Microcella aerolata sp. nov., isolated from electronic waste-associated bioaerosols

Arch Microbiol. 2022 Aug 2;204(8):538. doi: 10.1007/s00203-022-03094-3.


A Gram-positive, non-motile, non-spore-forming and short rod-shaped actinomycete strain, designated GA224T, was isolated from electronic waste-associated bioaerosols. The optimal growth conditions for this isolate, a facultatively anaerobic bacterium, were 37 °C and pH 8.0. The cell-wall peptidoglycan type was B2γ, with 2,4-diaminobutyric acid (DAB) as the diamino acids, while the major menaquinone was MK-12. The polar lipid profile was composed of diphosphatidylglycerol, phosphatidylglycerol, unidentified phospholipids, unidentified glycolipids and an unidentified lipid. The major cellular fatty acids were anteiso-C15:0 and iso-C16:0. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain GA224T fell within the genus Microcella. The draft genome of strain GA224T comprised 2,495,189 bp with a G + C content of 72.2 mol%. The average nucleotide identity and digital DNA-DNA hybridization values between strain GA224T and the type strain of the type species of Microcella species were lower than 95% and 70%, respectively. Based on the phenotypic, chemotaxonomic and genomic data, strain GA224T represents a novel species, for which the name Microcella aerolata sp. nov. is proposed, with GA224T as the type strain (= GDMCC 1.2165 T = JCM 34462 T).

Keywords: 16S rRNA gene sequence; Bioaerosols; Genomic taxonomy; Microcella aerolata.

MeSH terms

  • Actinomycetales* / genetics
  • Bacterial Typing Techniques
  • Base Composition
  • DNA, Bacterial / genetics
  • Electronic Waste*
  • Fatty Acids / analysis
  • Phospholipids / analysis
  • Phylogeny
  • RNA, Ribosomal, 16S / genetics
  • Sequence Analysis, DNA
  • Vitamin K 2 / chemistry


  • DNA, Bacterial
  • Fatty Acids
  • Phospholipids
  • RNA, Ribosomal, 16S
  • Vitamin K 2