d-PROTEOBACTERIA

Domain    Bacteria

Phylum     Proteobacteria

Class       d-proteobacteria

delta Proteobacteria

A group of proteobacteria represented by morphologically diverse, anaerobic sulfidogens. Some are considered bacterial predators, having bacteriolytic properties

                       BDELLOVIBRIO

Domain   Bacteria
Phylum   Proteobacteria
Class      d-Proteobacteria
Order      Bdellovibrionales
Family    Bdellovibrionaceae
Genus    Bdellovibrio 

bdella 'leach'  G-, obligate aerobic, found in river water or soil,  attacks G- B., reproduces in periplasm, feeds on biopolymers (proteins, nucleic acids) , forms bdelloplast, enters dormant or predatory  stage

                 DESULFOVIBRIONALES 

Domain  Bacteria
Phylum   Proteobacteria
Class     d-Proteobacteria
Order    Desulfovibrionales                

obligate anaerobe uses oxidized S  e.g. sulfates (SO4 (2-) ), elemental S instead  of  O  for  e acceptors, product ==> hydrogen  sulfide (H2S), key part  of sulfur cycle; 4 families, majority are sulfate-reducing,  exception-   Lawsonia and Bilophila 

                        DESULFOVIBRIO

Domain   Bacteria
Phylum   Proteobacteria
Class      d-Proteobacteria
Order     Desulfovibrionales
Family    Desulfovibrionaceae
Genus    Desulfovibrio

G-, sulfate-reducing, uses org compounds lactate/ethanol/fatty acids as e donors reduces S/sulfates ==>H2S,  aqua environ w>L org. material,  anaerobic, limited  growth in O2, found in anaerobic  sediments, intestinal  tracts h/a, capable transduction,  bioremediation potential for  uranium

                       MYXOCOCCALES

Domain     Bacteria
Phylum     Proteobacteria
Class        d-Proteobacteria
Order       Myxococcales
 

myxobacteria "slime bacteria"  soil,   large genomes, G-, most  complex  life  cycle, predatory, fruiting, gliding B., travel in swarms ('wolf packs'), cells kept together by intercellular molecular signals, produce biomed/indust chem., @

                        MYXOCOCCUS

Domain  Bacteria
Phylum  Proteobacteria
Class    d-Proteobacteria
Order   Myxococcales
Family  Myxoccaceae
Genus  Myxococcus

Myxococci "nasal mucous" gliding, leave  slime layer, predatory  other  B., G-, spore-f, chemoorganotrophic, obligate aerobes, elongated rods, rounded/tapered ends,  nonflag., aggregate and form myxospores; M. xanthrus M fulvis

                       E-proteobacteria