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重组组织相容性抗原DQA1蛋白
本产品不向个人销售,仅用作科学研究,不用于任何人体实验及非科研性质的动物实验。

产品名称
重组组织相容性抗原DQA1/DQA2蛋白
Recombinant HLA-DQA1
产品介绍
基因名:

HLA-DQA1


产品别名:

CELIAC1; DQ-A1; DQA1; HLA-DQA; HLA-DQB1; HLA-DQA1; major histocompatibility complex, class II, DQ alpha 1; major histocompatibility complex, class II, DQ alpha 1; HLA class II histocompatibility antigen, DQ alpha 1 chain; DC-1 alpha chain; DC-alpha; HLA class II histocompatibility antigen DQ alpha chain; HLA-DCA; MHC HLA-DQ alpha; MHC class II DQ alpha chain; MHC class II DQA1; MHC class II HLA-DQ-alpha-1; MHC class II antigen DQA1; MHC class II protein; 组织相容性抗原DQA1; 组织相容性抗原DQA1/DQA2; 组织相容性抗原DQA2;


背景信息:
Binds peptides derived from antigens that access the endocytic route of antigen presenting cells (APC) and presents them on the cell surface for recognition by the CD4 T-cells. The peptide binding cleft accomodates peptides of 10-30 residues. The peptides presented by MHC class II molecules are generated mostly by degradation of proteins that access the endocytic route, where they are processed by lysosomal proteases and other hydrolases. Exogenous antigens that have been endocytosed by the APC are thus readily available for presentation via MHC II molecules, and for this reason this antigen presentation pathway is usually referred to as exogenous. As membrane proteins on their way to degradation in lysosomes as part of their normal turn-over are also contained in the endosomal/lysosomal compartments, exogenous antigens must compete with those derived from endogenous components. Autophagy is also a source of endogenous peptides, autophagosomes constitutively fuse with MHC class II loading compartments. In addition to APCs, other cells of the gastrointestinal tract, such as epithelial cells, express MHC class II molecules and CD74 and act as APCs, which is an unusual trait of the GI tract. To produce a MHC class II molecule that presents an antigen, three MHC class II molecules (heterodimers of an alpha and a beta chain) associate with a CD74 trimer in the ER to form an heterononamer. Soon after the entry of this complex into the endosomal/lysosomal system where antigen processing occurs, CD74 undergoes a sequential degradation by various proteases, including CTSS and CTSL, leaving a small fragment termed CLIP (class-II-associated invariant chain peptide). The removal of CLIP is facilitated by HLA-DM via direct binding to the alpha-beta-CLIP complex so that CLIP is released. HLA-DM stabilizes MHC class II molecules until primary high affinity antigenic peptides are bound. The MHC II molecule bound to a peptide is then transported to the cell membrane surface. In B cells, the interaction between HLA-DM and MHC class II molecules is regulated by HLA-DO. Primary dendritic cells (DCs) also to express HLA-DO. Lysosomal miroenvironment has been implicated in the regulation of antigen loading into MHC II molecules, increased acidification produces increased proteolysis and efficient peptide loading.

标签:His-tag   
分类:Recombinant  
类型:Protein   
偶联物:Unconjugated
内毒素水平:按批次,参阅瓶身标签
性状:Liquid
浓度:Batch dependent (Please refer to the vial label for the specific concentration.)
纯化类型:purified
内含物:不含防腐剂
应用:Positive Control;Immunogen;SDS-PAGE;WB.
储存:2-8°C不超过一个月,-80°C不超过12个月。避免反复冻融。
注意事项:仅供实验室使用。不适用于人类或动物的任何临床,治疗或诊断用途。不适合动物或人类食用。