In enzymology, a fluorothreonine transaldolase (EC 2.2.1.8) is an enzyme that catalyzes the chemical reaction

L-threonine + fluoroacetaldehyde ${\displaystyle \rightleftharpoons }$ acetaldehyde + 4-fluoro-L-threonine

Thus, the two substrates of this enzyme are L-threonine and fluoroacetaldehyde, whereas its two products are acetaldehyde and 4-fluoro-L-threonine.

This enzyme belongs to the family of transferases, specifically those transferring aldehyde or ketonic groups (transaldolases and transketolases, respectively). The systematic name of this enzyme class is fluoroacetaldehyde:L-threonine aldehydetransferase.

• Murphy CD, O'Hagan D, Schaffrath C (2001). "Identification of a PLP-Dependent Threonine Transaldolase: A Novel Enzyme Involved in 4-Fluorothreonine Biosynthesis in Streptomyces cattleya This work was supported by the Biotechnological and Biological Sciences Research Council and the University of St Andrews". Angew. Chem. Int. Ed. Engl. 40 (23): 4479–4481. doi:10.1002/1521-3773(20011203)40:23<4479::AID-ANIE4479>3.0.CO;2-1. PMID 12404452.
• Murphy CD, Schaffrath C, O'Hagan D (2003). "Fluorinated natural products: the biosynthesis of fluoroacetate and 4-fluorothreonine in Streptomyces cattleya". Chemosphere. 52 (2): 455–61. doi:10.1016/S0045-6535(03)00191-7. PMID 12738270.