Related Research Articles
Carl Richard Woese was an American microbiologist and biophysicist. Woese is famous for defining the Archaea in 1977 through a pioneering phylogenetic taxonomy of 16S ribosomal RNA, a technique that has revolutionized microbiology. He also originated the RNA world hypothesis in 1967, although not by that name. Woese held the Stanley O. Ikenberry Chair and was professor of microbiology at the University of Illinois Urbana–Champaign.
A flagellum is a hairlike appendage that protrudes from certain plant and animal sperm cells, from fungal spores (zoospores), and from a wide range of microorganisms to provide motility. Many protists with flagella are known as flagellates.
The cytoskeleton is a complex, dynamic network of interlinking protein filaments present in the cytoplasm of all cells, including those of bacteria and archaea. In eukaryotes, it extends from the cell nucleus to the cell membrane and is composed of similar proteins in the various organisms. It is composed of three main components: microfilaments, intermediate filaments, and microtubules, and these are all capable of rapid growth or disassembly depending on the cell's requirements.
FtsZ is a protein encoded by the ftsZ gene that assembles into a ring at the future site of bacterial cell division. FtsZ is a prokaryotic homologue of the eukaryotic protein tubulin. The initials FtsZ mean "Filamenting temperature-sensitive mutant Z." The hypothesis was that cell division mutants of E. coli would grow as filaments due to the inability of the daughter cells to separate from one another. FtsZ is found in almost all bacteria, many archaea, all chloroplasts and some mitochondria, where it is essential for cell division. FtsZ assembles the cytoskeletal scaffold of the Z ring that, along with additional proteins, constricts to divide the cell in two.
Tubulin in molecular biology can refer either to the tubulin protein superfamily of globular proteins, or one of the member proteins of that superfamily. α- and β-tubulins polymerize into microtubules, a major component of the eukaryotic cytoskeleton. Microtubules function in many essential cellular processes, including mitosis. Tubulin-binding drugs kill cancerous cells by inhibiting microtubule dynamics, which are required for DNA segregation and therefore cell division.
Caulobacter crescentus is a Gram-negative, oligotrophic bacterium widely distributed in fresh water lakes and streams. The taxon is more properly known as Caulobacter vibrioides.
Charles Yanofsky was an American geneticist on the faculty of Stanford University who contributed to the establishment of the one gene-one enzyme hypothesis and discovered attenuation, a riboswitch mechanism in which messenger RNA changes shape in response to a small molecule and thus alters its binding ability for the regulatory region of a gene or operon.
Crescentin is a protein which is a bacterial relative of the intermediate filaments found in eukaryotic cells. Just as tubulins and actins, the other major cytoskeletal proteins, have prokaryotic homologs in, respectively, the FtsZ and MreB proteins, intermediate filaments are linked to the crescentin protein. Some of its homologs are erroneously labelled Chromosome segregation protein ParA. This protein family is found in Caulobacter and Methylobacterium.
Bacteria are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep biosphere of Earth's crust. Bacteria play a vital role in many stages of the nutrient cycle by recycling nutrients and the fixation of nitrogen from the atmosphere. The nutrient cycle includes the decomposition of dead bodies; bacteria are responsible for the putrefaction stage in this process. In the biological communities surrounding hydrothermal vents and cold seeps, extremophile bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. Bacteria also live in mutualistic, commensal and parasitic relationships with plants and animals. Most bacteria have not been characterised and there are many species that cannot be grown in the laboratory. The study of bacteria is known as bacteriology, a branch of microbiology.
The prokaryotic cytoskeleton is the collective name for all structural filaments in prokaryotes. It was once thought that prokaryotic cells did not possess cytoskeletons, but advances in visualization technology and structure determination led to the discovery of filaments in these cells in the early 1990s. Not only have analogues for all major cytoskeletal proteins in eukaryotes been found in prokaryotes, cytoskeletal proteins with no known eukaryotic homologues have also been discovered. Cytoskeletal elements play essential roles in cell division, protection, shape determination, and polarity determination in various prokaryotes.
A prokaryote is a single-cell organism whose cell lacks a nucleus and other membrane-bound organelles. The word prokaryote comes from the Ancient Greek πρό 'before' and κάρυον 'nut, kernel'. In the two-empire system arising from the work of Édouard Chatton, prokaryotes were classified within the empire Prokaryota. But in the three-domain system, based upon molecular analysis, prokaryotes are divided into two domains: Bacteria and Archaea. Organisms with nuclei are placed in a third domain, Eukaryota.
Cellular microbiology is a discipline that bridges microbiology and cell biology.
Gliding motility is a type of translocation used by microorganisms that is independent of propulsive structures such as flagella, pili, and fimbriae. Gliding allows microorganisms to travel along the surface of low aqueous films. The mechanisms of this motility are only partially known.
Edward Francis DeLong, is a marine microbiologist and professor in the Department of Oceanography at the University of Hawaii, Manoa, and is considered a pioneer in the field of metagenomics. He is best known for his discovery of the bacterial use of the rhodopsin protein in converting sunlight to biochemical energy in marine microbial communities.
Lucy Shapiro is an American developmental biologist. She is a professor of Developmental Biology at the Stanford University School of Medicine. She is the Virginia and D.K. Ludwig Professor of Cancer Research and the director of the Beckman Center for Molecular and Genetic Medicine.
Urs Jenal is a Swiss Microbiologist and Professor at the Biozentrum University of Basel, Switzerland.
Jorge Enrique Galán is an Argentinian-American microbiologist who specializes in infectious disease, bacterial pathogenesis including Salmonella.
Mary Osborn is a L'Oréal-UNESCO Women in Science Award-winning English cell biologist who, until she stopped running an active laboratory in 2005, was on the scientific staff at the Max Planck Institute for Biophysical Chemistry, Göttingen, Germany. Osborn established two techniques frequently used by cell biologists. She pioneered both molecular weight determination of proteins using SDS PAGE and immunofluorescence microscopy. Osborn also used the immunofluorescence microscopy method to work out the details of the eukaryotic cytoskeleton. Small differences in the intermediate filament constituents helped her distinguish differentiated cells from each other. She also found intermediate filament immunofluorescence differences between normal versus cancer cells. Mary Osborn has been a prominent spokesperson for women in science.
Cyanobacterial morphology refers to the form or shape of cyanobacteria. Cyanobacteria are a large and diverse phylum of bacteria defined by their unique combination of pigments and their ability to perform oxygenic photosynthesis.
Rut Carballido Lopez also spelled Carballido-Lopez is a Spanish-born microbiologist and research team leader in France. She won an Irène-Joliot-Curie Prize in 2015.
References
- ↑ "Christine Jacobs-Wagner | Department of Biology". biology.stanford.edu. Retrieved 2024-02-14.
- 1 2 3 4 5 6 7 8 9 "Christine Jacobs-Wagner: Drawing the bacterial organizational chart". Journal of Cell Biology. Retrieved October 21, 2018.
- ↑ Griswold, Ann (2016). "Q n As with Christine Jacobs-Wagner". Proceedings of the National Academy of Sciences. 113 (33): 9129–9130. doi: 10.1073/pnas.1611062113 . PMC 4995983 . PMID 27506783.
- ↑ Hopkin, Karen (April 1, 2008). "A Fierce Competitor". The Scientist. Retrieved October 22, 2018.
- 1 2 3 4 5 6 7 8 "Blavatnik Awards Christine Jacobs-Wagner". Blavatnik Foundation. Retrieved October 20, 2018.
- 1 2 3 "Christine Jacobs-Wagner". Yale Medical School. Retrieved October 20, 2018.
- ↑ "Christine Jacobs-Wagner". National Academy of Sciences. Retrieved October 20, 2018.
- ↑ "Women in Cell Biology Awards (Amer Soc for Cell Biol)". American Society for Cell Biology. Retrieved October 22, 2018.
| International | |
|---|---|
| National | |
| Academics | |
