Occurrence of Poly-γ-D-Glutamic Acid and Poly-α-L-Glutamine in the Genera Xanthobacter, Flexithrix, Sporosarcina and Planococcus

Syst Appl Microbiol. 1983;4(1):34-41. doi: 10.1016/S0723-2020(83)80032-0.


Unusually high contents of glutamic acid in cell wall preparations of various bacteria were found to originate from glutamyl polymers associated with cell walls. Determination of the configuration of glutamyl residues, isolation and identification of a dipeptide from a partial acid hydrolysate and the result of hydrazinolysis showed that strains of Xanthobacter and Flexithrix contain an α-L-glutaminyl polymer, whereas strains of Sporosarcina halophila and Planococcus halophilus form a γ-D-glutamyl polymer.