Molecular repertoire of Deinococcus radiodurans after 1 year of
Por um escritor misterioso
Last updated 01 julho 2024
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://media.springernature.com/m685/springer-static/image/art%3A10.1186%2Fs40168-020-00927-5/MediaObjects/40168_2020_927_Fig7_HTML.png)
Background The extraordinarily resistant bacterium Deinococcus radiodurans withstands harsh environmental conditions present in outer space. Deinococcus radiodurans was exposed for 1 year outside the International Space Station within Tanpopo orbital mission to investigate microbial survival and space travel. In addition, a ground-based simulation experiment with conditions, mirroring those from low Earth orbit, was performed. Methods We monitored Deinococcus radiodurans cells during early stage of recovery after low Earth orbit exposure using electron microscopy tools. Furthermore, proteomic, transcriptomic and metabolomic analyses were performed to identify molecular mechanisms responsible for the survival of Deinococcus radiodurans in low Earth orbit. Results D. radiodurans cells exposed to low Earth orbit conditions do not exhibit any morphological damage. However, an accumulation of numerous outer-membrane-associated vesicles was observed. On levels of proteins and transcripts, a multi-faceted response was detected to alleviate cell stress. The UvrABC endonuclease excision repair mechanism was triggered to cope with DNA damage. Defense against reactive oxygen species is mirrored by the increased abundance of catalases and is accompanied by the increased abundance of putrescine, which works as reactive oxygen species scavenging molecule. In addition, several proteins and mRNAs, responsible for regulatory and transporting functions showed increased abundances. The decrease in primary metabolites indicates alternations in the energy status, which is needed to repair damaged molecules. Conclusion Low Earth orbit induced molecular rearrangements trigger multiple components of metabolic stress response and regulatory networks in exposed microbial cells. Presented results show that the non-sporulating bacterium Deinococcus radiodurans survived long-term low Earth orbit exposure if wavelength below 200 nm are not present, which mirrors the UV spectrum of Mars, where CO2 effectively provides a shield below 190 nm. These results should be considered in the context of planetary protection concerns and the development of new sterilization techniques for future space missions. Video Abstract
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://d3i71xaburhd42.cloudfront.net/ed62f0f90e5147e0409caf51e60866a62970ddcb/11-Figure5-1.png)
PDF] Proteometabolomic response of Deinococcus radiodurans exposed to UVC and vacuum conditions: Initial studies prior to the Tanpopo space mission
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://journals.asm.org/cms/10.1128/mmbr.00015-10/asset/0c91fbad-640f-4638-8229-e58088ca33d9/assets/graphic/zmr9990922640012.jpeg)
Oxidative Stress Resistance in Deinococcus radiodurans
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://journals.asm.org/cms/10.1128/spectrum.03474-22/asset/3ee99679-1922-457c-a6dc-32cf4fc54ae2/assets/images/medium/spectrum.03474-22-f004.gif)
Memory Effect on the Survival of Deinococcus radiodurans after Exposure in Near Space
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://www.biorxiv.org/content/biorxiv/early/2021/10/14/2021.10.13.464295/F5.large.jpg)
Conjugation-based genome engineering in Deinococcus radiodurans
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://i1.rgstatic.net/publication/279761937_Physiological_and_molecular_basis_of_extreme_radioresistance_in_Deinococcus_radiodurans/links/5760ee5c08ae2b8d20eb698d/largepreview.png)
PDF) Physiological and molecular basis of extreme radioresistance in Deinococcus radiodurans
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://www.mdpi.com/life/life-12-00023/article_deploy/html/images/life-12-00023-g009-550.jpg)
Life, Free Full-Text
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://journals.asm.org/cms/10.1128/mmbr.00015-10/asset/691e14d7-fa11-4e57-92ab-26e0c275dec4/assets/graphic/zmr9990922640011.jpeg)
Oxidative Stress Resistance in Deinococcus radiodurans
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://ars.els-cdn.com/content/image/1-s2.0-S1535947620306125-gr3.jpg)
Deinococcus radiodurans PprI Switches on DNA Damage Response and Cellular Survival Networks after Radiation Damage - ScienceDirect
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://www.science.org/cms/10.1126/science.286.5444.1571/asset/15166416-f2f8-4445-a1d0-bc3bea4e1d59/assets/graphic/se4698014001.jpeg)
Genome Sequence of the Radioresistant Bacterium Deinococcus radiodurans R1
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://journals.asm.org/cms/10.1128/spectrum.03474-22/asset/4c3197b6-04cc-4e60-8f76-83259bf0ab50/assets/images/medium/spectrum.03474-22-f006.gif)
Memory Effect on the Survival of Deinococcus radiodurans after Exposure in Near Space
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://ars.els-cdn.com/content/image/1-s2.0-S2666555723000175-gr3.jpg)
The radioresistant and survival mechanisms of Deinococcus radiodurans - ScienceDirect
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://www.mdpi.com/life/life-12-00023/article_deploy/html/images/life-12-00023-g001b-550.jpg)
Life, Free Full-Text
![Molecular repertoire of Deinococcus radiodurans after 1 year of](https://cdnsciencepub.com/cms/10.1139/cjm-2023-0059/asset/images/cjm-2023-0059_f4.jpg)
The scientific revolution that unraveled the astonishing DNA repair capacity of the Deinococcaceae: 40 years on
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