# Thermaceae

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**Thermaceae** is a [family](/source/Family_(taxonomy)) of bacteria belonging to the [phylum](/source/Phylum) [Deinococcota](/source/Deinococcota). It is the only family in the [order](/source/Order_(biology)) **Thermales**.[1] They are particularly resistant to heat, and live in the [benthic zone](/source/Benthic_zone) of the Gulf of Mexico.[2]

Members of the order *Thermales* can be distinguished from all other bacteria through molecular signatures consisting of [conserved signature indels](/source/Conserved_signature_indels) (CSIs) and conserved signature proteins (CSPs) that are exclusively present in members of this order. Specifically, six CSIs were identified in the following proteins: [DNA topoisomerase I](/source/DNA_topoisomerase), ABC transporter permease, citrate synthase, [phosphoribosylformylglycinamidine synthase](/source/Phosphoribosylformylglycinamidine_synthase), pyruvate dehydrogenase and alpha-glucan phosphorylase.[3] 51 CSPs were also found to be exclusively shared by members of this order.[3]

In addition, a 76-aminoacid CSI is present in the protein [SecA](/source/SecA) preprotein translocase which is specific to all members of the order *Thermales* as well as *Hydrogenibacillus schlegelii* (also an thermophilic species).[4] Based on studies on other CSIs and CSPs, it is likely that some of these CSIs and CSPs could have implications in the thermophilic phenotype of *Thermales* species.[4]

## Phylogeny

The currently accepted taxonomy is based on the [List of Prokaryotic names with Standing in Nomenclature](/source/List_of_Prokaryotic_names_with_Standing_in_Nomenclature) (LPSN)[5] and [National Center for Biotechnology Information](/source/National_Center_for_Biotechnology_Information) (NCBI).[6]

16S rRNA based LTP_10_2024[7][8][9] 120 marker proteins based GTDB 10-RS226[10][11][12] style="vertical-align:top|

## References

1. Fred A. Rainey & Milton S. da Costa (14 September 2015). "*Thermales* ord. nov.". *Bergey's Manual of Systematics of Archaea and Bacteria*. [doi:10.1002/9781118960608.obm00045](https://doi.org/10.1002/9781118960608.obm00045). ISBN 9781118960608.

1. John W. Tunnell, Jr.; Darryl L. Felder; Sylvia A. Earle; David K. Camp (eds.) (2009). [*Gulf of Mexico Origin, Waters, and Biota: Biodiversity*](https://books.google.com/books?id=CphA8hiwaFIC&q=%22thermales%22+bacteria&pg=PA38). [Texas A&M University Press](/source/Texas_A%26M_University_Press). p. 38. ISBN 9781603442695. Retrieved 18 December 2016.

1. Ho, Jonathan; Adeolu, Mobolaji; Khadka, Bijendra; Gupta, Radhey S. (October 2016). ["Identification of distinctive molecular traits that are characteristic of the phylum "Deinococcus-Thermus" and distinguish its main constituent groups"](http://dx.doi.org/10.1016/j.syapm.2016.07.003). *Systematic and Applied Microbiology*. **39** (7): 453–463. [doi:10.1016/j.syapm.2016.07.003](https://doi.org/10.1016/j.syapm.2016.07.003). [ISSN 0723-2020](https://www.worldcat.org/issn/0723-2020). [PMID 27506333](https://pubmed.ncbi.nlm.nih.gov/27506333)

1. Khadka, Bijendra; Persaud, Dhillon; Gupta, Radhey S. (2019-12-29). "Novel Sequence Feature of SecA Translocase Protein Unique to the Thermophilic Bacteria: Bioinformatics Analyses to Investigate Their Potential Roles". *Microorganisms*. **8** (1): 59. [doi:10.3390/microorganisms8010059](https://doi.org/10.3390/microorganisms8010059). [ISSN 2076-2607](https://www.worldcat.org/issn/2076-2607). [PMC 7023208](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7023208). [PMID 31905784](https://pubmed.ncbi.nlm.nih.gov/31905784)

1. Schoch CL. ["Thermaceae"](https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?command=show&mode=tree&id=188786&lvl=3). [National Center for Biotechnology Information](/source/National_Center_for_Biotechnology_Information) (NCBI) taxonomy database. Retrieved 2025-06-05.

1. ["The LTP"](https://imedea.uib-csic.es/mmg/ltp/#LTP). Retrieved 10 December 2024.

1. ["LTP_all tree in newick format"](https://imedea.uib-csic.es/mmg/ltp/wp-content/uploads/ltp/LTP_all_10_2024.ntree). Retrieved 10 December 2024.

1. ["LTP_10_2024 Release Notes"](https://imedea.uib-csic.es/mmg/ltp/wp-content/uploads/ltp/LTP_10_2024_release_notes.pdf). Retrieved 10 December 2024.

1. ["GTDB release 10-RS226"](https://gtdb.ecogenomic.org/about#4%7C). *[Genome Taxonomy Database](/source/Genome_Taxonomy_Database)*. Retrieved 1 May 2025.

1. ["bac120_r226.sp_label"](https://data.gtdb.ecogenomic.org/releases/release226/226.0/auxillary_files/bac120_r226.sp_labels.tree). *[Genome Taxonomy Database](/source/Genome_Taxonomy_Database)*. Retrieved 1 May 2025.

1. ["Taxon History"](https://gtdb.ecogenomic.org/taxon_history/). *[Genome Taxonomy Database](/source/Genome_Taxonomy_Database)*. Retrieved 1 May 2025.

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Adapted from the Wikipedia article [Thermaceae](https://en.wikipedia.org/wiki/Thermaceae) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Thermaceae?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.