8k4r

Publication Abstract from PubMed

Adenylation enzymes activate amino acid substrates to aminoacyl adenylates and generally transfer this moiety onto the thiol group of the phosphopantetheine arm of a carrier protein for the selective incorporation of aminoacyl building blocks in natural product biosynthesis. In contrast to the canonical thioester-forming adenylation enzymes, the amide-forming adenylation enzyme VinM transfers an l-alanyl group onto the amino group of the aminoacyl unit attached to the phosphopantetheine arm of the carrier protein VinL to generate dipeptidyl-VinL in vicenistatin biosynthesis. It is unclear how VinM distinguishes aminoacyl-VinL from VinL for amide bond formation. Herein we describe structural and biochemical analyses of VinM. We determined the crystal structure of VinM in complex with VinL using a designed pantetheine-type cross-linking probe. The VinM-VinL complex structure in combination with site-directed mutagenesis analysis revealed that the interactions with both the phosphopantetheine arm and VinL are critical for the amide-forming activity of VinM.

Structural Basis of Amide-Forming Adenylation Enzyme VinM in Vicenistatin Biosynthesis.,Miyanaga A, Nagata K, Nakajima J, Chisuga T, Kudo F, Eguchi T ACS Chem Biol. 2023 Oct 23. doi: 10.1021/acschembio.3c00517. PMID:37870408^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.