Siv G. E. Andersson | |
---|---|
Born | Siv Gun Elisabeth Andersson 1959 (age 64–65) |
Education | Ph.D. |
Alma mater | Uppsala University |
Scientific career | |
Fields | Evolutionary biology |
Institutions | Uppsala University, University of Cambridge |
Doctoral advisor | Charles Kurland |
Website | www |
Siv Gun Elisabeth Andersson (born 1959) is a Swedish evolutionary biologist, professor of molecular evolution at Uppsala University. [1] She is member of both the Royal Swedish Academy of Sciences and of Engineering. [2] [3] She is also Head of basic research at the Knut and Alice Wallenberg Foundation [4] and has been co-director of the Swedish national center for large-scale research Science for Life Laboratory between 2017 and 2021. [5] Her research focuses on the evolution of bacteria, mainly on intracellular parasites.
Andersson grew up in Horndal, Dalarna. Her mother was home care assistant and her father was employed in the wood industry. [6] She studied Biology at Uppsala University, since the programme was the only one that had a course about DNA. She defended her PhD in molecular biology in 1990, under the supervision of Charles Kurland. [7] She applied for a postdoctoral stipend from EMBO to continue her research in the United States, but ended up obtaining a research position at the MRC Laboratory of Molecular Biology in Cambridge. [6] She became professor of molecular evolution in 2000, at the Uppsala University's Evolutionary Biology Center. [6] She was elected at the Royal Swedish Academy of Sciences in 2005. [2]
Andersson has been very active in developing the Swedish national center for large-scale research Science for Life Laboratory, especially its DNA sequencing and bioinformatics platforms. She served as Co-director for the center between 2017 and 2021. [5]
During the 2020 COVID-19 pandemic, she contributed, together with Lars Engstrand and with the financial support of the Knut and Alice Wallenberg Foundation, to establish the first large-scale testing facility in Sweden [8] [9]
Andersson's research first focused around the role of codon usage in shaping bacterial genomes. [10] After her postdoctoral fellowship, she contributed to sequence one of the first genome of an obligate intracellular parasite, Rickettsia prowazekii , the causative agent of epidemic typhus. [11]
In her later career, her research continued to explore bacteria and their relationships with their different hosts. [12] In particular, she is interested in the genomic consequences of long-term associations of intracellular bacteria. [13] She explored the evolution of Bartonella , [14] Wolbachia , [15] and Planctomycetota, [16] among others.
Andersson has published over 200 peer-reviewed articles, and has an h-index of 61, as of 2022. [17]
Svante Pääbo is a Swedish geneticist and Nobel Laureate who specialises in the field of evolutionary genetics. As one of the founders of paleogenetics, he has worked extensively on the Neanderthal genome. In 1997, he became founding director of the Department of Genetics at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany. Since 1999, he has been an honorary professor at Leipzig University; he currently teaches molecular evolutionary biology at the university. He is also an adjunct professor at Okinawa Institute of Science and Technology, Japan.
Rickettsia is a genus of nonmotile, gram-negative, nonspore-forming, highly pleomorphic bacteria that may occur in the forms of cocci, bacilli, or threads. The genus was named after Howard Taylor Ricketts in honor of his pioneering work on tick-borne spotted fever.
Evolutionary biology is the subfield of biology that studies the evolutionary processes that produced the diversity of life on Earth. It is also defined as the study of the history of life forms on Earth. Evolution holds that all species are related and gradually change over generations. In a population, the genetic variations affect the phenotypes of an organism. These changes in the phenotypes will be an advantage to some organisms, which will then be passed on to their offspring. Some examples of evolution in species over many generations are the peppered moth and flightless birds. In the 1930s, the discipline of evolutionary biology emerged through what Julian Huxley called the modern synthesis of understanding, from previously unrelated fields of biological research, such as genetics and ecology, systematics, and paleontology.
The European Society for Evolutionary Biology (ESEB) was founded on 28 August 1987 in Basel (Switzerland), with ~ 450 evolutionary biologists attending the inaugural congress of the Society; Arthur Cain became the Society’s first president. The founding of the ESEB was closely linked to the launching of the Society’s journal, the Journal of Evolutionary Biology, with Stephen C. Stearns as the first Editor in Chief, and the first issue appearing in January 1988. See the editorial opening of the journal; see also Steve Stearns’ account of the early days of the ESEB.
Rickettsia prowazekii is a species of gram-negative, alphaproteobacteria, obligate intracellular parasitic, aerobic bacillus bacteria that is the etiologic agent of epidemic typhus, transmitted in the feces of lice. In North America, the main reservoir for R. prowazekii is the flying squirrel. R. prowazekii is often surrounded by a protein microcapsular layer and slime layer; the natural life cycle of the bacterium generally involves a vertebrate and an invertebrate host, usually an arthropod, typically the human body louse. A form of R. prowazekii that exists in the feces of arthropods remains stably infective for months. R. prowazekii also appears to be the closest semi-free-living relative of mitochondria, based on genome sequencing.
The Rickettsiales, informally called rickettsias, are an order of small Alphaproteobacteria. They are obligate intracellular parasites, and some are notable pathogens, including Rickettsia, which causes a variety of diseases in humans, and Ehrlichia, which causes diseases in livestock. Another genus of well-known Rickettsiales is the Wolbachia, which infect about two-thirds of all arthropods and nearly all filarial nematodes. Genetic studies support the endosymbiotic theory according to which mitochondria and related organelles developed from members of this group.
Rickettsia rickettsii is a Gram-negative, intracellular, cocco-bacillus bacterium that was first discovered in 1902. Having a reduced genome, the bacterium harvests nutrients from its host cell to carry out respiration, making it an organo-heterotroph. Maintenance of its genome is carried out through vertical gene transfer where specialization of the bacterium allows it to shuttle host sugars directly into its TCA cycle.
Genome size is the total amount of DNA contained within one copy of a single complete genome. It is typically measured in terms of mass in picograms or less frequently in daltons, or as the total number of nucleotide base pairs, usually in megabases. One picogram is equal to 978 megabases. In diploid organisms, genome size is often used interchangeably with the term C-value.
Alphaproteobacteria or α-proteobacteria, also called α-Purple bacteria in earlier literature, is a class of bacteria in the phylum Pseudomonadota. The Magnetococcales and Mariprofundales are considered basal or sister to the Alphaproteobacteria. The Alphaproteobacteria are highly diverse and possess few commonalities, but nevertheless share a common ancestor. Like all Proteobacteria, its members are gram-negative, although some of its intracellular parasitic members lack peptidoglycan and are consequently gram variable.
Ehrlichia is a genus of Rickettsiales bacteria that are transmitted to vertebrates by ticks. These bacteria cause the disease ehrlichiosis, which is considered zoonotic, because the main reservoirs for the disease are animals.
Orientia tsutsugamushi is a mite-borne bacterium belonging to the family Rickettsiaceae and is responsible for a disease called scrub typhus in humans. It is a natural and an obligate intracellular parasite of mites belonging to the family Trombiculidae. With a genome of only 2.0–2.7 Mb, it has the most repeated DNA sequences among bacterial genomes sequenced so far. The disease, scrub typhus, occurs when infected mite larvae accidentally bite humans. This infection can prove fatal if prompt doxycycline therapy is not started.
Kerstin Lindblad-Toh is a scientist in comparative genomics, specializing in mammalian genetics. She is the Scientific Director of vertebrate genomics at the Broad Institute and a professor in comparative genomics at Uppsala University. In 2010 she co-founded Science for Life Laboratory (SciLifeLab) together with Mathias Uhlén and acted as Co-Director until 2015. As the leader of the Broad Institute's Mammalian Genome Initiative she has led the effort to sequence and analyze the genomes of various mammals, including mouse, dog, chimpanzee, horse, rabbit and opossum. She has researched extensively on the genetics of dogs, identifying genes and genetic variants important in disease susceptibility, morphology and behavior.
V-type proton ATPase subunit H is an enzyme that in humans is encoded by the ATP6V1H gene.
Rickettsia conorii is a Gram-negative, obligate intracellular bacterium of the genus Rickettsia that causes human disease called boutonneuse fever, Mediterranean spotted fever, Israeli tick typhus, Astrakhan spotted fever, Kenya tick typhus, Indian tick typhus, or other names that designate the locality of occurrence while having distinct clinical features. It is a member of the spotted fever group and the most geographically dispersed species in the group, recognized in most of the regions bordering on the Mediterranean Sea and Black Sea, Israel, Kenya, and other parts of North, Central, and South Africa, and India. The prevailing vector is the brown dog tick, Rhipicephalus sanguineus. The bacterium was isolated by Emile Brumpt in 1932 and named after A. Conor, who in collaboration with A. Bruch, provided the first description of boutonneuse fever in Tunisia in 1910.
Rickettsia typhi is a small, aerobic, obligate intracellular, rod shaped gram negative bacterium. It belongs to the typhus group of the Rickettsia genus, along with R. prowazekii. R. typhi has an uncertain history, as it may have long gone shadowed by epidemic typhus. This bacterium is recognized as a biocontainment level 2/3 organism. R. typhi is a flea-borne disease that is best known to be the causative agent for the disease murine typhus, which is an endemic typhus in humans that is distributed worldwide. As with all rickettsial organisms, R. typhi is a zoonotic agent that causes the disease murine typhus, displaying non-specific mild symptoms of fevers, headaches, pains and rashes. There are two cycles of R. typhi transmission from animal reservoirs containing R. typhi to humans: a classic rat-flea-rat cycle that is most well studied and common, and a secondary periodomestic cycle that could involve cats, dogs, opossums, sheep, and their fleas.
Sarah Amalia Teichmann is a German scientist, the former head of cellular genetics at the Wellcome Sanger Institute and a visiting research group leader at the European Bioinformatics Institute (EMBL-EBI). She serves as director of research in the Cavendish Laboratory, Professor at the University of Cambridge and Cambridge Stem Cell Institute, and is a senior research fellow at Churchill College, Cambridge.
The ATP:ADP Antiporter (AAA) Family is a member of the major facilitator superfamily. Members of the AAA family have been sequenced from bacteria and plants.
Per Johan Sven Elf, is a Swedish biophysicist. He is professor of physical biology at Uppsala universitet and Wallenberg Scholar.
Maria Falkenberg is a professor of medical biochemistry at the Sahlgrenska Academy of the University of Gothenburg, Sweden. She has made important contributions to understanding how the mitochondrial genome is maintained in health and disease.
Reductive evolution is the process by which microorganisms remove genes from their genome. It can occur when bacteria found in a free-living state enter a restrictive state or are completely absorbed by another organism becoming intracellular (symbiogenesis). The bacteria will adapt to survive and thrive in the restrictive state by altering and reducing its genome to get rid of the newly redundant pathways that are provided by the host. In an endosymbiont or symbiogenesis relationship where both the guest and host benefit, the host can also undergo reductive evolution to eliminate pathways that are more efficiently provided for by the guest.