Plesiomonas shigelloides: Difference between revisions
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Interesting features of cell structure; how it gains energy; what important molecules it produces. | Interesting features of cell structure; how it gains energy; what important molecules it produces. | ||
It is a short gram-negative rod. It is oxidase-positive and catalase-positive. The organism moves by polar flagella which are lophotrichous, meaning they have multiple flagella in the same area. Because of this, the bacteria can only move in one direction. (Adams and Moss) | |||
==Ecology and Pathogenesis== | ==Ecology and Pathogenesis== | ||
Revision as of 00:36, 22 April 2010
Classification
Bacteria; Proteobacteria; Gamma Proteobacteria; Enterobacteriales; Enterobacteriaceae
Species
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NCBI: Taxonomy |
Plesiomonas shigelloides
Description and Significance
Describe the appearance, habitat, etc. of the organism, and why you think it is important.
Plesiomonas shigelloides is a facultatively anaerobic chemo-organotrophic Gram-negative bacterium. Being that this organism is faculatively anaerobic means that it can use oxygen as a terminal electron acceptor when it is present, but also flawlessly switches to fermentation as a means of producing ATP when oxygen is absent. One study has shown that like many organisms, Plesiomonas shigelloides utilizes glucose as a source of carbon as well as energy source. However, what is somewhat odd, is that these particular organisms have a membrane bound mannose permease. It is unknown as to why this organism has the ability to take in mannose, but lacks the ability to use it constructively as a carbon or energy source. The lack of mannose isomerase (coverts mannose to its 2 epimer glucose) causes a build up of mannose 6-phosphate and subsequent death.
Genome Structure
Describe the size and content of the genome. How many chromosomes? Circular or linear? Other interesting features? What is known about its sequence?
Cell Structure, Metabolism and Life Cycle
Interesting features of cell structure; how it gains energy; what important molecules it produces.
It is a short gram-negative rod. It is oxidase-positive and catalase-positive. The organism moves by polar flagella which are lophotrichous, meaning they have multiple flagella in the same area. Because of this, the bacteria can only move in one direction. (Adams and Moss)
Ecology and Pathogenesis
Habitat; symbiosis; biogeochemical significance; contributions to environment.
If relevant, how does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.
References
Author
Page authored by _____, student of Prof. Jay Lennon at Michigan State University.
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