Z-disc protein

Z-disc proteins refer to a large and heterogenous group of structural and signaling proteins concentrated at the Z-disc (or Z-line), which delineates the boundary of sarcomeres in striated muscle cells[4][5]. These proteins anchor actin filaments from adjoining sarcomeres and are critical for the structural integrity, elasticity, and mechanical stability of muscle[1][2][4][5][6][7]. Major Z-disc proteins include alpha-actinin, titin (connectin), nebulin/nebulette, filamin C, telethonin (T-Cap), myopalladin, and others, each with specific roles in actin filament crosslinking, mechanotransduction, and signaling[1][3][4][5][6]. Mutations and variants in Z-disc proteins have been strongly linked to inherited cardiomyopathies—collectively termed "Z-discopathies"—and other muscle diseases[4][5]. Rather than being a single drug target, the Z-disc is a complex protein assembly, and individual component proteins (e.g., titin, alpha-actinin) may be considered specific molecular targets or disease genes on their own[1][4][5]. Notes: - "Z-disc proteins" is not a single molecule or well-defined target but denotes a broad class of sarcomeric proteins[4][5]. - There is no canonical abbreviation or single gene/protein that this term points to—it encompasses dozens of related proteins, each with unique gene names and biological functions. - As a target, this entry is too general for drug targeting; individual members (e.g., "Titin", "Alpha-actinin-2") should be mapped instead. - No known drugs or direct targeting mechanisms; no single set of biomarkers or safety concerns, as this is not a unified target. - Thus, the entry is considered "incorrect" in the context of a molecular target database and should be flagged for correction/mapping to individual canonical proteins.

Other names

Z-disk proteinZ-line protein