Where is D radiodurans found?

It has even been found on the inside walls of nuclear reactors. The Guinness Book of World Records says that Deinococcus radiodurans is the world’s most extremophile bacterium. As its name suggests, this bacterium can deal with radiation. It has even been found on the inside walls of nuclear reactors.

How much radiation can Deinococcus radiodurans survive?

radiodurans is capable of withstanding an acute dose of 5,000 grays (Gy), or 500,000 rad, of ionizing radiation with almost no loss of viability, and an acute dose of 15,000 Gy with 37% viability.

Which is the closest relative of D radiodurans?

These genes contain subunits that are characteristic of archaea genes. Genetics coupled with the extreme lifestyles seen in these bacteria indicate that the members of phyla Thermus-Deinococcus are the closest living relatives of the archeabacteria. This is a phylogenic tree provided by Dr. Michael Daly.

Can Deinococcus radiodurans be killed?

A small number of unrelated prokaryotic and eukaryotic radiation-resistant species, such as the bacterium Deinococcus radiodurans, are unusually resistant to killing following exposure to ionizing radiation and other noxious conditions and environments such as desiccation (1).

Is Deinococcus radiodurans harmful to humans?

IT IS almost supernatural. Deinococcus radiodurans, a nondescript bacterium first isolated in 1956 from a spoiled tin of meat, can survive several thousand times the dose of radiation that would kill humans. radiodurans defies death.

Is Deinococcus radiodurans harmful?

If there’s a superhero of the bacterial world, it’s Deinococcus radiodurans. The bacterium’s name–roughly translated as “strange berry that withstands radiation”–says it all: The bug can survive doses of radiation up to 10,000 Grays (Gy)–a level lethal to other bacteria and indeed most cells in general.

How is Deinococcus radiodurans harmful?

Deinococcus radiodurans, a nondescript bacterium first isolated in 1956 from a spoiled tin of meat, can survive several thousand times the dose of radiation that would kill humans. This has puzzled biologists for years, as no organism could have been exposed to such intense radiation under natural circumstances.

Under what conditions can Deinococcus radiodurans survive?

Listed in the Guinness Book of World Records as “the world’s toughest bacterium,” Deinococcus radiodurans can withstand extreme temperatures and drought conditions, lack of nutrients and a thousand times more radiation than a human being.

What conditions can Deinococcus radiodurans survive?

Is D radiodurans harmful to humans?

How does Deinococcus radiodurans repair single stranded DNA?

Deinococcus radiodurans has a unique quality in which it can repair both single- and double-stranded DNA. When damage is apparent to the cell, it brings the damaged DNA into a compartmental ring-like structure where the DNA is repaired, and then is able to fuse the nucleoids from the outside of the compartment with the damaged DNA.

How long does D.radiodurans take to repair a chromosome break?

It usually repairs breaks in its chromosomes within 12–24 hours by a 2-step process. First, D. radiodurans reconnects some chromosome fragments by a process called single-stranded annealing. In the second step, multiple proteins mend double-strand breaks through homologous recombination.

When was the genome of Deinococcus radiodurans published?

The complete DNA sequence of D. radiodurans was published in 1999 by TIGR. A detailed annotation and analysis of the genome appeared in 2001. The sequenced strain was ATCC BAA-816. Deinococcus radiodurans has a unique quality in which it can repair both single- and double-stranded DNA.

Where did the radioresistance of D.radiodurans originate?

A team of Russian and American scientists proposed that the radioresistance of D. radiodurans had a Martian origin. Evolution of the microorganism could have taken place on the Martian surface until it was delivered to Earth on a meteorite.