Photo: Bobby Yip / Reuters
Scientists at the University of Iowa has discovered a new family of giant viruses Marseilleviridae that contain the same genes, and eukaryotic organisms. About it reported in a press release on the website Phys.org.
Researchers believe that infectious agents contributed to the emergence in the cells of the histones — proteins which participate in packing of DNA and regulate the activity of genes. It protected the vital genetic information, giving rise to multicellular creatures, including people.
Prokaryotes do not have histones of the core proteins, referred to as Н2А, Н2В, N3 and N4. These compounds are found in eukaryotic cells and are involved in the formation of nucleosome particles, around which is twisted DNA. However, viruses histones formed dimers proteins that consisted of two simpler molecules. Scientists believe that Marseilleviridae can be a source of genes which encode the histones, for many other organisms.
Researchers believe that most likely may be the following scenario. The virus has infected protoeukaryote organisms, we exchanged genetic material, and received from him histone genes. Subsequently Marseilleviridae infect other cells, spreading among them the previously borrowed DNA.
Video, photo All from Russia.