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STSV-1
Sulfolobus tengchongensis spindle-shaped virus 1 (STSV1) is a DNA virus of the family ''Bicaudaviridae''. It infects the hyperthermophilic archaeon ''Sulfolobus tengchongensis'' which can be found in the volcanic area of Tengchong, Baoshan City, in western Yunnan province, People's Republic of China. In 2014, Sulfolobus tengchongensis spindle-shaped virus 2 (STSV2), a relative of STSV1, also infecting ''S. tengchongensis'', has been reported. Besides ''S. tengchongensis'', STSV2 infects ''Sulfolobus islandicus'' REY15A. It has been demonstrated that STSV2 induces unprecedented gigantism of ''S. islandicus'' cells by blocking the expression of the cell division genes and arresting the cell cycle in the S phase. The diameter of infected cells increases up to 20 times, resulting in 8,000-fold increase in volume compared to noninfected cells. References External links * UCSC Sulfolobus virus STSV1 Genome Browser GatewaySTSV-1, also STSV-2, and Sulfolobus spindle-shaped virus 1, 4, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeon
Archaea ( ; singular archaeon ) is a domain of single-celled organisms. These microorganisms lack cell nuclei and are therefore prokaryotes. Archaea were initially classified as bacteria, receiving the name archaebacteria (in the Archaebacteria kingdom), but this term has fallen out of use. Archaeal cells have unique properties separating them from the other two domains, Bacteria and Eukaryota. Archaea are further divided into multiple recognized phyla. Classification is difficult because most have not been isolated in a laboratory and have been detected only by their gene sequences in environmental samples. Archaea and bacteria are generally similar in size and shape, although a few archaea have very different shapes, such as the flat, square cells of ''Haloquadratum walsbyi''. Despite this morphological similarity to bacteria, archaea possess genes and several metabolic pathways that are more closely related to those of eukaryotes, notably for the enzymes involved in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfolobus
''Sulfolobus'' is a genus of microorganism in the family Sulfolobaceae. It belongs to the archaea domain. ''Sulfolobus'' species grow in volcanic springs with optimal growth occurring at pH 2-3 and temperatures of 75-80 °C, making them acidophiles and thermophiles respectively. ''Sulfolobus'' cells are irregularly shaped and flagellar. Species of ''Sulfolobus'' are generally named after the location from which they were first isolated, e.g. ''Sulfolobus solfataricus'' was first isolated in the Solfatara volcano. Other species can be found throughout the world in areas of volcanic or geothermal activity, such as geological formations called mud pots, which are also known as ''solfatare'' (plural of solfatara). ''Sulfolobus'' as a model to study the molecular mechanisms of DNA replication When the first Archaeal genome, '' Methanococcus jannaschii'', had been sequenced completely in 1996, it was found that the genes in the genome of ''Methanococcus jannaschii'' involv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bicaudaviridae
''Bicaudaviridae'' is a family of hyperthermophilic archaeal viruses. Members of the genus ''Acidianus'' serve as natural hosts. There is only one genus (''Bicaudavirus'') and one species in this family: ''Acidianus two-tailed virus''. However, Sulfolobus tengchongensis spindle-shaped viruses 1 and 2 ( STSV1 and STSV2) are regarded to belong to this family also. Taxonomy The genus contains one genus, which contains one species: * ''Bicaudavirus'' ** ''Acidianus two-tailed virus'' Structure Viruses in ''Bicaudaviridae'' are non-enveloped, with lemon-shaped geometries. Genomes are circular dsDNA molecules of around 48–76 kb in length. High-resolution structure was determined by cryo-EM for Sulfolobus monocaudavirus 1 (SMV1) and a lower-resolution structure was determined for Acidianus two-tailed virus (ATV). Virions of both viruses have helical symmetry, with continuous 7-start helices, composed of the single major capsid protein, forming both the tails and the spindle-shaped b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DNA Virus
A DNA virus is a virus that has a genome made of deoxyribonucleic acid (DNA) that is replicated by a DNA polymerase. They can be divided between those that have two strands of DNA in their genome, called double-stranded DNA (dsDNA) viruses, and those that have one strand of DNA in their genome, called single-stranded DNA (ssDNA) viruses. dsDNA viruses primarily belong to two realms: ''Duplodnaviria'' and ''Varidnaviria'', and ssDNA viruses are almost exclusively assigned to the realm ''Monodnaviria'', which also includes some dsDNA viruses. Additionally, many DNA viruses are unassigned to higher taxa. Reverse transcribing viruses, which have a DNA genome that is replicated through an RNA intermediate by a reverse transcriptase, are classified into the kingdom '' Pararnavirae'' in the realm '' Riboviria''. DNA viruses are ubiquitous worldwide, especially in marine environments where they form an important part of marine ecosystems, and infect both prokaryotes and eukaryotes. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyperthermophilic
A hyperthermophile is an organism that thrives in extremely hot environments—from 60 °C (140 °F) upwards. An optimal temperature for the existence of hyperthermophiles is often above 80 °C (176 °F). Hyperthermophiles are often within the domain Archaea, although some bacteria are also able to tolerate extreme temperatures. Some of these bacteria are able to live at temperatures greater than 100 °C, deep in the ocean where high pressures increase the boiling point of water. Many hyperthermophiles are also able to withstand other environmental extremes, such as high acidity or high radiation levels. Hyperthermophiles are a subset of extremophiles. Their existence may support the possibility of extraterrestrial life, showing that life can thrive in environmental extremes. History Hyperthermophiles isolated from hot springs in Yellowstone National Park were first reported by Thomas D. Brock in 1965. Since then, more than 70 species have been established. The most extreme hyper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tengchong
Tengchong () is a county-level city of Baoshan City, western Yunnan province, People's Republic of China. It is well known for its volcanic activity. The city is named after the town of Tengchong which serves as its political center, previously known as Tengyue () in Chinese. English language sources of the late nineteenth and early twentieth centuries use names such as Teng-Chung, Tingyueh, Teng Yueh, Momein and Momien. It borders with Myanmar in the northwest for . By road, it is west of the provincial capital, Kunming, and westward from Baoshan's urban area. Tengchong marks the southwestern terminus of the Heihe–Tengchong Line, an imaginary line significant in geography that divides the area of China into two roughly equal parts. History Early history Tengchong is one of the earliest developed regions in Southwest China. During the Western Han dynasty (206 BC – AD 24), it belonged to Yizhou Commandery. In the Sui (581–618) and Tang (618–907) dynasties, a contemporar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baoshan City
(; historically also Yongchang, Burmese:ပေါက်ရှန်) is a prefecture-level city in Western Yunnan Province, People's Republic of China. Baoshan is the second-biggest metropolitan area in western Yunnan after Dali. Geography and climate Baoshan is located between the border of Burma and the Lancang river (Mekong); specifically it borders the Burmese states of Kachin to the northwest and Shan to the south. The Nujiang (Salween River) flows through the entire length of the prefecture, north to south. Tempered by the low latitude and moderate elevation, Baoshan has a mild subtropical highland climate (Köppen ''Cwb''), with short, mild, dry winters and warm, rainy summers. Frost may occur in winter but the days still generally warm up to around , with a January average of . The warmest month is June, which averages . Nearly three quarters of the annual rainfall occurs from June to October. Demography The prefecture has about 2.5 million inhabitants. Administ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yunnan
Yunnan , () is a landlocked Provinces of China, province in Southwest China, the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is Kunming. The province borders the Chinese provinces of Guizhou, Sichuan, autonomous regions of Guangxi, and Tibet Autonomous Region, Tibet as well as Southeast Asian countries: Vietnam, Laos, and Myanmar. Yunnan is China's fourth least developed province based on disposable income per capita in 2014. Yunnan is situated in a mountainous area, with high elevations in the northwest and low elevations in the southeast. Most of the population lives in the eastern part of the province. In the west, the altitude can vary from the mountain peaks to river valleys by as much as . Yunnan is rich in natural resources and has the largest diversity of plant life in China. Of the approximately 30,000 species of Vascular plant, higher plants in China, Yu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People's Republic Of China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alphafusellovirus
''Alphafusellovirus'' is a genus of viruses, in the family ''Fuselloviridae ''Fuselloviridae'' is a family of viruses. Sulfolobus species, specifically shibatae, solfataricus, and islandicus, serve as natural hosts. There are two genera and nine species in the family. The ''Fuselloviridae'' are ubiquitous in high-tempe ...''. Species in the genus Sulfolobus (sulfolobus shibatae, Sulfolobus solfataricus, and Sulfolobus islandicus) serve as natural hosts. There are seven species in this genus. Taxonomy The genus contains the following species: * '' Sulfolobus spindle-shaped virus 1'' (SSV1) * '' Sulfolobus spindle-shaped virus 2'' (SSV2) * '' Sulfolobus spindle-shaped virus 4'' (SSV4) * '' Sulfolobus spindle-shaped virus 5'' (SSV5) * '' Sulfolobus spindle-shaped virus 7'' (SSV7) * '' Sulfolobus spindle-shaped virus 8'' (SSV8) * '' Sulfolobus spindle-shaped virus 9'' (SSV9) Structure Viruses in ''Alphafusellovirus'' are enveloped, with lemon-shaped geometries. The diameter is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fuselloviridae
''Fuselloviridae'' is a family of viruses. Sulfolobus species, specifically shibatae, solfataricus, and islandicus, serve as natural hosts. There are two genera and nine species in the family. The ''Fuselloviridae'' are ubiquitous in high-temperature (≥70 °C), acidic (pH ≤4) hot spring A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma (molten rock) or by c ...s around the world. Taxonomy The family contains the following genera and species: * '' Alphafusellovirus'' ** '' Sulfolobus spindle-shaped virus 1'' ** '' Sulfolobus spindle-shaped virus 2'' ** '' Sulfolobus spindle-shaped virus 4'' ** '' Sulfolobus spindle-shaped virus 5'' ** '' Sulfolobus spindle-shaped virus 7'' ** '' Sulfolobus spindle-shaped virus 8'' ** '' Sulfolobus spindle-shaped virus 9'' * '' Betafusellovirus'' ** '' Acidianus s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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