Cellular proteins and other nucleophilic macromolecules

Cellular proteins and other nucleophilic macromolecules encompass a diverse array of biological polymers, including DNA, RNA, and various proteins, characterized by the presence of electron-rich (nucleophilic) functional groups. These groups, such as the N7 position of guanine in DNA or sulfhydryl groups in cysteine residues, are primary sites for covalent modification by electrophilic drugs and reactive metabolites [StatPearls: Alkylating Agents, 2023]. This broad-spectrum interaction is the fundamental mechanism for several classes of chemotherapy, including alkylating agents and platinum-based compounds, which disrupt cellular replication and function to treat various cancers [NCBI: Alkylating Agents]. However, because these interactions are often non-selective, they lead to significant clinical challenges, including systemic toxicity, mutagenicity, and the risk of secondary cancers [PubMed: Covalent Binding and Toxicity]. Consequently, this term does not refer to a single, discrete therapeutic target but rather a general chemical vulnerability within the cell that is exploited for cytotoxic effect.

Other names

Cellular nucleophilesNucleophilic biological macromoleculesNucleophilic targetsBiological nucleophiles

Covalent modification via alkylation, arylation, or coordination complex formation at nucleophilic functional groups such as thiols, amines, hydroxyls, and phosphates.