Human MICA ELISA Kit | MICA elisa kit

MICA Human ELISA Kit

Cat. Num. AAA355266

• Gene Names: MICA; MIC-A; PERB11.1
• Reactivity: Human
• Applications: ELISA
• Synonyms: MICA; MICA Human ELISA Kit; Human MICA; MICA elisa kit

• Reactivity: Human

• Applicable Applications for MICA elisa kit: Quantitative sELISA (EIA)
• Application Notes: For quantitative detection of MICA in tissue lysates or cell culture supernates, human serum and plasma should be validated by end users.
• Assay Type: Sandwich
• Detection Range: 62.5 pg/ml-4000 pg/ml
• Sensitivity: < 10pg/ml
• Preparation and Storage: Store at 2-8 degree C for 4 months, or at -20 degree C for 8 months.

Typical Testing Data/Standard Curve (for reference only)

Related Product Information for MICA elisa kit

Principle of the Assay: This kit was based on sandwich enzyme-linked immune-sorbent assay technology. Anti-MICA polyclonal antibody was pre-coated onto 96-well plates. And the biotin conjugated anti-MICA polyclonal antibody was used as detection antibodies. The standards, test samples and biotin conjugated detection antibody were added to the wells subsequently, and wash with wash buffer. Avidin-Biotin-Peroxidase Complex was added and unbound conjugates were washed away with wash buffer. TMB substrates were used to visualize HRP enzymatic reaction. TMB was catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the MICA amount of sample captured in plate. Read the O.D. absorbance at 450nm in a microplate reader, and then the concentration of MICA can be calculated.

Background: MHC class I polypeptide-related sequence A(MICA) is a protein that in humans is encoded by the MICA gene. The MICA gene is located near HLA-B on chromosome 6. Nalabolu et al. (1996) showed that the MICA and MICB (602436) genes occur in a 200-kb region spanning the TNFA (191160) and TNFB (153440) cluster at chromosome 6p21.3. The protein product is expressed on the cell surface, although unlike canonical class I molecules does not seem to associate with beta-2-microglobulin. It is thought that MICA functions as a stress-induced antigen that is broadly recognized by NK cells, NKT cells, and most of the subtypes of T cells. MICA is the ligand for NK cell activating receptor NKG2D.

NCBI and Uniprot Product Information

• NCBI GI #: 3850728
• NCBI GeneID: 100507436
• UniProt Accession #: Q29983; O60917; O60918; O60919; O60920; O60933; O77956; O78150; A8KQR0; A9LRW5; A9QVE0; B1VJF1
• Molecular Weight: 42,915 Da
• NCBI Official Full Name: MICA
• NCBI Official Synonym Full Names: MHC class I polypeptide-related sequence A
• NCBI Official Symbol: MICA
• NCBI Official Synonym Symbols: MIC-A; PERB11.1
• NCBI Protein Information: MHC class I polypeptide-related sequence A; HLA class I antigen; stress inducible class I homolog; MHC class I chain-related protein A
• UniProt Protein Name: MHC class I polypeptide-related sequence A
• Protein Family: MICAL-like protein
• UniProt Gene Name: MICA
• UniProt Synonym Gene Names: PERB11.1; MIC-A
• UniProt Entry Name: MICA_HUMAN

NCBI Description

MICA encodes the higly polymorphic MHC (HLA) class I chain-related gene A. The protein product is expressed on the cell surface, although unlike canonical class I molecules does not seem to associate with beta-2-microglobulin. It is thought that MICA functions as a stress-induced antigen that is broadly recognized by intestinal epithelial gamma delta T cells. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2010]

Uniprot Description

Function: Seems to have no role in antigen presentation. Acts as a stress-induced self-antigen that is recognized by gamma delta T-cells. Ligand for the KLRK1/NKG2D receptor. Binding to KLRK1 leads to cell lysis. Ref.28 Ref.32 Ref.39

Subunit structure: Unlike classical MHC class I molecules, does not form a heterodimer with beta-2-microglobulin. Binds as a monomer to a KLRK1/NKG2D homodimer. KLRK1 forms a complex with HCST/DAP10 in which KLRK1 binds MICA while HCST acts as an adapter molecule which enables signal transduction. Interacts with PDIA6 on the surface of tumor cells, leading to disulfide bond reduction which is required for release of MICA from tumor cells. Interacts with human cytomegalovirus/HHV-5 protein UL142. Ref.26 Ref.27 Ref.32 Ref.33 Ref.35 Ref.36 Ref.39 Ref.48

Subcellular location: Cell membrane; Single-pass type I membrane protein. Cytoplasm. Note: Expressed on the cell surface in gastric epithelium, endothelial cells and fibroblasts and in the cytoplasm in keratinocytes and monocytes. Infection with human adenovirus 5 suppresses cell surface expression due to the adenoviral E3-19K protein which causes retention in the endoplasmic reticulum. Ref.26 Ref.30 Ref.39 Ref.50

Tissue specificity: Widely expressed with the exception of the central nervous system where it is absent. Expressed predominantly in gastric epithelium and also in monocytes, keratinocytes, endothelial cells, fibroblasts and in the outer layer of Hassal's corpuscles within the medulla of normal thymus. In skin, expressed mainly in the keratin layers, basal cells, ducts and follicles. Also expressed in many, but not all, epithelial tumors of lung, breast, kidney, ovary, prostate and colon. In thyomas, overexpressed in cortical and medullar epithelial cells. Tumors expressing MICA display increased levels of gamma delta T-cells. Ref.26 Ref.27 Ref.30 Ref.31 Ref.34 Ref.39 Ref.45 Ref.49

Induction: By heat shock, by infection with human cytomegalovirus (HCMV), human adenovirus 5, M.tuberculosis and diarrheagenic E.coli, and by exposure to DNA damaging conditions such as high doses of ionizing radiation, chromatin-modifying treatments and inhibitors of DNA replication. The HCMV UL142 protein causes down-regulation of the full-length protein but not of the truncated MICA*008 allele. Ref.26 Ref.27 Ref.28 Ref.30 Ref.32 Ref.33 Ref.38 Ref.39 Ref.40 Ref.44 Ref.46 Ref.47 Ref.50

Post-translational modification: N-glycosylated. Glycosylation is not essential for interaction with KLRK1/NKG2D but enhances complex formation. Ref.26 Ref.39Proteolytically cleaved and released from the cell surface of tumor cells which impairs KLRK1/NKG2D expression and T-cell activation. Ref.42 Ref.43

Polymorphism: The following alleles of MICA are known: MICA*001, MICA*002, MICA*004, MICA*005, MICA*006, MICA*007, MICA*008, MICA*009, MICA*010, MICA*011, MICA*012, MICA*013, MICA*014, MICA*015, MICA*016, MICA*017, MICA*018, MICA*019, MICA*020, MICA*022, MICA*023, MICA*024, MICA*025, MICA*026, MICA*027, MICA*028, MICA*029, MICA*030, MICA*031, MICA*032, MICA*033, MICA*034, MICA*035, MICA*036, MICA*037, MICA*038, MICA*039, MICA*040, MICA*041, MICA*042, MICA*043, MICA*044, MICA*045, MICA*046, MICA*047, MICA*048, MICA*049, MICA*050, MICA*051, MICA*052, MICA*053, MICA*054, MICA*055 and MICA*056. The sequence shown is that of MICA*001.

Involvement in disease: Anti-MICA antibodies and ligand shedding are involved in the progression of monoclonal gammopathy of undetermined significance (MGUS)to multiple myeloma.Psoriasis 1 (PSORS1) [MIM:177900]: A common, chronic inflammatory disease of the skin with multifactorial etiology. It is characterized by red, scaly plaques usually found on the scalp, elbows and knees. These lesions are caused by abnormal keratinocyte proliferation and infiltration of inflammatory cells into the dermis and epidermis.Note: Disease susceptibility is associated with variations affecting the gene represented in this entry.Psoriatic arthritis (PSORAS) [MIM:607507]: An inflammatory, seronegative arthritis associated with psoriasis. It is a heterogeneous disorder ranging from a mild, non-destructive disease to a severe, progressive, erosive arthropathy. Five types of psoriatic arthritis have been defined: asymmetrical oligoarthritis characterized by primary involvement of the small joints of the fingers or toes; asymmetrical arthritis which involves the joints of the extremities; symmetrical polyarthritis characterized by a rheumatoid like pattern that can involve hands, wrists, ankles, and feet; arthritis mutilans, which is a rare but deforming and destructive condition; arthritis of the sacroiliac joints and spine (psoriatic spondylitis).Note: Disease susceptibility is associated with variations affecting the gene represented in this entry.

Miscellaneous: Recognized by antibodies in the sera of some organ transplant recipients and may be a target molecule in allograft rejection. Ref.35

Sequence similarities: Belongs to the MHC class I family. MIC subfamily.Contains 1 Ig-like C1-type (immunoglobulin-like) domain.