Ceruloplasmin expression |
Metabolism of proteins |
Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) |
Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) |
Nonsense-Mediated Decay (NMD) |
Peptide chain elongation |
SRP-dependent cotranslational protein targeting to membrane |
Translation |
Viral mRNA Translation |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Liver carcinoma | 0.000814326 | 3 | 0 | BeFree |
Colorectal Cancer | 0.000542884 | 2 | 0 | BeFree |
Colorectal Carcinoma | 0.000542884 | 2 | 0 | BeFree |
Asthma | 0.000271442 | 1 | 0 | BeFree |
Carcinogenesis | 0.000271442 | 1 | 0 | BeFree |
leukemia | 0.000271442 | 1 | 0 | BeFree |
Non-Small Cell Lung Carcinoma | 0.000271442 | 1 | 0 | BeFree |
Colon Carcinoma | 0.000271442 | 1 | 0 | BeFree |
Secondary malignant neoplasm of liver | 0.000271442 | 1 | 0 | BeFree |
Hyperglycemia | 0.000271442 | 1 | 0 | BeFree |
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