3-Hydroxy-4-oxo-1(4H)-pyridinealanine. An antineoplastic alanine-substituted pyridine derivative isolated from Leucena glauca. [PubChem]
Pharmacology
Mimosine inhibits DNA synthesis at the level of elongation of nascent chains by altering deoxyribonucleotide metabolism. It arrests the cell cycle in the late G(1) phase.
Purity: >98% A rare amino acid from plants which reversibly blocks the G1 phase of the cell cycle. Deoxyhypusine hydroxylation inhibitor that subsequently inhibits eukaryote initiation factor 5-A.
Biochem/physiol Actions L-Mimosine is a plant amino acid and potential inhibitor of the cell cycle giving rise to growth arrest in G1-phase. An iron chelator that inhibits DNA replication in mammalian cells. Has been shown to have apoptotic activity in xenotransplanted human pancreatic cancer. L-Mimosine is also used as a hypoxia-mimetic agent to stabilize Hypoxia Inducible Factor 1 (HIF-1). L-Mimosine stabilizes HIF-1 through the inhibition of Prolyl Hydroxylases (PHDs) which target HIF-1 through degradation. The mechanism of inhibition is likely through the chelation of Fe2+ bound to the active site of PHD which is required for enzymatic activity.
An L-alpha-amino acid that is propionic acid substituted by an amino group at position 2 and a 3-hydroxy-4-oxopyridin-1(4H)-yl group at position 3 (the 2S-stereoisomer). It a non-protein plant amino acid isolated from Mimosa pudica.