Intermediate filament protein (IF protein)

Intermediate filament proteins are a diverse family of cytoskeletal and nucleoskeletal proteins found in nearly all animal cells, where they assemble into 10 nm filaments that are crucial for providing mechanical strength, maintaining cell shape, supporting cell adhesion, and anchoring organelles[1][3][5]. There are more than 70 intermediate filament genes in humans, and the protein family is classified into cytoplasmic (Types I-IV) and nuclear (Type V, lamins) subtypes, including tissue-specific forms such as keratins (epithelia), vimentin (mesenchyme), neurofilaments (neurons), desmin (muscle), and glial fibrillary acidic protein (astrocytes)[2][6]. Mutations in specific intermediate filament proteins cause over 80 human diseases, many with tissue- or cell-type specificity[2][8]. Intermediate filament proteins do not act as receptors, enzymes, channels, or transporters; instead, they serve structural roles and are important for cellular mechanotransduction, cell integrity, and as tissue/cell biomarkers[4][7]. Despite their central biological functions, "intermediate filament protein" is not a single defined molecular target, but rather refers to a protein family with many members; thus, as a precise drug discovery or therapeutic target name, it is non-specific and potentially incorrect or incomplete in technical contexts[2][5][6].

Other names

Intermediate filamentIFcytoskeletal intermediate filament proteincytoskeletal IF protein