Table 1 Peptidoglycan structural variations in selected LAB and genes involved in PG synthesis or modification.
From: Cell wall structure and function in lactic acid bacteria
Peptidoglycan | L. lactis MG1363 | L. casei BL23 | L. rhamnosus GG | L. plantarum WCFS1 |
|---|---|---|---|---|
Cross-linking type | L-Lys-D-Asp | L-Lys-D-Asp | L-Lys-D-Asp | mDAP direct |
Cross-linking index | 35.5 % | 34% | 36.5 % | 37.5% |
   aslA gene | + | + | + | - |
   racD gene | + | + | + | + |
Fifth residue stem peptide | D-Ala | D-Lac | D-Lac | D-Lac |
Acetylation of MurNAc | 3.2 % | 30 % | 37 % | 39 % |
   oatA gene | + | + | + | + |
Acetylation of GlcNAc | no | no | no | 9 % |
   oatB gene | - | - | - | + |
N-deacetylation of GlcNAc | 9 % | no | no | no |
   pgdA gene | + | + | + | - |
Amidation of D-Glu | 100 % | 100 % | 100 % | 100 % |
   murT/gatD genes | + | + | + | + |
Amidation of D-Asp | 75% | 100 % | 100 % | No D-Asp |
   asnH gene | + | + | + | - |
Amidation of mDAP | No mDAP | No mDAP | No mDAP | 100% |
   asnB1 gene | - | - | - | + |