Major histocompatibility complex class I molecule presenting glycoprotein 100 peptide epitope (MHC class I–gp100 peptide complex)

The major histocompatibility complex class I molecule is a cell surface receptor found on all nucleated cells that presents intracellularly derived peptide fragments (epitopes) to CD8+ cytotoxic T-cells[2][4][5][7]. When loaded with a peptide epitope derived from glycoprotein 100 (gp100)—a melanoma-associated antigen—this complex enables the immune system to recognize and potentially eliminate melanoma cells[7]. The complex consists of a polymorphic heavy chain, an invariant β2-microglobulin subunit, and a bound gp100 peptide (typically 8–10 amino acids)[2][4][5][6][7]. Upon display on the cell surface, it can trigger targeted immune responses, making it a crucial target for cancer immunotherapy and immune monitoring.

Other names

MHC class I–restricted gp100 epitopeHLA–gp100 peptide complex (if the MHC is human HLA types)gp100-MHC class I complex

Stimulation of cytotoxic T lymphocyte (CTL) response by enabling recognition of tumor or infected cells that present the gp100 epitope via MHC class I. Activation of CD8+ T-cells