Divalent cation in bacterial biofilm matrix

Divalent cations such as calcium (Ca²⁺), magnesium (Mg²⁺), zinc (Zn²⁺), iron (Fe²⁺), barium (Ba²⁺), and manganese (Mn²⁺) are not proteins, receptors, or enzymes but are inorganic ions that play essential structural roles in the stabilization of bacterial biofilm matrices. They interact electrostatically with negatively charged polymers (notably extracellular DNA and exopolysaccharides) within the biofilm, enhancing its integrity and mechanical stiffness. Removal or chelation of these cations disrupts the matrix and can increase biofilm susceptibility to antimicrobials. Divalent cations are crucial for the cohesion, structure, and resistance properties of biofilms formed by both Gram-positive (e.g., *Streptococcus mutans*) and Gram-negative (e.g., *Pseudomonas aeruginosa*) bacteria. Their effect can be species- and ion-specific. Chelating agents like EDTA may be used experimentally or therapeutically to destabilize biofilms by sequestering matrix-stabilizing cations, but this approach is not highly targeted and carries risks due to the importance of divalent cations in host physiology. "Divalent cations in bacterial biofilm matrix" as written does not correspond to a specific molecular target for therapeutics (such as a receptor, enzyme, or transporter), but rather to a class of ions with a collective structural effect on the microbial biofilm environment. Thus, this query does not represent a canonical drug target suitable for structured therapeutic targeting.

Other names

Divalent ions in biofilmDivalent metal ions in bacterial biofilmMatrix-stabilizing divalent cation

Matrix destabilization by chelation (for agents like EDTA that remove divalent cations), Inhibition of biofilm formation/stability