Pre-proinsulin peptide–HLA-A*02:01 complex

The pre-proinsulin peptide–HLA-A*02:01 complex is a molecular complex formed by the binding of an epitope from human preproinsulin (commonly the 3–11 region, such as LWMRLLPLL) to the HLA-A*02:01 major histocompatibility complex class I molecule. This complex is presented on the surface of cells (notably pancreatic beta cells) and can be specifically recognized by CD8+ T cell receptors. In type 1 diabetes, autoreactive cytotoxic T cells target these complexes, leading to immune-mediated destruction of insulin-producing beta cells. The complex represents a key autoimmune target and is a central mechanistic component in the pathogenesis of type 1 diabetes[2][4]. Molecular mimicry with microbial peptides may also break immune tolerance, contributing to disease initiation[4]. Key considerations: - This entry describes a peptide–MHC (major histocompatibility complex) complex, not a traditional 'single protein' drug target like a receptor or enzyme. It is, however, the functional epitope recognized by pathogenic T cells in type 1 diabetes[2][4]. - Therapeutic strategies (including engineered T cell receptors, immune tolerance induction, or peptide-based immunomodulation) may target this complex, but there are no approved drugs directly targeting it[2][4]. - As a peptide–MHC complex, it is highly relevant in immunology and autoimmunity research, but not typically considered a canonical pharmacological molecular target (hence is_incorrect: true). If you require a strictly canonical protein target (like "Insulin" or "HLA-A*02:01"), the above entry is too complex/specific as given. If you require antigen/MHC complexes driving T cell responses, this entry is relevant but does not fit standardized molecular target databases.

Other names

Preproinsulin 3–11–HLA-A*02:01 complexPPI 3–11–HLA-A*02:01 complexPreproinsulin peptide–HLA class I complexHLA-A*02:01 preproinsulin complexPPI–HLA-A*02 complex

T cell recognition (CD8+ cytotoxic T lymphocyte activation via recognition of the complex by T cell receptor)