New giant virus discovered
PARIS, France (AFP)—Scientists in France have isolated a new giant virus that lurks inside amoeba and whose gene pool includes genetic material from other species.
The virus “is a completely new viral form,” said Didier Raoult, head of infectious and emerging tropical disease research at Aix-Marseille 2 University in France.
Amoeba, single-cell life forms that can be parasites on either human or animals, are acting as “a sort of cradle of creation for new viruses and bacteria,” Raoult said, whose research was also published this week by the Proceedings of National Academy of Sciences.
The genome of the so-called Marseillevirus encompasses a complex repertoire of genes that are “very different from the DNA of other virus forms,” and shows that there is genetic exchange between other micro-organisms such a giant viruses and bacteria found in amoeba, he told AFP in an interview.
With a genome of 368,000 basic pairs, Marseillevirus is the fifth biggest virus ever sequenced and has a diameter of 250 nanometers (around 250 millionth of a millimeter, according to a report by Raoult’s for the French National Centre for Scientific Research (CNRS).
The DNA of the giant virus contains material from different sources including plant and animal matter, bacteria, and other giant viruses such as the Mimivirus, the report said.
He said the mechanism was not foreseen by Charles Darwin’s theory that life comes from a common ancestor.
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