alpha-proteobacteria

Examples of alpha-proteobacteria in the following topics:

• The Evolution of Mitochondria

  • Alpha-proteobacteria are a large group of bacteria that includes species symbiotic with plants, disease organisms that can infect humans via ticks, and many free-living species that use light for energy.
  • Most mitochondria are shaped like alpha-proteobacteria and are surrounded by two membranes, which would result when one membrane-bound organism engulfs another into a vacuole.
  • The mitochondrial inner membrane involves substantial infoldings called cristae that resemble the textured, outer surface of alpha-proteobacteria .
  • Mitochondria have their own circular DNA chromosome that is stabilized by attachments to the inner membrane and carries genes similar to genes expressed by alpha-proteobacteria.
  • Mitochondria that carry out aerobic respiration have their own genomes, with genes similar to those in alpha-proteobacteria.

• Mitochondria

  • The mitochondrial inner membrane is extensive and involves substantial infoldings called cristae that resemble the textured, outer surface of alpha-proteobacteria.
  • Mitochondria have their own (usually) circular DNA chromosome that is stabilized by attachments to the inner membrane and carries genes similar to genes expressed by alpha-proteobacteria.

• The Evolution of Plastids

  • Like mitochondria, plastids appear to have a primary endosymbiotic origin, but differ in that they derive from cyanobacteria rather than alpha-proteobacteria.

• Overview of Proteobacteria

  • The Proteobacteria are a major group (phylum) of bacteria .
  • All proteobacteria are Gram-negative, with an outer membrane mainly composed of lipopolysaccharides.
  • The Proteobacteria are divided into six sections, referred to by the Greek letters alpha through zeta, again based on rRNA sequences.
  • The divisions of the proteobacteria were once regarded as subclasses (e.g. α-subclass of the Proteobacteria), but are now regarded as classes (e.g. the Alphaproteobacteria).
  • Domain: Bacteria, Kingdom: Eubacteria, Phylum: Proteobacteria, Class: Gammaproteobacteria, Order: Enterobacteriales, Family: Enterobacteriaceae, Genus: Escherichia, Species: E. coli.

• The Deltaproteobacteria

  • Deltaproteobacteria is a class of Proteobacteria .
  • All species of this group are, like all Proteobacteria, Gram-negative.
  • Myxobacteria are included among the delta group of proteobacteria, a large taxon of Gram-negative forms.

• Alphaproteobacteria

  • Alphaproteobacteria is a class of Proteobacteria; like all Proteobacteria, they are Gram-negative.
  • Alphaproteobacteria is a class of Proteobacteria.
  • Like all Proteobacteria, they are Gram-negative .

• Morphologically Unusual Proteobacteria

  • The two main groups of morphologically unusual proteobacteria include spirillum and prosthecate bacteria.
  • Two main groups of morphologically unusual proteobacteria include spirillum and prosthecate bacteria.

• Epsilonproteobacteria

  • Epsilonproteobacteria is a class of Proteobacteria.
  • All species of this class are, like all Proteobacteria, Gram-negative .

• Betaproteobacteria

  • Burkholderia is a genus of proteobacteria probably best known for its pathogenic members: Burkholderia mallei, responsible for glanders, a disease that occurs mostly in horses and related animals; Burkholderia pseudomallei, causative agent of melioidosis; and Burkholderia cepacia, an important pathogen of pulmonary infections in people with cystic fibrosis (CF).

• Alpha Decay

  • In alpha decay an atomic nucleus emits an alpha particle and transforms into an atom with smaller mass (by four) and atomic number (by two).
  • Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle that consists of two protons and two neutrons, as shown in .
  • Alpha decay is the most common cluster decay because of the combined extremely high binding energy and relatively small mass of the helium-4 product nucleus (the alpha particle).
  • Alpha decay typically occurs in the heaviest nuclides.
  • Alpha decay is one type of radioactive decay.