Fig. 5

Peptidoglycan biosynthesis. a Proteins involved in the peptidoglycan biosynthetic pathway and final crosslinking steps (after [63, 110]). b Peptidoglycan pathway proteins in the Archaeplastida, showing MURE, DDL, MRAY and MURG are present throughout the Viridiplantae. The full PG pathway complement with the exception of PBP occurs in several major plant lineages. The final column indicates the gene for plant peptidoglycan associated streptophyte protein (PPASP) identified herein, a putative assignment based on its exclusive presence in plants with the complete or nearly complete PG-pathway