Kryptonia is a
bacterial phylum with
candidate
A candidate, or nominee, is the prospective recipient of an award or honor, or a person seeking or being considered for some kind of position; for example:
* to be elected to an office — in this case a candidate selection procedure occurs.
* t ...
status. It is a member of the FCB group.
The phylum was first proposed in 2016 following the recovery of genomes from a large-scale effort to mine
metagenomic
Metagenomics is the study of genetic material recovered directly from environmental or clinical samples by a method called sequencing. The broad field may also be referred to as environmental genomics, ecogenomics, community genomics or microb ...
and
single-cell genomic datasets for novel bacterial diversity.
Extensive analysis of 5.2 Tb of metagenomic data from around the world suggests members of Kryptonia are found exclusively in high-temperature pH-netural geothermal springs, such as the Jinze pool (Yunnan Province, China), Dewar Creek Spring (British Columbia, Canada), and Great Boiling Spring (Nevada, USA).
Due to primer mismatches, members of this phylum have been widely under-detected in 16S rRNA sequencing-based surveys of community composition.
Analysis of the first genomes recovered from this group (from four different genera) suggests that members of Kryptonia are heterotrophs with a putative capacity for iron respiration.
They are inferred to be incapable of some producing key metabolic compounds on their own (e.g.: biotin, certain amino acids), and thus may be metabolically dependent on other microbes in their environment, although the nature of such a relationship is unknown.
The name "Kryptonia" is derived from the Greek work "krupton", which means "hidden" or "secret". This is a nod to the phylum having hitherto eluded detection due to SSU rRNA primer biases.
Taxonomy
The currently accepted taxonomy is based on the
List of Prokaryotic names with Standing in Nomenclature
List of Prokaryotic names with Standing in Nomenclature (LPSN) is an online database that maintains information on the naming and taxonomy of prokaryotes, following the taxonomy requirements and rulings of the International Code of Nomenclature ...
(LPSN)
and
National Center for Biotechnology Information
The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The ...
(NCBI).
* Class "Kryptonia"
** Order "Kryptoniales"
*** Family "Kryptoniaceae"
**** Genus "''Ca.''
Chrysopegocella"
Eloe-Fadrosh et al. 2016 corrig. Oren et al. 2020 ''Ca.''_Chrysopegis"_(sic).html" ;"title="Chrysopegis.html" ;"title="''Ca.'' Chrysopegis">''Ca.'' Chrysopegis" (sic)">Chrysopegis.html" ;"title="''Ca.'' Chrysopegis">''Ca.'' Chrysopegis" (sic)***** "''Ca.'' Chrysopegocella kryptomonas"
Eloe-Fadrosh et al. 2016 corrig. Oren et al. 2020
**** Genus "''Ca.'' Kryptobacter"
Eloe-Fadrosh et al. 2016
***** "''Ca.'' Kryptobacter tengchongensis"
Eloe-Fadrosh et al. 2016
**** Genus "''Ca.''
Kryptonium"
Eloe-Fadrosh et al. 2016
***** "''Ca.''
Kryptonium thompsoni"
Eloe-Fadrosh et al. 2016
**** Genus "''Ca.''
Thermokryptus"
Eloe-Fadrosh et al. 2016
***** "''Ca.''
Thermokryptus mobilis"
Eloe-Fadrosh et al. 2016
See also
*
List of bacteria genera This article lists the genera of the bacteria. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI). However many taxonomic names are ...
*
List of bacterial orders
This article lists the orders of the Bacteria. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI)
and the phylogeny is based on 16S ...
References
{{Bacteria classification
Bacteria phyla
Bacteria by classification
Genomics