Cellular proteins and other macromolecules

Cellular proteins and other macromolecules is a broad, non-specific classification encompassing the primary organic components of a cell, including proteins, nucleic acids, lipids, and polysaccharides (Lodish et al., 2000) [1]. In the context of pharmacology and toxicology, this term is often used to describe the collective site of action for non-selective agents that lack a single, discrete molecular target. For example, cytotoxic alkylating agents like nitrogen mustards function by forming covalent bonds with various cellular macromolecules, leading to DNA damage and protein dysfunction (Colvin, 2003) [2]. Because this category includes virtually all functional units within a biological system, it does not meet the criteria for a specific therapeutic target in modern drug discovery. Identifying specific targets is essential for achieving high potency and minimizing off-target toxicity, which is a significant challenge for drugs that interact broadly with cellular components (Zheng et al., 2006) [3]. Consequently, this term is typically considered incorrect or too broad for precise drug-target annotation. It serves more as a descriptive category for systemic or non-specific interactions rather than an actionable target for drug development.

Other names

Cellular macromoleculesBiological macromoleculesIntracellular componentsCellular targets

Non-specific covalent or non-covalent binding to various cellular components, leading to structural damage or functional inhibition (Colvin, 2003) [2].