Timonacic is a cyclic sulfur amino acid derivative with potential antineoplastic and antioxidant activities. Timonacic may induce malignant cells to revert back to an untransformed state. It may also restore contact inhibition, a phenomenon characterized by the paracrine inhibition of mitosis following the formation of a critical cell mass, presumably the result of cell-to-cell signal transfer. Timonacic may also produce antioxidant effects secondary to its release of cysteine and restoration of glutathione concentrations.
CAT No: 10-101-123
CAS No:444-27-9
Synonyms/Alias:NSC-25855; DL-Thiazolidine-4-carboxylic acid; Thiaproline; 4-Thiazolidinecarboxylic acid; Thioproline; ATC; Norgamen
Timonacic is a synthetic sulfur-containing amino acid derivative, structurally characterized as the thiazolidine-4-carboxylic acid formed by the condensation of cysteine and formaldehyde. As a non-proteinogenic amino acid, it possesses a unique thiazolidine ring, imparting distinct biochemical properties that have made it a subject of interest in various fields of biochemical and life science research. Its role as a precursor and analog in sulfur amino acid metabolism, as well as its chemical reactivity, underpins its functional significance in experimental systems. Timonacic's stability and reactivity profile enable its use in diverse applications ranging from metabolic pathway studies to analytical chemistry and synthetic biology.
Metabolic pathway research: Timonacic is frequently employed as a model compound to investigate the metabolism of sulfur-containing amino acids, particularly in relation to cysteine and methionine biochemistry. Its structural similarity to cysteine allows researchers to probe enzymatic transformations and metabolic fluxes involving thiazolidine derivatives, providing insights into the regulation of sulfur metabolism and the fate of exogenous or modified amino acid analogs in biological systems. Such studies are valuable for elucidating the biochemical pathways that govern cellular redox balance and sulfur assimilation.
Analytical chemistry: The compound serves as a useful standard and reference material in the qualitative and quantitative analysis of thiazolidine derivatives in biological and chemical samples. Its well-defined structure and characteristic chromatographic and spectroscopic signatures make it an ideal tool for method development in high-performance liquid chromatography (HPLC), mass spectrometry, and nuclear magnetic resonance (NMR) applications. Analytical laboratories leverage its properties to validate detection methods, calibrate instrumentation, and study the behavior of related compounds under various analytical conditions.
Protein modification studies: Due to its thiazolidine ring, Timonacic is used to model post-translational modifications and chemical derivatizations of cysteine residues in proteins. Researchers utilize it to mimic the formation of thiazolidine adducts that occur when cysteine reacts with aldehydes, a process relevant in protein chemistry and the study of oxidative stress or aldehyde toxicity. Investigations employing this compound help delineate the structural consequences and biochemical implications of such modifications, informing both fundamental research and applied protein engineering.
Precursor for synthetic chemistry: In organic synthesis, Timonacic functions as a versatile building block for the preparation of more complex thiazolidine derivatives and related heterocyclic compounds. Its reactivity enables chemists to access a variety of sulfur- and nitrogen-containing scaffolds, which are valuable in the development of new ligands, catalysts, and molecular probes. The compound's compatibility with established synthetic methodologies allows for its incorporation into multi-step reaction sequences, facilitating the exploration of novel chemical space.
Cell culture and redox biology: The compound has been utilized in experimental cell culture systems to study the effects of sulfur-containing amino acid analogs on cellular redox homeostasis and metabolic adaptation. Its introduction into culture media provides a controlled means to modulate intracellular thiol pools, investigate detoxification pathways, and assess the impact of thiazolidine derivatives on cell viability and function. Such applications are particularly relevant in the context of oxidative stress research, metabolic engineering, and the study of adaptive responses to environmental or chemical challenges.
Two sensitive voltammetric techniques (adsorptive and catalytic cathodic stripping) are described for the determination of timonacic, in the presence of copper or nickel ions, respectively. The measured peaks which correspond to the reduction or copper (I) or nickel-timonacic complexes are measured at -773 and -782 mV, respectively. The different experimental parameters have been carefully studied. The methods have been fully validated. The detection limits were 1.5 and 13.6 ng mL-1, respectively. The methods have been applied for the determination of timonacic in pharmaceutical tablets. The obtained results have been compared statistically with those obtained from a published method.
Amin, O. A. R., Belal, S. F., & Bakry, R. (2011). Adsorptive and Catalytic Cathodic Stripping Voltammetric Determination of Timonacic. Portugaliae Electrochimica Acta, 29(2), 115-125.
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