Friedmanniella antarctica gen nov, sp nov, an LL-diaminopimelic acid-containing actinomycete from antarctic sandstone

A gram-positive, aerobic, slowly growing actinomycete was isolated from antarctic sandstone, Packets of spherical cells of this organism form clusters, The diagnostic diamino acid of the peptidoglycan is LL-diaminopimelic acid with glycine in position 1 of the peptide subunit, The major menaquinone is MK-9(H-4), and the main cellular fatty acids are 12- and 13-methyltetradecanoic acids, Only a few organic compounds are metabolized, The DNA base composition is 73 mol% G + C. A 16S ribosomal DNA sequence comparison showed that this isolate is a phylogenetic neighbor of the propionibacteria and related taxa, Its closest relative is Microlunatus phosphovorus, Morphological, physiological, and genotypic characteristics support the description of a nem genus and new species, Friedmanniella antarctica gen. nov., sp, nov. The type strain is strain AA-1042 (= DSM 11053).