Pyruvyl-transferases involved in peptidoglycan-associated polymer biosynthesis. CsaB in Bacillus anthracis is necessary for the non-covalent anchoring of proteins containing an SLH (S-layer homology) domain to peptidoglycan-associated pyruvylated polysaccharides. WcaK and AmsJ are involved in the biosynthesis of colanic acid in Escherichia coli and of amylovoran in Erwinia amylovora [1].

1: Bacterial SLH domain proteins are non-covalently anchored to the cell surface via a conserved mechanism involving wall polysaccharide pyruvylation. Mesnage S, Fontaine T, Mignot T, Delepierre M, Mock M, Fouet A; EMBO J 2000;19:4473-4484. PMID:10970841

2: Analysis of the Rhizobium meliloti genes exoU, exoV, exoW, exoT, and exoI involved in exopolysaccharide biosynthesis and nodule invasion: exoU and exoW probably encode glucosyltransferases. Becker A, Kleickmann A, Kuster H, Keller M, Arnold W, Puhler A; Mol Plant Microbe Interact. 1993;6:735-744. PMID:8118055