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Lipoteichoic acids (LTAs) have been shown to act as bacterial counterparts to the receptor binding proteins of LL-H, LL-H host range mutant LL-H-a21, and JCL1032. Here we have used LTAs purified by hydrophobic interaction chromatography from different phage-resistant and -sensitive strains of Lactobacillus delbrueckii subsp. lactis. Nuclear magnetic resonance analyses revealed variation in the degree of alpha-glucosyl and D-alanyl substitution of the 1,3-linked poly(glycerophosphate) LTAs between the phage-sensitive and phage-resistant strains. Inactivation of phages was less effective if there was a high level of D-alanine residues in the LTA backbones. Prior incubation of the LTAs with alpha-glucose-specific lectin inhibited the LL-H phage inactivation. The overall level of decoration or the specific spatial combination of alpha-glucosyl-substituted, D-alanyl-substituted, and nonsubstituted glycerol residues may also affect phage adsorption.

journal of bacteriology

Molecular Interaction between Lipoteichoic Acids and <i>Lactobacillus delbrueckii</i> Phages Depends on <scp>d</scp> -Alanyl and α-Glucose Substitution of Poly(Glycerophosphate) Backbones

Molecular Interaction between Lipoteichoic Acids and Lactobacillus delbrueckii Phages Depends on d -Alanyl and α-Glucose Substitution of Poly(Glycerophosphate) Backbones