Metaplanococcus

Metaplanococcus is a genus of Gram-Positive or Gram-variable, cocci or short rod-shaped bacteria in the family Caryophanaceae from the order Caryophanales.[1] The type species of this genus is Metaplanococcus flavidus.[2]

Metaplanococcus
Scientific classification
Domain:
Bacteria
Phylum:
Bacillota
Class:
Bacilli
Order:
Caryophanales
Family:
Caryophanaceae
Genus:
Metaplanococcus Gupta and Patel 2020
Species
  • M. flavidus

based on LPSN 2021

Members of Metaplanococcus are previously species belonging to Planococcus. Instead of branching with species from Planococcus, this species and an unnamed Planomicrobium species formed a monophyletic branch in various phylogenetic trees constructed based on conserved genome sequences, indicating their phylogenetic relatedness.[1] The family Caryophanaceae encompassed many branching anomalies such as this one, partially due to the reliance on 16S rRNA sequences as a method for classification, which is known to have low resolution power and give differing results depending on the algorithm used.[3] In 2020, a comparative genomic study emended the family, resulting in the establishment of three new genera, including Metaplanococcus.[1]

The name Metaplanococcus is derived from the Greek adjective meta, translating into "besides" and the Latin term Planococcus, referring the genus name. Together, Metaplanococcus can be translated as a genus besides Planococcus.[1]

Biochemical Characteristics and Molecular Signatures[1]

Members of this genus motile by means of a single polar flagellum.

17 conserved signature indels (CSIs) were identified through genomic analyses as uniquely present in this genus in the following proteins: ABC transporter substrate-binding protein, methionine–tRNA ligase, MetQ/NlpA family ABC transporter substrate-binding protein, ABC transporter permease, spore protease YyaC, N-acetyl-alpha-D-glucosaminyl-5′L-malate synthase BshA, orotidine-5-phosphate decarboxylase, and phospho-N-acetylmuramoyl-pentapeptide-transferase.[1] These CSIs provide a reliable molecular means for distinguishing members of Metaplanococcus from other genera in the family Caryophanaceae and all other bacteria.

Taxonomy

Metaplanococcus, as of 2021, contains one species with a validly published name.[2] This genus was identified as a monophyletic clade and phylogenetically unrelated to other species in the family Caryophanaceae in studies examining the taxonomic relationships within the family.[1]

References
  1. Gupta, Radhey S.; Patel, Sudip (2020-01-14). "Robust Demarcation of the Family Caryophanaceae (Planococcaceae) and Its Different Genera Including Three Novel Genera Based on Phylogenomics and Highly Specific Molecular Signatures". Frontiers in Microbiology. 10: 2821. doi:10.3389/fmicb.2019.02821. ISSN 1664-302X. PMC 6971209. PMID 32010063.
  2. "Genus: Metaplanococcus". lpsn.dsmz.de. Retrieved 2021-06-05.
  3. Ludwig, Wolfgang; Schleifer, Karl‐Heinz; Whitman, William B. (2015-09-14). "Planococcaceae". Bergey's Manual of Systematics of Archaea and Bacteria: 1. doi:10.1002/9781118960608.fbm00116. ISBN 9781118960608.
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