Nformylglycine

Nformylglycine, also known as N-formylglycine or N^α-formylglycine, is a modified amino acid in which the α‑amine group of glycine is replaced by a formylated amide group. It has the molecular formula C3H5NO3 and a molecular weight of 97.05 g·mol−1. The chemical structure includes a formyl group attached to the nitrogen of the glycine residue, giving it a distinctive reactivity compared to conventional amino acids.

This residue is primarily found in the active sites of formylglycine-generating enzymes (FGEs) and is essential for the maturation of sulfatases. In many organisms, a cysteine or serine residue in sulfatases is post‑translationally oxidized to formylglycine by FGEs, a modification that creates a highly reactive aldehyde capable of binding the essential Fe2+ or Mn2+ cofactor and facilitating sulfation catalysis. The process involves oxidation of the thiol or hydroxyl side chain and subsequent formylation, converting the residue into the formylglycine motif that is critical for sulfatase activity.

Nformylglycine can also be prepared synthetically via direct formylation of glycine using reagents such as formyl chloride or diazomethane, followed by purification by chromatography. In synthetic chemistry, it serves as a useful building block for the construction of peptides bearing a reactive aldehyde group, enabling site‑specific cross‑linking or attachment to probes.

Because of its role in sulfatase activation, Nformylglycine is of interest in enzymology, metabolic engineering, and drug design. Inhibitors that mimic the formylglycine reaction intermediate have been explored as potential therapeutics against diseases involving dysregulated sulfation pathways.

---