Thermodynamic analysis of the interaction of the antibiotic teicoplanin and its aglycone with cell-wall peptides.
The thermodynamics of the interaction of the glycopeptidic antibiotic teicoplanin and its peptidic moiety with analogues of bacterial cell-wall peptides were studied by means of calorimetric and spectrophotometric techniques. The analysis of the thermodynamic data has allowed us to evaluate the contributions of the different peptide groups to the binding process. The nature of the primary binding forces is also discussed for each interacting group, on the basis of their enthalpic and entropic contribution and in connection with the detailed structural information available for these antibiotics from n.m.r. data. Similar analyses for the case of vancomycin and ristocetin are also reported.
Arriaga
P
P
Instituto de Quimica-Fisica 'Rocasolano', Serrano, Madrid, Spain.
Laynez
J
J
Menendez
M
M
Cañada
J
J
Garcia-Blanco
F
F
D000595:Amino Acid Sequence; D000900:Anti-Bacterial Agents / Q000378:metabolism*; D002151:Calorimetry; D002462:Cell Membrane / Q000378:metabolism; D006020:Glycopeptides / Q000378:metabolism; D008565:Membrane Proteins / Q000378:metabolism; D008969:Molecular Sequence Data; D010455:Peptides / Q000378:metabolism*; D012310:Ristocetin / Q000378:metabolism; D013056:Spectrophotometry, Ultraviolet; D017334:Teicoplanin; D013816:Thermodynamics; D014640:Vancomycin / Q000378:metabolism
D000900:Anti-Bacterial Agents; D006020:Glycopeptides; D008565:Membrane Proteins; D010455:Peptides; D012310:Ristocetin; D017334:Teicoplanin; D014640:Vancomycin