|WikiProject Microbiology||(Rated B-class, Mid-importance)|
- 1 Heat resistance
- 2 Martian origins?
- 3 Removed statement
- 4 DNA repair in other species
- 5 Info on bacterium?
- 6 Transliteration of the name
- 7 Viability for amount of grays? Not for amount of gray per day?
- 8 "consuming" heavy metals
- 9 Evolution
- 10 Laboratory simulation of interplanetary ultraviolet radiation
Where's the evidence that it is resistant to heat? I've read that it is resistant to cold but not to heat.
- I see no evidence that it is, nor is there anything in reference no. 6 that indicates this. The sentence by the below poster is not found in that article. We use heat to kill it. Other species of Deinococcus *are* thermophilic but not this one. —Preceding unsigned comment added by 184.108.40.206 (talk) 22:12, 27 February 2008 (UTC)
- I have removed "heat" from the first line. Please source your evidence if you revert. —Preceding unsigned comment added by 220.127.116.11 (talk) 22:19, 27 February 2008 (UTC)
The link in reference no. 5 is incorrect.
- I think that you meant the PMID in reference no. 6, which I have just fixed. The organism is resistant to all forms of stress, including dessication and heat. Reference no. 1 has information on this. I had to fix the PMID for that reference as well. --Ben Best 00:23, 15 October 2006 (UTC)
I'll have to contact someone to find the links to relevant research but IIRC the heat resistance of D. radiodurans was evidenced by its reaction to dessication. They were able to heat it to a high degree evaporating most of the liquid (dessication) and when it was re-introduced to fluids it re-hydrated with very little/no genetic disruption. This is not true of most single cell structures. For example blood has to be kept fluid (and cold) and cannot be stored in a powdered form.—Preceding unsigned comment added by JMBattista (talk • contribs) 05:22, 27 March 2007 (UTC)
Should there be any mention about potentially Martian origins? There's a BBC article about that here: http://news.bbc.co.uk/2/hi/science/nature/6191197.stm
I have removed the statement: " Certain scientists are trying to implement genes into D. radiodurans that will cause its protein to disable metals with which they come into contact. In doing so, this bacterium may be able to metabolize heavy metals such as plutonium, uranium, and other radioactive metals into harmless matter. [dubious ]" This cannot be correct. Radioactive materials do not lose their radioactivity through chemical processes.
- Actually what happens is the radioactive metal is reduced or is caused to form a compound. The resulting product, while still radioactive, becomes insoluble and easier to sequester. So it's true that the metals are metabolized, but false that they become harmless. Ask google about nuclear bioremediation for some links.Viracocha (talk) 22:18, 25 March 2008 (UTC)
DNA repair in other species
I've removed this statement:
I don't know of anyone who suggests that possibility, and the referenced article certainly doesn't. The special repair mechanism would require multiple copies of each chromosome to be stacked on top of each other, which I can't imagine would be feasible in eukaryotes due to the more complicated chromosome structure. But feel free to add it back if you find a better reference.Viracocha (talk) 22:18, 25 March 2008 (UTC)
Info on bacterium?
And, what -does- kill it? high enough heat to decompose the organic molecules has to at some point, but anything short of holding it in a flame? —Preceding unsigned comment added by 18.104.22.168 (talk) 05:06, 9 February 2008 (UTC)
Transliteration of the name
Previous version: 'terrifying berry that withstands radiation'
The Greek deinos can mean terrifying or marvellous, as in deinos legein (marvellous in speaking) but marvellous is more likely for the bacterium, we marvel at it's resistance rather than being scared of it.
- Please read talk page. δεινός doesn't exclusively mean terrifying.
- See here for translations of deinos which include "awesome" and here for the Greek adjective "terrible". Aksel89 (talk) 06:40, 27 April 2009 (UTC)
Viability for amount of grays? Not for amount of gray per day?
D. radiodurans is capable of withstanding an instantaneous dose of up to 5,000 Gy with no loss of viability
Point of improvement: Does viability not mean that it can survive under constant irradiation? So shouldn't the unit be how much gray per time unit? (Also, viability does not get me a link to an article) 22.214.171.124 (talk) 22:42, 4 February 2009 (UTC)
"consuming" heavy metals
- Deinococcus has been genetically engineered for use in bioremediation to consume and digest solvents and heavy metals, even in a highly radioactive site.
An article about a bacterial species can never be complete without a description or an account of its evolution. How does DR's genome contribute to its survival and how did it evolve? Wayne Hardman (talk) 01:25, 28 December 2009 (UTC)
Laboratory simulation of interplanetary ultraviolet radiation
- Zahradka K, Slade D, Bailone A, Sommer S, Averbeck D, Petranovic M, Lindner AB, Radman M (2006). "Reassembly of shattered chromosomes in Deinococcus radiodurans". Nature 443 (7111): 569–573. PMID 17006450.