Factors influencing the adsorption of bacteriophage 2 to cells of Pseudomonas aeruginosa.
Phage 2 adsorbed to Pseudomonas aeruginosa strain BI in 5 mM Tris buffer, providing that cations like Na(+), Mg(2+), or Ca(2+) were present. Adsorption was observed over a broad pH range, reaching a maximum level around pH 7.5, which coincided with the pH required for maximal activity of the phage 2-associated slime polysaccharide depolymerase. Mutants of strain BI and other strains of P. aeruginosa possessing slime layers that were devoid of phage 2 depolymerase substrate were incapable of adsorbing phage 2. On the other hand, those strains containing substrate for the phage 2 depolymerase in the slime layer were capable of adsorbing phage 2. The same relationship of phage depolymerase-substrate interaction to phage adsorption was observed with Pseudomonas phage 8, which possesses a depolymerase that differs in its specificity from the phage 2 depolymerase. The receptor-like activity of purified slime containing the specific substrate for the phage-associated depolymerase was demonstrable by its ability to inactivate phage. However, receptor-like activity or phage inactivation was not observed with those slimes that were devoid of the depolymerase substrate.
D000327:Adsorption; D001435:Bacteriophages / Q000201:enzymology; D002118:Calcium / Q000494:pharmacology; D006026:Glycoside Hydrolases / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D008274:Magnesium / Q000494:pharmacology; D009154:Mutation; D011135:Polysaccharides, Bacterial; D011550:Pseudomonas aeruginosa; D012964:Sodium / Q000494:pharmacology
D011135:Polysaccharides, Bacterial; D012964:Sodium; D006026:Glycoside Hydrolases; D008274:Magnesium; D002118:Calcium