Download MendeleyCrystal structure of CmnB involved in the biosynthesis of the nonproteinogenic amino acid L-2,3-diaminopropionic acid.
Toh, S.I., Lo, C.L., Chang, C.Y.(2023) Acta Crystallogr F Struct Biol Commun 79: 193-199
- PubMed: 37405487
- DOI: https://doi.org/10.1107/S2053230X23005769
- Primary Citation of Related Structures:
8IF7 - PubMed Abstract:
L-2,3-Diaminopropionic acid (L-Dap) is a nonproteinogenic amino acid that plays as an important role as a building block in the biosynthesis of several natural products, including capreomycin, viomycin, zwittermicin, staphyloferrin and dapdiamide. A previous study reported that CmnB and CmnK are two enzymes that are involved in the formation of L-Dap in the biosynthesis of capreomycin. CmnB catalyzes the condensation reaction of O-phospho-L-serine and L-glutamic acid to generate N-(1-amino-1-carboxyl-2-ethyl)glutamic acid, which subsequently undergoes oxidative hydrolysis via CmnK to generate the product L-Dap. Here, the crystal structure of CmnB in complex with the reaction intermediate PLP-α-aminoacrylate is reported at 2.2 Å resolution. Notably, CmnB is the second known example of a PLP-dependent enzyme that forms a monomeric structure in crystal packing. The crystal structure of CmnB also provides insights into the catalytic mechanism of the enzyme and supports the biosynthetic pathway of L-Dap reported in previous studies.
Organizational Affiliation:
Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
