title: Variability of peptidoglycan structural parameters in gram-negative bacteria.
abstract: Muropeptide composition of peptidoglycan from the Gram-negative bacteria Aeromonas sp., Acinetobacter acetoaceticus, Agrobacterium tumefaciens, Enterobacter cloacae, Proteus morganii, Pseudomonas aeruginosa, Pseudomonas putida, Vibrio parahaemolyticus Yersinia enterocolitica and Escherichia coli, was analyzed by HPLC. In all instances peptidoglycan was built up from the same subunits. A wide disparity in the relative abundance of muropeptides and all structural parameters was observed. The contribution of LD-A2pm-A2pm cross-linked muropeptides was extremely variable; from 1 to 45% of cross-linked muropeptides. Muropeptides with the dipeptides Lys-Lys or Arg-Lys, indicative of murein-bound (lipo)proteins, were detected in all instances although abundance was very variable.
authors.affiliation: Centro de Biología Molecular Severo Ochoa, C.S.I.C., -U.A.M., Facultad de Ciencias (Biología), U.A.M., Madrid, Spain.
authors.forename: J C
authors.initials: JC
authors.lastname: Quintela
authors.forename: M
authors.initials: M
authors.lastname: Caparrós
authors.forename: M A
authors.initials: MA
authors.lastname: de Pedro
mesh_terms: D000595:Amino Acid Sequence; D002240:Carbohydrate Sequence; D002851:Chromatography, High Pressure Liquid; D004151:Dipeptides / Q000032:analysis / Q000737:chemistry; D006090:Gram-Negative Bacteria / Q000737:chemistry*; D046911:Macromolecular Substances; D008969:Molecular Sequence Data; D009842:Oligopeptides / Q000737:chemistry / Q000302:isolation & purification; D010457:Peptidoglycan / Q000737:chemistry* / Q000302:isolation & purification; D013045:Species Specificity
chemical_list: D004151:Dipeptides; D046911:Macromolecular Substances; D009842:Oligopeptides; D010457:Peptidoglycan