Sucrose-secreting Cyanobacteria
Sucrose-secreting Cyanobacteria - Related Videos
07:04
Determination of the Glycogen Content in Cyanobacteria
0 Views •
Cited by 26 •
2017
Here, we present a reliable and easy assay to measure the glycogen content in cyanobacterial cells. The procedure entails precipitation, selectable depolymerization, and the detection of glucose residues. This method is suitable for both wildtype and genetically engineered strains and can facilitate the metabolic engineering of cyanobacteria.
11:00
Liquid Phase Reactor: Sucrose Inversion
0 Views •
2023
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Both batch and continuous flow reactors are used in catalytic reactions. Packed beds, which use solid catalysts and a continuous flow, are the most common configuration. In the absence of an extensive recycle stream, such packed bed reactors are typically modeled as "plug flow". The other most common continuous reactor is a stirred tank, which is assumed to be perfectly...
05:44
Assembly and Quantification of Co-Cultures Combining Heterotrophic Yeast with Phototrophic Sugar-Secreting Cyanobacteria
0 Views •
2024
This protocol provides a comprehensive guideline for the setup and quantitative monitoring of co-cultures, including photoautotrophic sugar-secreting cyanobacteria and heterotrophic yeasts.
04:14
Generation of Antibiotic-Marked Mutants in Cyanobacteria via Homologous Recombination
0 Views •
2025
Source: Lea-Smith, D. J., et al. Generation of Marked and Markerless Mutants in Model Cyanobacterial Species. J. Vis. Exp. (2016)The video demonstrates a method for generating antibiotic-marked mutants in cyanobacteria. The protocol begins with culturing cyanobacteria, followed by centrifugation and washing steps that preserve surface pili. A plasmid carrying an antibiotic resistance gene flanked by homologous sequences is then introduced. During incubation, the plasmid is internalized via pili...
03:36
Purification of Bacteriophages Using a Sucrose Density Gradient
0 Views •
2026
Source: Rustad, M., et.al. Synthesis of Infectious Bacteriophages in an E. coli-based Cell-free Expression System. J. Vis. Exp. (2017)This video demonstrates the purification of bacteriophages from a suspension containing host bacterial debris using a sucrose density gradient. It shows how the density gradient separates phages by buoyant density, enabling recovery of a visible band for resuspension and further analysis.
FAQs
The key control point is how photosynthetically fixed carbon is partitioned inside the cell. Engineering can redirect a portion of carbon dioxide-derived products toward sucrose synthesis rather than leaving carbon in other cellular pools. This allocation determines how effectively the strain functions as a photosynthetic production platform and supports efforts to increase sucrose output without losing focus on carbon utilization.
Sucrose transport systems connect intracellular synthesis with extracellular product accumulation. Genetic modification can introduce or regulate transport components that move sucrose out of the cyanobacterial cell, making secretion efficiency a distinct engineering target rather than treating synthesis alone as the endpoint. Improving this step can increase the amount recovered from the surrounding medium and support simpler downstream processing.
Genetic regulation allows researchers to modify both sucrose production and its export from the cell. These changes can adjust how much fixed carbon enters the sucrose pathway and how efficiently the product leaves the biomass. Studying those controls helps identify designs that improve secretion efficiency and carbon use, which are central goals in developing cyanobacteria as biological production systems.
A study can compare engineered strains under controlled cultivation conditions, focusing on sucrose production and the amount released into the surrounding medium. The workflow links genetic design with measurable extracellular product accumulation, allowing researchers to assess carbon utilization and secretion efficiency together. This approach distinguishes strains that synthesize sucrose from those that also export it effectively.
When sucrose accumulates outside the cells, recovery can be separated from harvesting the cyanobacterial biomass. That feature may simplify downstream processing because the desired soluble carbon product is present in the surrounding medium rather than confined entirely within the cells. For bioengineering studies, extracellular accumulation therefore provides a practical outcome for evaluating secretion performance and production-platform design.
These engineered strains support broader research on photosynthetic cell factories, carbon utilization, and biological production using light and carbon dioxide. Their study provides a platform for examining how genetic changes affect product synthesis, transport, and release under controlled cultivation. In bioengineering, that combination is relevant to designing renewable systems for soluble carbon products and improving secretion-based production strategies.