Journal: bioRxiv
Article Title: A DltE–DltD–DltX interaction network regulates lipoteichoic acid D-alanylation in Lactiplantibacillus plantarum and symbiotic drosophila growth promotion
doi: 10.64898/2026.03.19.713020
Figure Lengend Snippet: A, Schematic representation of the Lp Dlt machinery. DltA transfers D-alanine (D-Ala; with a “+” sign) onto the phosphopantetheinyl arm of DltC, which interacts with the MBOAT protein DltB. DltD and DltX are involved in the extracellular steps of the pathway. Their roles are discussed in the paper. DltE removes D-Ala from LTA and may function in coordination with other Dlt components. B, Amount of D-Ala released from whole cells of NC8 (WT) and derivative mutants by alkaline hydrolysis and quantified by HPLC after derivatization with Marfey’s reagent. Each value represents a single analysis made on a independent experiment. The data are expressed in % of D-Ala compared to the average value of WT (100%). C, Larval longitudinal length after inoculation with strains Lp NC8 , Δ dltX , Δ dltD , DltX Δc-term and DltD 6M . Larvae were collected 6 days after association and measured as described in the Methods section. Purple asterisks illustrate statistically significant difference with Lp NC8 larval size; ****: p<0.0001. Center values in the graph represent means and error bars represent 95% CI. Representative graph from one out of three independent experiments. D, Bacterial load of Lp NC8 (n=3), Δ dltX (n=3), Δ dltD (n=3), DltX Δc-term (n=3) and DltD 6M (n=3) strains recovered from larvae associated with 10 8 CFUs after 6 days association. The bars in the graph represent mean and 95% CI. A representative graph from one out of three independent experiments is shown.
Article Snippet: The 5ʹ- and 3ʹ-terminal regions of dltD region were PCR-amplified with Q5 High-Fidelity 2X Master Mix (NEB) from L. plantarum NC8 chromosomal DNA using primers OL013/OL14 and OL17/OL18.
Techniques: Derivatization