Paracoccus marcusii sp. nov., an orange Gram-negative coccus

Mark Harker, Joseph Hirschberg*, Aharon Oren

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

83 Scopus citations


Phenotypic, chemotaxonomic and 16S rDNA sequence analysis of an orange Gram-negative coccus that appeared as a contaminant on a nutrient agar plate delineated a new species of the genus Paracoccus. Phenotypic features of the strain that differ from all or most of the previously described Paracoccus species include its bright orange colour, caused by the synthesis of large amounts of carotenoids (mainly astaxanthin), and its inability to use nitrate as an electron acceptor in respiration. The name Paracoccus marcusii is proposed for this organism. The type strain is DSM 11574(T).

Original languageAmerican English
Pages (from-to)543-548
Number of pages6
JournalInternational Journal of Systematic Bacteriology
Issue number2
StatePublished - Apr 1998


  • 16S rDNA analysis carotenoids (astaxanthin)
  • Chemotaxonomic analysis
  • Paracoccus marcusii sp. nov.
  • Phenotypic analysis


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