[Action of sulfochlorantine on cell-free systems of Escherichia coli]

Area of Science:

• Biochemistry
• Molecular Biology
• Microbiology

Background:

• Sulfochlorantine is a bactericide known to contain active chlorine.
• Understanding its mechanism of action is crucial for evaluating its efficacy and safety.

Purpose of the Study:

• To investigate the toxic effects of Sulfochlorantine on key enzyme systems in Escherichia coli.
• To elucidate the impact of Sulfochlorantine on bacterial biosynthesis pathways, including protein, DNA, and aminoacyl-tRNA synthesis.

Main Methods:

• Utilized cell-free systems to assess the effects of Sulfochlorantine on enzyme activities.
• Measured DNA synthesis catalyzed by calf thymus DNA polymerase alpha.
• Assessed aminoacyl-tRNA synthesis catalyzed by aminoacyl-tRNA synthetases and poly(U)-directed polyphenylalanine formation.

Main Results:

• Sulfochlorantine exhibited general toxicity, inactivating multiple Escherichia coli enzyme systems.
• At lethal concentrations (0.01% and higher), it repressed DNA synthesis by 50% and aminoacyl-tRNA synthesis by 70%.
• A sublethal concentration (0.005%) strongly inhibited the ribosomal step of protein biosynthesis, reducing polyphenylalanine formation by 95%.

Conclusions:

• Sulfochlorantine effectively targets and inhibits crucial bacterial biosynthesis processes.
• The bactericide demonstrates a potent inhibitory effect on the ribosomal machinery of protein synthesis.
• These findings highlight Sulfochlorantine's broad antimicrobial action through enzyme system inactivation.