Nucleic acid homologies among oxidase-negative Moraxella species.
The deoxyribonucleic acid (DNA) base composition and DNA homologies of more than 40 strains of oxidase-negative Moraxella species were determined. These bacteria have also been identified as belonging to the Mima-Herellea-Acinetobacter group and the Bacterium anitratum group, as well as to several other genera including Achromobacter and Alcaligenes. The DNA base content of these strains ranged from 40 to 46% guanine plus cytosine. DNA-DNA competition experiments distinguished five groups whose members were determined by showing 50% or more homology to one of the reference strains: B. anitratum type B5W, Achromobacter haemolyticus var. haemolyticus, Alcaligenes haemolysans, Achromobacter metalcaligenes, and Moraxella lwoffi. A sixth group comprised those strains showing less than 50% homology to any of the reference strains. Negligible homology was found between strains of oxidase-negative and oxidase-positive Moraxella species in DNA-DNA competition experiments. However, evidence of a distant relationship between the two groups was obtained in competition experiments by using ribosomal ribonucleic acid.
D001419:Bacteria / Q000201:enzymology; D003596:Cytosine / Q000032:analysis; D004269:DNA, Bacterial / Q000032:analysis* / Q000302:isolation & purification / Q000378:metabolism; D005827:Genetics, Microbial; D006147:Guanine / Q000032:analysis; D006824:Hybridization, Genetic; D009016:Moraxella / Q000032:analysis* / Q000201:enzymology; D010088:Oxidoreductases; D010641:Phenotype; D012329:RNA, Bacterial / Q000302:isolation & purification / Q000378:metabolism
D004269:DNA, Bacterial; D012329:RNA, Bacterial; D006147:Guanine; D003596:Cytosine; D010088:Oxidoreductases