Alpha Proteobacteria Flashcards by Chloe Carr

Q

Purple non-sulfur bacteria

A

anoxygenic
mud, dams, oceans
probiotics in fish-feed
carotenoids

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Q

Rickettsia

A

rod, coccus, pleomorphic
Gram-negative
no flagella
small

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Q

Intracellular parasites

A

blood and endothelial cells
spread by parasites

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Q

Reproduction

A

phagocytosis
binary fission
host cells burst

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Q

Digestion

A

oxidizes glutamate and intermediary compounds from host’s tricarboxylic acid cycle

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Q

pro

Typhoid fever

A

Rickettsia prowazekii
Rickettsia typhi

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Q

Rocky Mountain spotted fever

A

Rickettsia rickettsii

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Q

Rhizobiaceae

A

Rhizobium
poly-beta-hydroxy-butyrate
symbiosis with legume root nodules
fix nitrogen

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Q

Agrobacterium

A

related to Rhizobium
not beneficial with plants

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Q

Nitrifying bacteria

A

chemolithoautotrophs
CO2 as carbon source

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Q

Beta-Proteobacteria

A

Nitrosomonas
Nitrosococcus
Nitrosospira
oxidise ammonium to nitrite

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Q

Alpha-Proteobacteria

A

Nitrobacter
Nitrococcus
oxidise nitrite to nitrate

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Q

Nitrosomonas and Nitrobacter

A

Nitrification (NH4 + → NO2 - → NO3 -)
in same soil

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Q

Cytomembranes

A

nitrification takes place

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Q

Ammonia Monooxygenase

A

convert ammonia to hydroxyamine

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Q

Hydroxylamine Oxidoreductase

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A

catalyse production of nitrite

Q

Nitrite Oxidoreductase

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A

catalyse oxidation of nitrite to nitrate

Q

Nitrosomonas europaea

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A

beta-proteobacteria
ammonia-oxidising
rod
binary fission
not motile
cytomembrane: peripheral, lamellar
50.6-51.4 G+C
soil, sewage, freshwater, marine

Q

Nitrobacter winogradskyi

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A

alpha-proteobacteria
nitrite-oxidising
rod, pear-shaped
budding
1 polar flagellum
cytomembranes: polar cap of flattened vesicles
61.7 G+C
soil, freshwater, marine