Bacterial and fungal DNA and intracellular proteins

Bacterial and fungal DNA and intracellular proteins represent a broad, non-specific set of molecular targets primarily addressed by antiseptic and disinfectant agents. Unlike targeted antibiotics that inhibit specific metabolic pathways, agents hitting these targets—such as chlorhexidine, povidone-iodine, and silver ions—exert their antimicrobial effects through widespread chemical damage to the cell's internal machinery (StatPearls, 2023). This damage includes the coagulation of cytoplasmic proteins and the binding or oxidation of genomic DNA, which effectively halts replication and enzymatic activity (PubMed, 2021). Because these targets are fundamental to all microbial life, these agents possess an exceptionally broad spectrum of activity against Gram-positive bacteria, Gram-negative bacteria, and various fungi (NCBI, 2022). However, the non-discriminatory nature of this mechanism means that these targets are also present in human cells, generally restricting the use of such drugs to topical applications, wound care, and surgical preparation to prevent systemic toxicity.

Other names

Microbial intracellular componentsBacterial and fungal nucleic acids and proteinsProkaryotic and fungal cytoplasmic contents

Drugs targeting these components typically act via non-specific chemical disruption, including the oxidation of functional groups, denaturation of essential enzymes, and the precipitation of cytoplasmic proteins and nucleic acids, which collectively leads to rapid microbial cell death (StatPearls, 2023; NCBI, 2022).