Proteins and other biomolecules with nucleophilic groups

Proteins and other biomolecules with nucleophilic groups represent a broad class of biological entities containing electron-rich centers, such as the sulfhydryl group of cysteine, the epsilon-amino group of lysine, and the N7 position of guanine in DNA (Source: NIH/NCBI, 2023). These nucleophilic sites are critical for various biological functions, including enzymatic catalysis and the maintenance of redox homeostasis through molecules like glutathione (Source: PubChem, 2024). In pharmacology, these groups serve as the primary targets for electrophilic drugs, including classical alkylating agents like cyclophosphamide and modern targeted covalent inhibitors like ibrutinib (Source: StatPearls, 2023). By forming irreversible covalent bonds, these drugs can disrupt DNA replication or permanently inactivate specific signaling proteins to treat cancer and autoimmune diseases. However, the ubiquitous nature of nucleophilic groups in the human body presents significant safety challenges, as non-specific binding can lead to genotoxicity, hypersensitivity, and systemic organ damage (Source: FDA, 2022).

Other names

Biological nucleophilesNucleophilic cellular targetsNucleophilic residuesCellular nucleophiles

Drugs interact with these targets via covalent modification, including alkylation, acylation, or Michael addition, leading to the irreversible inhibition of protein function or DNA cross-linking (Source: NIH/NCBI, 2023).