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- Table of Contents
Facts about MHC class I polypeptide-related sequence A.
Ligand for the KLRK1/NKG2D receptor. Binding to KLRK1 leads to cell lysis.
Human | |
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Gene Name: | MICA |
Uniprot: | Q29983 |
Entrez: | 100507436 |
Belongs to: |
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MHC class I family |
FLJ60820; MGC111087; MICA; PERB11.1
Mass (kDA):
42.915 kDA
Human | |
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Location: | 6p21.33 |
Sequence: | 6; NC_000006.12 (31400711..31415315) |
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.
Cell membrane; Single-pass type I membrane protein. Cytoplasm. 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.
PMID: 8022771 by Bahram S., et al. A second lineage of mammalian major histocompatibility complex class I genes.
PMID: 8613147 by Bahram S., et al. Nucleotide sequence of the human MHC class I MICA gene.