Deltaproteobacteria

Deltaproteobacteria is a class of Proteobacteria. They are a varied group of bacteria that include a variety of types that do not share many common characteristics apart from their phylogenetic relatedness. They include sulfate-reducing bacteria, many of which are anaerobes, as well as a number of important genera whose members are predatory on other bacteria, such as Bdellovibrio and Myxobacteria.

Classification

The Deltaproteobacteria comprise a branch of the Proteobacteria and consist of several orders, which are:

• Desulfobacterales
• Desulfovibrionales
• Desulfurellales
• Desulfuromonadales
• Myxococcales
• Bdellovibrionales

Characteristics

Deltaproteobacteria are characterized by their ability to reduce sulfate and other similar substances. They are typically found in environments with a lot of organic material, such as sediments or the intestinal tracts of animals. Some members of this class are predatory and can invade other bacteria.

Ecological Role

Deltaproteobacteria play a significant role in the sulfur cycle. They are responsible for the reduction of sulfate to sulfide, a process that is important in the decomposition of organic matter. They also contribute to the cycling of other elements, such as carbon and nitrogen.

Medical Importance

While most Deltaproteobacteria are not pathogenic, some can cause disease in humans and animals. For example, Desulfovibrio species have been associated with inflammatory bowel disease.

See Also

• Proteobacteria
• Bacteria
• Microbiology

Deltaproteobacteria Resources
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