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New human species discovered: Mitochondrial genome of previously unknown hominins from Siberia decoded

Date:
March 25, 2010
Source:
Max Planck Institute for Evolutionary Anthropology
Summary:
Researchers have sequenced ancient mitochondrial DNA from a finger bone of a female found in southern Siberia. She comes from a previously unknown human species, which lived for about 48,000 to 30,000 years in the Altai Mountains in Central Asia.

Archaeologists in the Denisova Cave in August 2005 where the tiny piece of finger bone was found.
Credit: Max Planck Institute for Evolutionary Anthropology / Krause

An international team of researchers from the Max Planck Institute for Evolutionary Anthropology in Leipzig has sequenced ancient mitochondrial DNA from a finger bone of a female found in southern Siberia. She comes from a previously unknown human species, which lived about 48,000 to 30,000 years ago in the Altai Mountains in Central Asia.

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The mitochondrial genome that was inherited from the mother and passed on to the descendants is an indication of a new wave of emigration from Africa. It differs from the Homo erectus ancestors of Neanderthals and Homo sapiens, according to a study published in the journal Nature.

The first group of hominins, which left Africa about 1.9 million years ago, was Homo erectus. Archaeological findings and genetic data suggest that at least two other groups subsequently left Africa: First, about 500,000 to 300,000 years ago, the ancestors of Neanderthals. After that, 50,000 years ago, anatomically modern humans. Direct descendants of Homo erectus could have survived until less than 100,000 years ago in Indonesia. Earlier representatives of Homo erectus and Homo heidelbergensis lived in northern latitudes -- for example, more than 125,000 years in the Altai Mountains in southern Siberia. Neanderthals also lived at that time in Siberia.

Johannes Krause, Svante Pääbo and colleagues from the Max Planck Institute for Evolutionary Anthropology in Leipzig have now sequenced mitochondrial DNA from a tiny piece of a finger bone. The bone was found 2008 in the Denisova Cave in the Altai Mountains in southern Siberia. They compared the ancient DNA from the mitochondria, the "power plants of the cell," with the mitochondrial DNA of Neanderthals and living humans. It turned out that the mitochondrial DNA of the hominins from South Siberia differs markedly from that of all previously known hominins.

As shown by a detailed analysis of the mitochondrial genome, these hominins shared a common ancestor with modern humans and Neanderthals about 1.0 million years ago. In addition, the age of the fossil suggests that these unknown people in Southern Siberia lived close in time and space with Neanderthals as well as with modern humans.

Editor's Note: The above information has been adapted from a news release, originally written in German (http://www.mpg.de/bilderBerichteDokumente/dokumentation/pressemitteilungen/2010/pressemitteilung201003232/presselogin/) and translated into English via Google Translate (http://translate.google.com).


Story Source:

The above story is based on materials provided by Max Planck Institute for Evolutionary Anthropology. Note: Materials may be edited for content and length.


Journal References:

  1. Johannes Krause, Qiaomei Fu, Jeffrey M. Good, Bence Viola, Michael V. Shunkov, Anatoli P. Derevianko, Svante Pääbo. The complete mitochondrial DNA genome of an unknown hominin from southern Siberia. Nature, 2010; DOI: 10.1038/nature08976
  2. Terence A. Brown. Human evolution: Stranger from Siberia. Nature, 2010; DOI: 10.1038/nature09006

Cite This Page:

Max Planck Institute for Evolutionary Anthropology. "New human species discovered: Mitochondrial genome of previously unknown hominins from Siberia decoded." ScienceDaily. ScienceDaily, 25 March 2010. <www.sciencedaily.com/releases/2010/03/100325100848.htm>.
Max Planck Institute for Evolutionary Anthropology. (2010, March 25). New human species discovered: Mitochondrial genome of previously unknown hominins from Siberia decoded. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2010/03/100325100848.htm
Max Planck Institute for Evolutionary Anthropology. "New human species discovered: Mitochondrial genome of previously unknown hominins from Siberia decoded." ScienceDaily. www.sciencedaily.com/releases/2010/03/100325100848.htm (accessed October 24, 2014).

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