CD81 抗体 (YA525) (HY-P80608)

CD81; TAPA1; TSPAN28; CD81 antigen; 26 kDa cell surface protein TAPA-1; Target of the antiproliferative antibody 1; Tetraspanin-28; Tspan-28; CD81

反应种属:Human
抗原名称:CD81
应用:WB, FCM, IF/ICC, IHC-P
标记:Unconjugated

用户验证的应用

经验证应用

项目详情
WBWestern blot analysis of extracts from Raji (lane2(20μg), HL-60 (lane3(20μg), HepG2 (lane4(20μg) and HCT116 (lane5(20μg) using CD81 Antibody ( HY-P80608 ). Proteins were transferred to a PVDF membrane and blocked with 5% non-fat milk in TBST at 4°C overnight. The primary antibody (1/1000) and Loading control antibody (Beta Actin, HY-P80993, 1/10,000) was used in 5% non-fat milk in TBST for 2 hour at room temperature. Goat Anti-Rabbit IgG-HRP Secondary Antibody (HY-P8001, 1/10,000) was used for 1 hour at room temperature.
IHC-PImmunohistochemical analysis of paraffin-embedded mouse testis tissue using CD81 Antibody. The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 8.0) for 8 minutes. The tissues were blocked in QuickBlock for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody at 1/100 dilution in 4℃ overnight. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
ICCImmunocytochemistry analysis of C2C12 cells labeling CD81 with CD81 Antibody ( HY-P80608 ) at 1/50 dilution. Cells were fixed in 4% paraformaldehyde for 15 minutes at room temperature, permeabilized with 0.1% Triton X-100 for 10 minutes at room temperature, then blocked with QuickBlock™ Blocking Buffer for Immunol Staining for 10 min at room temperature. Cells were then incubated with CD81 Antibody ( HY-P80608 ) at 1/50 dilution in QuickBlock™ Blocking Buffer for Immunol Staining at 4 ℃. Alexa Fluor® 488-conjugated AffiniPure Goat Anti-Rabbit IgG H&L(HY-P8002, Green) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. The Nuclear counterstain was DAPI (Blue). Immunocytochemistry analysis of SHSY5Y cells labeling CD81 with CD81 Antibody ( HY-P80608 ) at 1/50 dilution. Cells were fixed in 4% paraformaldehyde for 15 minutes at room temperature, permeabilized with 0.1% Triton X-100 for 10 minutes at room temperature, then blocked with QuickBlock™ Blocking Buffer for Immunol Staining for 10 min at room temperature. Cells were then incubated with CD81 Antibody ( HY-P80608 )at 1/50 dilution in QuickBlock™ Blocking Buffer for Immunol Staining at 4 ℃. Alexa Fluor® 488-conjugated AffiniPure Goat Anti-Rabbit IgG H&L(HY-P8002,Green) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. The Nuclear counterstain was DAPI (Blue).

详细信息

免疫原Synthetic peptide corresponding to Human CD81 aa34-63 & aa113-201.
宿主/亚型Rabbit / IgG
抗体类型Recombinant,Monoclonal
产品形式溶液
偶联物Non-conjugated
纯化方式affinity purified
浓度不同批次浓度可能有所不同,具体浓度请参见对应批次的COA。 批次浓度查询
储存缓冲液Supplied in 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol and 0.05% BSA. Preservative: 0.01% Sodium azide
储存条件保存条件 & 期限: Stored at -20°C for 1 year. Avoid repeated freeze / thaw cycles. 运输条件: Shipping with blue ice.
RRIDAB_3102629
UniProt IDP60033
Gene ID975 [ NCBI ]

背景信息

功能: CD81 是被称为四次跨膜蛋白富集微结构域 (TERM) 的特化膜微结构域的结构组分,这类微结构域是受体聚集和信号转导的平台。它对活化 B 细胞表面 CD19 受体的转运和区室化至关重要。初次接触微生物病原体时,CD81 可促进 CD19-CR2/CD21 复合物与 B 细胞受体 (BCR) 复合物在信号转导 TERM 处组装,降低触发 B 细胞克隆扩增和抗体产生所需的抗原阈值剂量。在 T 细胞中,CD81 可促进 CD247/CD3ζ 定位于抗原诱导的与 B 细胞形成的免疫突触处,为共刺激和向 2 型辅助性 T 细胞表型极化提供支持。CD81 存在于 MHC II 类区室中,也可能在抗原呈递中发挥作用。它可正调控或负调控同型或异型细胞-细胞融合过程:正调控精卵融合,还可能参与顶体反应;在成肌细胞中,CD81 与 CD9、PTGFRN 结合,在肌肉再生过程中抑制肌管融合;在巨噬细胞中,CD81 与 CD9、β1 整合素、β2 整合素结合,阻止巨噬细胞融合为专门吞噬补体调理的大颗粒的多核巨细胞,还可阻止单核细胞祖细胞融合为负责骨吸收的破骨细胞。CD81 还可调控酶活性的区室化:在 T 细胞中,它决定 dNTP 酶 SAMHD1 的亚细胞定位,使其可被蛋白酶体降解,从而调控细胞内 dNTP 水平。它也参与细胞黏附和迁移,正调控整合素介导的巨噬细胞黏附,这对肺部炎症反应尤为重要。(微生物感染相关功能) 在肝细胞中作为丙型肝炎病毒 (HCV) 的受体发挥作用,与 CLDN1 结合形成的 CLDN1-CD81 受体复合物是 HCV 进入宿主细胞的必要条件;(微生物感染相关功能) 参与 SAMHD1 依赖的 HIV-1 复制限制过程,可能通过蛋白酶体依赖的 SAMHD1 降解,支持 R5 嗜性和 X4 嗜性 HIV-1 病毒在 T 细胞中的早期复制;(微生物感染相关功能) 是恶性疟原虫感染肝细胞的特异性必需因子,可调控子孢子通过纳虫空泡进入肝细胞,以及后续寄生虫分化为红外期形态的过程 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] 。 亚细胞定位: 细胞膜;多通道膜蛋白;基底外侧细胞膜;多通道膜蛋白 表达水平: 组织特异性:在 B 细胞上表达 (蛋白水平) (PubMed:20237408) 。在肝细胞上表达 (蛋白水平) (PubMed:12483205) 。在单核细胞/巨噬细胞上表达 (蛋白水平) (PubMed:12796480) 。在初始和记忆性 CD4 阳性 T 细胞上均有表达 (蛋白水平) (PubMed:22307619) 。 亚基: 同源二聚体 (PubMed:20375010)。成熟 B 细胞膜上由 CD19、CR2/CD21、CD81 和 IFITM1/CD225 组成的复合物的一部分。通过第二个胞外结构域与 CD19 相互作用;这种相互作用在内质网生物合成早期启动,并仅允许正确折叠的 CD19 进行转运 (PubMed:1383329, PubMed:16449649)。包含 MHC II 类/HLA-DR 分子和 IFITM1 的复合物的一部分 (PubMed:8409388)。与 IFITM1 相互作用 (PubMed:2398277, PubMed:26354436)。与 IFITM2 和 IFITM3 相互作用 (基于相似性)。单核细胞/巨噬细胞膜上由 CD9、CD81、β-1 和 β-2 整合素组成的整合素-四跨膜蛋白复合物的组成部分 (PubMed:12796480)。通过其第二个胞外结构域与整合素 ITGAV:ITGB3 相互作用 (PubMed:27993971)。在 T 细胞膜的免疫突触处与 CD247/CD3ζ、ICAM1 和 CD9 相互作用 (PubMed:23858057)。至少由 ADGRG1、CD81、可能还有 CD9 和 GNA11 组成的 GPCR-四跨膜蛋白复合物的组成部分,其中 CD81 增强 ADGRG1 与 GNA11 的结合 (PubMed:15004227)。由 CD9、CD81、PTGFRN 和 IGSF8 组成的复合物的组成部分 (基于相似性)。直接与 IGSF8 相互作用 (PubMed:11504738)。与 CD53 和 SCIMP 相互作用 (PubMed:21930792)。与 SAMHD1 (通过其 C 端) 相互作用 (PubMed:28871089)。与糖蛋白聚糖 GPC3 和转录抑制因子 HHEX 相互作用;与 GPC3 结合会降低游离 CD81 与 HHEX 结合的可用性,从而导致 HHEX 核转位和转录抑制 (基于相似性)。与 CLDN1 相互作用 (PubMed:20375010, PubMed:21516087)。与 CLDN6 和 CLDN9 相互作用 (PubMed:20375010)。