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50T
| 产品编号 | IHC0645M |
| 英文名称 | Mouse EIF2S1 Ready-To-Use IHC Kit |
| 中文名称 | 小鼠真核启动因子2α(eIFα2)即用型免疫组化试剂盒 |
| 英文别名 | 0910001O23Rik; 2410026C18Rik; 35kDa; EIF-2; EIF-2A; EIF-2alpha; EIF2; EIF2A; eIF2alpha; EIF2S1; eukaryotic translation initiation factor 2 subunit 1 |
| 产品应用 | IHC-P Not yet tested in other applications. |
| 交叉反应 | Mouse |
| 亚基 | Eukaryotic translation initiation factor 2 eIF2 is a heterotrimeric complex composed of an alpha (EIF2S1), a beta (EIF2S2) and a gamma (EIF2S3) chain (PubMed:23063529, PubMed:31048492, PubMed:31836389, PubMed:35031321). eIF2 is member of the 43S pre-initiation complex (43S PIC). eIF2 forms a complex with at least CELF1/CUGBP1, CALR, CALR3, EIF2S1, EIF2S2, HSP90B1 and HSPA5 (By similarity). Interaction with METAP2 protects EIF2S1 from inhibitory phosphorylation (By similarity). Interacts with ABCF1 isoform 2 (PubMed:17894550). Associates with ribosomes (PubMed:17894550). Interacts with DDX3X in an RNA-independent manner (PubMed:18596238). Interacts with CDC123 (PubMed:31836389, PubMed:35031321). (Microbial infection) Interacts with rotavirus A non-structural protein 2; this interaction probably plays a role in the sequestration of IF2A in viral factories (PubMed:30258011). Interacts with rotavirus A non-structural protein 5; this interaction probably plays a role in its sequestration in viral factories (PubMed:30258011). |
| 亚细胞定位 | #Cytoplasm #Mitochondrion |
| 翻译后修饰 | Phosphorylation at Ser-49 and Ser-52 stabilizes the eIF-2/GDP/eIF2B complex and prevents GDP/GTP exchange reaction, thus impairing the recycling of eIF-2 between successive rounds of initiation and leading to global inhibition of translation, while concomitantly initiating the preferential translation of integrated stress response (ISR)-specific mRNAs (PubMed:10026192, PubMed:15207627, PubMed:18032499, PubMed:19131336, PubMed:31048492). Substrate for at least 4 kinases: EIF2AK1/HRI, EIF2AK2/PKR, EIF2AK3/PERK and EIF2AK4/GCN2 (PubMed:15489334, PubMed:38340717). Phosphorylation on Ser-52 by the EIF2AK4/GCN2 protein kinase occurs in response to amino acid starvation and UV irradiation (By similarity). Phosphorylation at Ser-52 by the EIF2AK3/PERK protein kinase occurs in response to the unfolded protein response (PubMed:10026192). Phosphorylation at Ser-52 by EIF2AK1/HRI in response to mitochondrial damage promotes relocalization to the mitochondrial surface (PubMed:38340717).By Similarity6 Publications (Microbial infection) Phosphorylation by vaccinia virus protein E3 and rotavirus A stabilizes the eIF-2/GDP/eIF2B complex and prevents GDP/GTP exchange reaction, thus impairing the recycling of eIF-2 between successive rounds of initiation and leading to global inhibition of translation. |
| 相似性 | Belongs to the eIF-2-alpha family. |
| 功能 | Member of the eIF2 complex that functions in the early steps of protein synthesis by forming a ternary complex with GTP and initiator tRNA (PubMed:16289705, PubMed:38340717). This complex binds to a 40S ribosomal subunit, followed by mRNA binding to form a 43S pre-initiation complex (43S PIC) (PubMed:16289705). Junction of the 60S ribosomal subunit to form the 80S initiation complex is preceded by hydrolysis of the GTP bound to eIF2 and release of an eIF2-GDP binary complex (PubMed:16289705). In order for eIF2 to recycle and catalyze another round of initiation, the GDP bound to eIF2 must exchange with GTP by way of a reaction catalyzed by eIF2B (PubMed:16289705). EIF2S1/eIF2-alpha is a key component of the integrated stress response (ISR), required for adaptation to various stress: phosphorylation by metabolic-stress sensing protein kinases (EIF2AK1/HRI, EIF2AK2/PKR, EIF2AK3/PERK and EIF2AK4/GCN2) in response to stress converts EIF2S1/eIF2-alpha in a global protein synthesis inhibitor, leading to an attenuation of cap-dependent translation, while concomitantly initiating the preferential translation of ISR-specific mRNAs, such as the transcriptional activators ATF4 and QRICH1, and hence allowing ATF4- and QRICH1-mediated reprogramming (PubMed:19131336, PubMed:33384352, PubMed:38340717). EIF2S1/eIF2-alpha also acts as an activator of mitophagy in response to mitochondrial damage: phosphorylation by EIF2AK1/HRI promotes relocalization to the mitochondrial surface, thereby triggering PRKN-independent mitophagy (PubMed:38340717). |
| 保存条件 | Please store components at the temperatures indicated on the individual tube labels. The kit is stable for 6 months from the date of receipt. |
| 背景资料 | EIF2a (Eukaryotic translation initiation factor 2A) is a heterotrimer composed of three subunits (alpha, beta, and gamma). This translation initiation factor drives binding of initiator methionyl-tRNA to the 40S ribosome in an AUG-dependent manner to form the 43S pre-initiation complex. The polypeptide can be phosphorylated by related protein kinases activated in response to stress. Phosphorylated EIF2A inhibits EIF2B activity and prevents guanine nucleotide exchange. |
| 应用 | 推荐稀释比例 |
Immunohistochemical analysis of paraffin embedded Mouse brain tissue slide using IHC0645M (Mouse EIF2S1 Kit).
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Mouse EIF2S1 Ready-To-Use IHC Kit(IHC0645M)-50T
￥3200
