Related Experiment Video

Updated: Aug 29, 2026

Optimization and Utilization of Agrobacterium-mediated Transient Protein Production in Nicotiana
23:21

Optimization and Utilization of Agrobacterium-mediated Transient Protein Production in Nicotiana

Published on: April 19, 2014

[Production of pesticins on synthetic nutrient media]

L I Gramotina, Iu G Suchkov, G N Rozanova

    Antibiotiki
    |August 1, 1982
    PubMed

    Insights

    Most plague microbe cultures produce pesticin I. Spheroplasts showed higher pesticin titers than rod-shaped forms, especially on complete nutrient media, indicating enhanced bacteriocin production in altered cell forms.

    Area of Science:

    • Microbiology
    • Bacteriology
    • Molecular Biology

    Background:

    • Plague microbe (Yersinia pestis) produces bacteriocins like pesticins.
    • Bacteriocin production can be influenced by growth media and cell morphology.
    • Understanding pesticin production is crucial for studying plague pathogenesis and control.

    Purpose of the Study:

    • To investigate pesticin I and III production by plague microbe cultures.
    • To compare pesticin production in rod-shaped forms versus spheroplasts.
    • To evaluate the impact of different nutrient media on bacteriocin synthesis.

    Main Methods:

    • Culturing plague microbes on synthetic and complete nutrient media.
    • Assessing pesticin production using inhibition zone assays.
    • Quantifying bacteriocin titers in different growth conditions and cell forms.

    Main Results:

    • 96.2% of cultures produced pesticin I on both synthetic and complete media.
    • Pesticin III was not detected in spheroplasts on synthetic media but was present on complete media.
    • Spheroplasts exhibited significantly higher average pesticin titers (640-1280) compared to rod-shaped forms (320).

    Conclusions:

    • Plague microbes readily produce pesticin I across various conditions.
    • Nutrient media composition affects pesticin III detection in spheroplasts.
    • Plague microbe spheroplasts demonstrate enhanced pesticin production capacity compared to their rod-shaped counterparts.

    More Related Videos

    Split Green Fluorescent Protein System to Visualize Effectors Delivered from Bacteria During Infection07:25

    Split Green Fluorescent Protein System to Visualize Effectors Delivered from Bacteria During Infection

    Published on: May 24, 2018

    Preparing Protein Producing Synthetic Cells using Cell Free Bacterial Extracts, Liposomes and Emulsion Transfer09:37

    Preparing Protein Producing Synthetic Cells using Cell Free Bacterial Extracts, Liposomes and Emulsion Transfer

    Published on: April 27, 2020

    Related Concept Videos

    Production of Antibiotics01:27

    Production of Antibiotics

    Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
    Production of Pharmaceuticals01:30

    Production of Pharmaceuticals

    Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...
    Production of Biopesticides01:18

    Production of Biopesticides

    Biopesticides offer a sustainable alternative to chemical pesticides, utilizing microbial agents to control agricultural pests. Bacillus thuringiensis (Bt) is a widely employed bacterium known for its potent insecticidal activity. Bt biopesticides are favored for their specificity to insect pests, minimal environmental impact, and natural degradability.Mechanism of Bt Toxin Action Bt produces insecticidal crystal (Cry) proteins during its sporulation phase. These proteins form parasporal...