Bergey's Manual of Systematic Bacteriology

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Classification of bacteria follows this manual.

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Bergey's Manual of Systematic Bacteriology.

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Bergey's Manual classifies bacteria into taxa based on this.

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rRNA sequences.

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The focus of Volume 1 (2001) of Bergey's Manual of Systematic Bacteriology.

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The Archaea and the deeply branching and phototrophic Bacteria.

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The focus of Volume 2 (2005) of Bergey's Manual of Systematic Bacteriology.

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Proteobacteria (3 parts).

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The focus of Volume 3 (2006) of Bergey's Manual of Systematic Bacteriology.

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Low GC Gram-positive bacteria.

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The focus of Volume 4 (2007) of Bergey's Manual of Systematic Bacteriology.

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High GC Gram-positive bacteria.

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The focus of Volume 5 (2007) of Bergey's Manual of Systematic Bacteriology.

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Planctomycetes, Spirochaetes, Fibrobacteres, Bacteroidetes, and Fusobacteria.

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Classification of Prokaryotes

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Prokaryotes are classified into two domains: Bacteria and Archaea. - Domain Bacteria: Characterized by peptidoglycan rRNA signature. - Gram-negative: Includes Proteobacteria and Nonproteobacteria. - Gram-positive: Divided into Low G+C and High G+C groups. - Domain Archaea: Characterized by pseudomurein rRNA signature.

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Proteobacteria includes most Gram-negative chemoheterotrophs.

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Proteobacteria are presumed to have arisen from common photosynthetic ancestors. Few are now photosynthetic. Their phylogenetic relationship is based on rRNA studies. The name "Proteobacteria" is derived from the Greek god Proteus, who could assume many shapes.

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Proteobacteria classification

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Proteobacteria are classified into five groups: α-Proteobacteria, β-Proteobacteria, γ-Proteobacteria, δ-Proteobacteria, and ε-Proteobacteria.