Recombinant Human MICA Protein (His-tag) (Active)
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Recombinant Human MICA Protein (His-tag) (Active) is a Human Fragment protein, in the 24 to 308 aa range, expressed in HEK 293 cells, with >95%, <0.005 EU/µg endotoxin level, suitable for HPLC, SDS-PAGE, Mass Spec, FuncS.
View Alternative Names
PERB11.1, MICA, MHC class I polypeptide-related sequence A, MIC-A
- Biological Activity
Lab
Biological Activity - Recombinant Human MICA Protein (His-tag) (Active) (AB307786)
Loaded Human NKG2D, Fc Tag on Protein A Biosensor can bind Human MICA, His Tag with an affinity constant of 141 nM as determined in BLI assay (GatorBio Prime).
- Mass Spec
Supplier Data
Mass Spectrometry - Recombinant Human MICA Protein (His-tag) (Active) (AB307786)
Mass determination by ESI-TOF. Predicted MW is 34341.59 Da (+/-10 Da by ESI-TOF). Observed MW is 34348.97 Da.
- SDS-PAGE
Supplier Data
SDS-PAGE - Recombinant Human MICA Protein (His-tag) (Active) (AB307786)
SDS-PAGE analysis of ab307786
- HPLC
Supplier Data
HPLC - Recombinant Human MICA Protein (His-tag) (Active) (AB307786)
HPLC analysis of ab307786
Reactivity data
Sequence info
Properties and storage information
Shipped at conditions
Appropriate short-term storage conditions
Appropriate long-term storage conditions
Supplementary information
This supplementary information is collated from multiple sources and compiled automatically.
Biological function summary
The MICA protein acts as a ligand for the NKG2D receptor an activating receptor found on NK cells and some T-cell subsets. MICA does not require expression as part of a complex with β2-microglobulin for function. When cells express MICA they signal distress allowing immune cells to target and destroy potentially harmful cells such as those infected with viruses or transformed into cancer cells. This interaction is an important component of the immune surveillance system.
Pathways
MICA functions within the natural cytotoxicity effector pathway heavily involved in immune responses. It is also relevant in the DNA damage response pathways. Within these pathways MICA interacts with proteins like NKG2D and plays a part in mediating cellular responses to stress and damage. These interactions enhance the capacity of immune cells to recognize and eliminate abnormal cells.
Specifications
Form
Lyophilized
Additional notes
SDS-PAGE >= 95%
General info
Function
Widely expressed membrane-bound protein which acts as a ligand to stimulate an activating receptor KLRK1/NKG2D, expressed on the surface of essentially all human natural killer (NK), gammadelta T and CD8 alphabeta T-cells (PubMed : 11491531, PubMed : 11777960). Up-regulated in stressed conditions, such as viral and bacterial infections or DNA damage response, serves as signal of cellular stress, and engagement of KLRK1/NKG2D by MICA triggers NK-cells resulting in a range of immune effector functions, such as cytotoxicity and cytokine production (PubMed : 10426993).
Sequence similarities
Belongs to the MHC class I family. MIC subfamily.
Post-translational modifications
N-glycosylated. Glycosylation is not essential for interaction with KLRK1/NKG2D but enhances complex formation.. Proteolytically cleaved and released from the cell surface of tumor cells which impairs KLRK1/NKG2D expression and T-cell activation.. Palmitoylated on cysteine residues in the cytoplasmic tail leading to its association with membrane microdomains enriched in cholesterol.. N-glycosylation is necessary for cell surface expression.. (Microbial infection) Ubiquitinated by human herpesvirus 8 protein K5, leading to degradation.
Target data
Product promise
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