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Topic: Organelle

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In the News (Tue 25 Jun 19)

Organelle DB compiles protein localization data from organisms spanning the eukaryotic kingdom and presents an organized catalog of the known protein constituents of more than 50 organelles, subcellular structures, and protein complexes.
In particular, Organelle DB is a central repository of yeast protein localization data, incorporating results from both previous and current (ongoing) large-scale studies of protein localization in Saccharomyces cerevisiae.
In total, Organelle DB is a singular resource consolidating our knowledge of the protein composition of eukaryotic organelles and subcellular structures.
organelledb.lsi.umich.edu   (219 words)

  Highbeam Encyclopedia - Search Results for Organelle
Membrane-enclosed organelle found in all eukaryotic cells (eukaryote) that is responsible for the cell's digestion of macromolecules, old cell parts, and microorganisms.
Cytoskeletal architecture and organelle transport in giant syncytia formed by fusion of hexactinellid sponge tissues.
Inhibition of microtubule-dependent, minus-end directed transport of axoplasmic organelles by an antibody specific for the intermediate chain of dynein.
www.encyclopedia.com /SearchResults.aspx?Q=Organelle   (1268 words)

 Evolutionary & Integrative Genomics
Sequence determination of complete organelle genomes provides the data for genome bioinformatics, the investigation of organelle genome evolution and the molecular phylogeny of protists.
GOBASE is a relational organelle genome database, which integrates sequence data, RNA secondary structures, physical and gene maps, information on biochemical pathways, taxonomy, evolution, and more.
The goal of FMGP is to sequence complete mitochondrial genomes from all major fungal lineages, to resolve the fungal branch of the 'tree of life', and to investigate mitochondrial gene expression, introns and mobile elements.
megasun.bch.umontreal.ca /welcome.html   (296 words)

 Chemical & Engineering News: Latest News - Organelle Anatomy
Using a combination of biophysical and proteomic techniques, European and Japanese scientists examined quantitatively the relative ratios of the lipids and 180 or so proteins that adorn synaptic vesicles, the compartments that house and traffic neurotransmitters essential for brain function (Cell 2006, 127, 671).
The "big surprise" was the overall density of protein on the membrane of these vesicles, says author Reinhard Jahn, a neurobiologist at Max Planck Institute for Biophysical Chemistry in Göttingen, Germany.
The high abundance of SNARE proteins in synaptic vesicles could increase the speed of fusion and, consequently, synaptic transmission, Jahn says.
pubs.acs.org /cen/news/84/i47/8447organelle.html   (428 words)

  NCBI Organelle Genome Resources
Mitochondria and chloroplasts (a type of plastid) are membrane-bound organelles that convert energy from foodstuffs (mitochondria) or sunlight (chloroplasts) into forms that can be used by the cell.
The organelles likely evolved from bacteria that were endocytosed more than one billion years ago.
Although the organelles maintain their own genomes, many genes encoding mitochondrial and chloroplast proteins are found in the cell nucleus.
www.ncbi.nlm.nih.gov /genomes/ORGANELLES/organelles.html   (328 words)

  Organelle - Wikipedia, the free encyclopedia
Organelles: (1) nucleolus (2) nucleus (3) ribosome (4) vesicle (5) rough endoplasmic reticulum (ER) (6) Golgi apparatus (7) Cytoskeleton (8) smooth ER (9) mitochondria (10) vacuole (11) cytoplasm (12) lysosome (13) centrioles
In cell biology, an organelle is one of several structures with specialized functions enclosed by a membrane, suspended in the cytosol of a eucaryotic cell.
Organelles were historically identified through the use of microscopy, and were also identified through the use of cell fractionation.
en.wikipedia.org /wiki/Organelle   (158 words)

 Organelle - EvoWiki   (Site not responding. Last check: )
Organelle as its suffix intimates is a term used to describe the 'little' organs within cells.
Organelles are a feature of eukaryotic cells and the debate as to origin of such functional compartmentalization is a controversial part of evolutionary theory.
However, uniquely among organelles, they contain their own DNA and one suggestion as to their origin is that early bacteria were subsumed inside the cells of another.
wiki.cotch.net /index.php/Organelle   (160 words)

 Organelle: Facts and details from Encyclopedia Topic   (Site not responding. Last check: )
A centriole in biology is a hollow cylindrical organelle found in most animal cells, and cells of fungi and algae though not frequently in plants...
A melanosome is a cellular organelle containing melanin, the commonest light-absorbing pigment found in the animal kingdom....
The cytosol (as opposed to cytoplasm, which also includes the organelles) is the internal fluid of the cell, and a large part of cell metabolism occurs...
www.absoluteastronomy.com /encyclopedia/o/or/organelle.htm   (956 words)

 NationMaster - Encyclopedia: Organelle   (Site not responding. Last check: )
A few large organelles probably originated from endosymbiont bacteria: An endosymbiont is any organism that lives within the body or cells of another organism, i.
Amyloplasts in a potato cell Amyloplasts (are a form of leucoplasts) are non-pigmented organelles found in plant cells responsible for the storage of starch through the polymerisation of glucose.
In cell biology, an organelle is one of several structures with specialized functions, suspended in the cytoplasm of a eukaryotic cell.
www.nationmaster.com /encyclopedia/Organelle   (1830 words)

 Organelle   (Site not responding. Last check: )
In biology, particularly cell biology, the term organelle is used to describe several structures with specialized functions, suspended in the cytoplasm of a eukaryotic cell.
Organelles were historically identified through the use of some form of microscopy and were also identified through the use of cell fractionation.
StressGen Biotechnologies Corp. Antibodies, proteins and probes for heat shock proteins, chaperonins and organelle markers; used in stress response, signal transduction, neurobiology and vesicular trafficking research.
www.serebella.com /encyclopedia/article-Organelle.html   (310 words)

 Organelle genomes
Organelle genomes occur in a variety of sizes and topologies.
The smallest organelle genomes (mammalian mitochondria) are so small that they can only contain a very small set of genes, while the largest are as large as, or larger than those of many bacteria.
Animal parasites in the Apicomplexan group contain an organelle whose genome sequence indicates that it was derived from plastids (rev).
opbs.okstate.edu /~melcher/MG/MGW1/MG1371.html   (208 words)

 BBC NEWS | Science/Nature | Cell evolution puzzle
Finding a self-contained organelle inside a prokaryote is a puzzle as it suggests that the evolution of cells - the basic building blocks of higher organisms - may have to be reconsidered.
He says it is significant that the same organelle is found in the more complicated eukaryotes implying that it may have a common evolutionary origin for both types of cell.
Because the organelle is not present in animal cells, it may be a useful target for chemotherapy for those diseases.
news.bbc.co.uk /2/hi/science/nature/3003946.stm   (459 words)

 Organelle   (Site not responding. Last check: )
In cell biology an organelle is one of several structures with functions suspended in the cytoplasm of a eukaryotic cell.
Organelles were historically identified through the of some form of microscopy and were also identified through the of cell fractionation.
Organelles, Genomes and Eukaryote Phylogeny: An Evolutionary Synthesis in the Age of Genomics
www.freeglossary.com /Organelles   (111 words)

 Organelle's discovery challenges theory, could alter approach to disease treatment
"The organelle we found in the bacterium Agrobacterium tumefaciens is practically identical to the organelle called acidocalcisome in unicellular eukaryotes," said Roberto Docampo, a professor of veterinary pathobiology in the College of Veterinary Medicine at the University of Illinois at Urbana-Champaign.
He soon determined that a tiny granule in yeast, fungi and bacteria, thought to be for storage, was a fully operational organelle containing pyrophosphatase, a pump-like enzyme that allows proton transport.
The existence of discrete organelles is a defining component of unicellular eukaryotes, which have membrane-bound nuclei and specialized structures in their cell boundaries.
www.eurekalert.org /pub_releases/2003-06/uoia-odc061703.php   (614 words)

 ScienceDaily: Organelle   (Site not responding. Last check: )
Organelle's Discovery Challenges Theory, Could Alter Approach To Disease Treatment (June 18, 2003) -- Researchers looking inside a pathogenic soil bacterium have found an organelle, a subcellular pouch, existing independently from the plasma membrane.
Organelle -- In cell biology, an organelle is one of several structures with specialized functions, suspended in the cytoplasm of a eukaryotic...
Mitochondrion -- In cell biology, a mitochondrion (plural mitochondria) is an organelle found in most eukaryotic cells.
www.sciencedaily.com /encyclopedia/organelle   (1271 words)

 Heteroplasmy and Organelle Gene Dynamics -- Chesser 150 (3): 1309 -- Genetics
of organelle gene diversity and the maintenance of heteroplasmy.
Of course mutation can cause heteroplasmy regardless of the means of organelle inheritance, and variation can be present in the gametes of either or both parents when organelle genes are diparentally transmitted.
The zygotes of progeny born in the population
www.genetics.org /cgi/content/full/150/3/1309   (6631 words)

 NIGMS -- Inside the Cell
The chlorophyll-containing organelle in green plants in which light energy is converted into sugars.
An organelle composed of membranous sacs that packages proteins into vesicles and sends them to the cell's surface or to lysosomes.
A thin, tubular organelle that acts as a structural support for the cell.
www.medhelp.org /NIHlib/GF-119.html   (1009 words)

 Search Results for "Organelle"
...A cellular organelle associated with the formation of cilia and flagella and similar to the centriole in structure.
...A membrane-bound organelle in the cytoplasm of most cells containing various hydrolytic enzymes that function in intracellular digestion.
...A membrane-bound organelle found in certain protists that pumps fluid in a cyclical manner from within the cell to the outside by alternately filling and then contracting...
www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=Organelle   (296 words)

 PCB5065 Organelle Genetics
Organelle genomes are associated with proteins and organized into nucleoprotein complexes called nucleoids, at times attached to the organelle membranes.
The segregation of organelles has not been carefully studied in megagametogenesis of plant species exhibiting paternal inheritance, so the mechanisms by which maternal organelles might be excluded are not currently known.
Most of the organelle genome population must be converted to the transformed genotype before the selectable transgene will be expressed at the cellular level.
www.hos.ufl.edu /ctdcweb/pcb5065II.htm   (4662 words)

 [No title]   (Site not responding. Last check: )
A cell nucleus (pl. nuclei) is an organelle found in certain types of cells, called eucaryotic cells.
An endoplasmic reticulum (pl. reticula) is an organelle which transports protein molecules from one part of the cell to another.
A chloroplast is an organelle, found in the cells of plants, in which the metabolic process of photosynthesis takes place.
www36.pair.com /waldzell/Library/Inventory/Liv/Organelle.html   (227 words)

 Rational Analyses of Organelle Trajectories in Tobacco Pollen Tubes Reveal Characteristics of the Actomyosin ...
Shown are data on 81 organelles collected from a sequence of 39.6 s, in the apex of cell 1.
The velocity fluctuations of organelles transported in crustacean and human axons are random.
Organelle movement and fibrillar elements of the cytoskeleton in the angiosperm pollen tube.
www.biophysj.org /cgi/content/full/76/3/1648   (5329 words)

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