Distinctive electrophoretic patterns of Esterases from Levinea malonatica, Levinea amalonatica and Citrobacter

Area of Science:

• Microbiology
• Biochemistry
• Enzymology

Background:

• Levinea and Citrobacter are related genera of Enterobacteriaceae.
• Accurate identification of bacterial species is crucial for clinical and epidemiological studies.
• Esterases are enzymes that catalyze the hydrolysis of ester bonds and can exhibit species-specific variations.

Purpose of the Study:

• To analyze and compare the esterase profiles of Levinea malonatica, Levinea amalonatica, and Citrobacter species.
• To establish distinctive esterase zymogram patterns for each species.
• To investigate the variability and molecular sizes of esterase bands within and between these bacterial groups.

Main Methods:

• Horizontal slab electrophoresis in polyacrylamide-agarose gel was used to analyze esterases.
• Synthetic substrates were employed to detect esterase activity.
• Disc electrophoresis with varying acrylamide concentrations determined the relative molecular sizes of esterase bands.

Main Results:

• Distinct esterase zymogram patterns were identified for L. malonatica, L. amalonatica, and Citrobacter.
• L. malonatica exhibited two major esterase bands with specific substrate hydrolysis profiles.
• L. amalonatica showed one prominent band, while Citrobacter displayed a major band with slight mobility differences compared to L. amalonatica. Citrobacter strains showed considerable electrophoretic mobility variations, whereas L. amalonatica was less variable.
• The major esterase band of Citrobacter was found to be smaller than that of L. amalonatica.

Conclusions:

• Esterase zymograms provide a reliable method for differentiating between Levinea and Citrobacter species.
• The established esterase patterns can aid in the rapid and accurate identification of these bacteria.
• Enzyme electrophoresis offers valuable insights into the biochemical diversity within closely related bacterial taxa.