MHC Class 1 Chain-related Gene A Active Protein | MICA active protein

MHC Class 1 Chain-related Gene A, Recombinant, Human (MICA)

Cat. Num. AAA637328

• Gene Names: MICA; MIC-A; PERB11.1
• Purity: Highly Purified; 95% as determined by RP-HPLC, anion-exchange FPLC and/or reducing and non-reducing SDS-PAGE Silver Stained gel.
• Synonyms: MHC Class 1 Chain-related Gene A; Recombinant; Human (MICA); MICA active protein

• Host: E Coli
• Purity/Purification: Highly Purified; 95% as determined by RP-HPLC, anion-exchange FPLC and/or reducing and non-reducing SDS-PAGE Silver Stained gel.
• Form/Format: Supplied as a lyophilized powder without additives.

• Biological Activity: Recombinant Human MICA is fully biologically active when compared to standards. Measured by its ability to bind MICA antibody in ELISA.
• Dimers and Aggregates: Less than 1% as determined by silver-stained SDS-PAGE gel analysis.
• Endotoxin Level: 0.1ng/ug (IEU/ug) of Recombinant Human MICA.
• Protein Content: Protein quantitation was carried out by two independent methods:; 1. UV spectroscopy at 280 nm.; 2. Analysis by RP-HPLC, using a standard solution of MICA as a Reference Standard.
• Solubility: It is recommended to reconstitute the lyophilized MICA in sterile 18M -cm H2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions.
• Preparation and Storage: -20 degree C; Stability: Lyophilized Recombinant Human MHC although stable at room temperature for 3 weeks, should be stored desiccated below -180C. Upon reconstitution MHC should be stored at 40C between 2-7 days and for future use below -180C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Please avoid freeze-thaw cycles.

Related Product Information for MICA active protein

MICA (MHC class I chain-related gene A) is a transmembrane glycoprotein that functions as a ligand for human NKG2D. A closely related protein, MICB, shares 85% amino acid identity with MICA. These proteins are distantly related to the MHC class I proteins. They possess three extracellular Ig-like domains, but they have no capacity to bind peptide or interact with 2-microglobulin. The genes encoding these proteins are found within the Major Histocompatibility Complex on human chromosome 6. The MICA locus is highly polymorphic with more than 50 recognized human alleles. MICA is absent from most cells but is frequently expressed in epithelial tumors and can be induced by bacterial and viral infections. MICA is a ligand for human NKG2D, an activating receptor expressed on NK cells, NKT cells, T cells, and CD8+ T cells. Recognition of MICA by NKG2D results in the activation of cytolytic activity and/or cytokine production by these effector cells. MICA recognition is involved in tumor surveillance, viral infections, and autoimmune diseases.

Recombinant Human MICA produced in E.Coli is a single, non-glycosylated polypeptide chain containing 320 amino acids and having a molecular mass of 36kD. The sequence contains the extracellular domain of the mature human MICA (amino acid residues Ala23 - Gln308). Recombinant Human MICA is purified by proprietary chromatographic techniques.

Product Categories/Family for MICA active protein

Molecular Biology; MB-Carbohydrates; Glycoproteins

NCBI and Uniprot Product Information

• NCBI GI #: 4557751
• NCBI GeneID: 100507436
• NCBI Accession #: NP_000238.1
• NCBI GenBank Nucleotide #: NM_000247.1
• UniProt Accession #: Q29983; O60917; O60918; O60919; O60920; O60933; O77956; O78150; A8KQR0; A9LRW5; A9QVE0; B1VJF1
• Molecular Weight: 36kD
• NCBI Official Full Name: MHC class I polypeptide-related sequence A isoform 1 (MICA*001)
• 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: Microperfuranone synthase
• 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

MICA: 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. Anti-MICA antibodies and ligand shedding are involved in the progression of monoclonal gammopathy of undetermined significance (MGUS)to multiple myeloma. Genetic variations in MICA may be a cause of susceptibility to psoriasis type 1 (PSORS1). Psoriasis is 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. Genetic variation in MICA is a cause of susceptibility to psoriatic arthritis (PSORAS). PSORAS is 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 rheumatoidlike 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). Belongs to the MHC class I family. MIC subfamily. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Membrane protein, integral

Chromosomal Location of Human Ortholog: 6p21.33

Cellular Component: extracellular space; cell surface; integral to plasma membrane; cytoplasm

Molecular Function: protein binding; beta-2-microglobulin binding; antigen binding; natural killer cell lectin-like receptor binding

Biological Process: antigen processing and presentation; viral reproduction; natural killer cell mediated cytotoxicity; response to heat; cytolysis; defense response to bacterium; immune response to tumor cell; response to DNA damage stimulus; defense response to virus; gamma-delta T cell activation; T cell mediated cytotoxicity

Disease: Psoriatic Arthritis, Susceptibility To; Psoriasis 1, Susceptibility To