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Topic: Satellite virus


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  Title of Invention: Vector
That is, the present invention relates to a vector comprising a satellite RNA of a plant virus, and the vector is constructed by inserting an exogenous RNA fragment into a satellite while its replication ability is maintained within the limits of the possibilities to change it to a chimeric RNA molecule.
Satellite RNAs used in the invention are not limited to those derived from CMV, and those having the same effect in spite of the difference in a partial base sequence fall within the invention.
Since a virus used as a vector in the invention is a satellite, simultaneous inoculation thereof with the helper virus is necessary.
www.nal.usda.gov /bic/Biotech_Patents/1994patents/05304731.html   (3649 words)

  
 Molecular Dynamics of STMV
Satellite Tobacco Mosaic Virus is a small, icosahedral plant virus which worsens the symptoms of infection by Tobacco Mosaic Virus (TMV).
Satellite viruses are some of the smallest possible reproducing units in nature; they achieve this by relying on both the host cell and a host virus (in this case, TMV) for the machinery necessary for them to reproduce.
The mechanism through which the virus assembles has not yet been discovered through experimental techniques; among the most critical questions is whether STMV assembly is primarily driven by the capsid or the viral RNA.
www.ks.uiuc.edu /Research/STMV   (840 words)

  
 Plant viruses
Satellite viruses are dependent for its replication on the presence of a second, independently replicating virus.
Cucumber mosaic virus (CMV) is a polyhedral virus - particles are 30 nm diameter.
BYDV is a polyhedral virus 25 nm in diameter.
www.clt.astate.edu /dgilmore/Virology/plant_viruses.htm   (4191 words)

  
 Virus classification - Wikipedia, the free encyclopedia
Virus classification is based mainly on phenotypic characteristics, including morphology, nucleic acid type, mode of replication, host organisms, and the type of disease they cause.
Other classifications are determined by the disease caused by the virus or its morphology, neither of which are satisfactory due to different viruses either causing the same disease or looking very similar.
The deadly Ebola and Marburg viruses are well known members of this group, along with influenza virus, measles, mumps and rabies.
en.wikipedia.org /wiki/Virus_classification   (755 words)

  
 ICTVdB Virus Description - 81. Satellites
Satellites are sub-viral agents composed of nucleic acid molecules that depend for their productive multiplication on co-infection of a host cell with a helper virus.
Satellite nucleic acids have substantially distinct nucleotide sequences from those of the genomes of either their helper virus or host.
When a satellite encodes the coat protein in which its nucleic acid is encapsidated it is referred to as a satellite virus.
www.ictvdb.rothamsted.ac.uk /ICTVdB/64000000.htm   (382 words)

  
 ICTVdB Virus Description - 81.001. Satellite Viruses
This is a description of a vertebrate satellite virus at the category equivalent to family level.
Satellite capsid is isometric and exhibits icosahedral symmetry with a diameter of 26-28 nm.
Translation: Virions are associated with helper virus and dependent on co-infection of helper virus during replication, or are associated with helper virus, but independent from its functions during replication (under permissive conditions in cultured cells.
www.ictvdb.rothamsted.ac.uk /ICTVdB/81.001.htm   (430 words)

  
 Appendix - Are viruses alive?
A virus may even be said to be "designed" in a way to enable it to easily penetrate its host, take over the host cells and force them to make more copies of itself - in other words, it appears to possess intrinsic finality.
It may be objected that the simple structure of a virus precludes it from possessing a nested hierarchy of organisation, one of the defining properties of living things.
Some viruses, according to Rybicki (1998), are associated with satellite viruses: for instance, the tobacco necrosis satellite virus, which depends for its replication on the presence of the tobacco necrosis virus.
www.angelfire.com /linux/vjtorley/viruses.html   (1027 words)

  
 Landsat Used To Identify Areas At Risk for Deadly Virus   (Site not responding. Last check: 2007-10-09)
Scientists named the virus after a stream near where the first cases were reported, and identified it as a member of the hantavirus genus.
Researchers working with Landsat imagery showed that it is possible to correlate subtle environmental changes to increased incidences of the virus in mice, which pass the disease to humans, said Gregory Glass, a microbiologist with the Johns Hopkins Bloomberg School of Public Health in Baltimore.
The paper, "Satellite Imagery Characterizes Local Animal Reservoir Populations of Sin Nombre Virus in the Southwestern United States," appeared in the Dec. 24, 2002, issue of the Proceedings of the National Academy of Sciences.
www.space.com /spacenews/archive03/landsatarch_021103.html   (900 words)

  
 Fuchs M, Ferreira S, Gonsalves D, 1997. Management of Virus Diseases by Classical and Engineered Protection. Molecular ...
Second, there is a theoretical possibility that the mild virus strain or a benign satellite RNA may mutate to a severe form and cause significant damage, and lastly, the use of a 'live' virus to deliberately inoculate healthy plants is against the intuitive thinking of most plant pathologists and growers.
Given the substantial reduction of virus incidence, transgenic plants are also likely to significantly lower the probability of transmission of vector-borne viruses by reducing the acquisition efficiency of the vectors.
Virus resistant papaya derived from tissues bombarded with the coat protein gene of papaya ringspot virus.
www.bspp.org.uk /mppol/1997/0116fuchs   (13135 words)

  
 Defective Interfering RNAs of a Satellite Virus -- Qiu and Scholthof 75 (11): 5429 -- The Journal of Virology
a defective-interfering RNA (DI) of a satellite virus.
Genetic diversity of panicum mosaic virus satellite RNAs in St. Augustinegrass.
Analysis of the genome of satellite panicum mosaic virus.
jvi.asm.org /cgi/content/full/75/11/5429   (2514 words)

  
 Plant Viruses Online - Tobacco mosaic satellivirus
The sequence of tobacco mosaic satellite virus genomic RNA indicates that, probably, much of it is base paired.
Tobacco necrosis satellite, panicum mosaic satellite, and maize white line mosaic satellite viruses.
This satellite virus is found naturally associated with tobacco mild green mosaic tobamovirus, but can be experimentally coinfect with any of tobamoviruses.
image.fs.uidaho.edu /vide/descr802.htm   (588 words)

  
 RNA SATELLITE STOPS KILLER TOMATO VIRUS
The researchers are currently field testing a crop of tomatoes bioengineered to include a protective viral satellite to see how well they withstand attack from the cucumber mosaic virus.
The virus is also among the worst virus pests of crops in Japan, China, Italy, Egypt and other countries.
The scientists use several precautionary measures to contain the virus and satellite to the test plot.
www.accessexcellence.org /WN/SUA06/tom.html   (579 words)

  
 SGI - Feature Story: Imitation of Life
The satellite tobacco mosaic virus - it's called a satellite virus because it relies on a host cell and a primary virus to reproduce - attacks tomato and tobacco plants throughout the US, leading to mosaic-like discolorations.
While the virus attacks plants, the researchers predict that someday, drugs for animals or even humans may be designed and refined with the help of computer-based simulations like the one developed in Illinois.
The satellite tobacco mosaic virus is so small that biologists refer to it as a particle.
www.sgi.com /features/2006/june/ncsa   (1076 words)

  
 ScienceDaily: Researchers Simulate Complete Structure Of Virus -- On A Computer
The satellite virus they chose is a spherical RNA sub-viral agent that is so small and simple that it can only proliferate in a cell already hijacked by a helper virus – in this case the tobacco mosaic virus that is a serious threat to tomato plants.
Virus -- A virus is a submicroscopic parasite that infects cells in biological organisms.
Epstein-Barr virus -- The Epstein-Barr virus (EBV), also called Human herpesvirus 4 (HHV-4), is a virus of the herpes family (which includes Herpes simplex virus and Cytomegalovirus), and is one of the most common viruses...
www.sciencedaily.com /releases/2006/03/060316092958.htm   (1989 words)

  
 Plant Viruses Online - Tobacco necrosis satellivirus
Virus transmitted by mechanical inoculation; not transmitted by seed.
L06057 Em(40)_vi:TNSUTR Gb(84)_vi:TNSUTR Satellite tobacco necrosis virus RNA sequence.
M20900 Em(40)_vi:TNSFRNA Gb(84)_vi:TNSFRNA Satellite tobacco necrosis virus (STNV) folded RNA region with an unidentified ORF, 5´ end.
image.fs.uidaho.edu /vide/descr806.htm   (368 words)

  
 In Vitro- and In Vivo-Generated Defective RNAs of Satellite Panicum Mosaic Virus Define cis-Acting RNA Elements ...
The nucleotide sequence of satellite tobacco necrosis virus strain C and helper-assisted replication of wild-type and mutant clones of the virus.
Specific sequence changes in the 5'-terminal region of the genome of satellite tobacco mosaic virus are required for adaptation to tobacco mosaic virus.
A gene cluster encoded by panicum mosaic virus is associated with virus movement.
jvi.asm.org /cgi/content/full/74/5/2247   (5036 words)

  
 Comparison between Hepatitis Delta virus and Hepatitis B virus
In today’s world, the Hepatitis B Virus is still a fairly prevalent retrovirus that mainly infects hepatocytes (liver cells); currently, over 2 billion people worldwide have been infected, and the virus causes various forms of liver damage including cirrhosis, hepatitis, and hepatocellular carcinoma (Vanlandschoot, 2003).
HDV is considered to be a satellite virus of Hepatitis B because by itself, HDV is unable to replicate completely (Goto et all, 2003).
The Hepatitis Delta structure is similar to the Hepatitis B structure, it is comprised of an envelope protein, circular genomic RNA, and delta antigens (Bordier, et all).
www.cas.vanderbilt.edu /fanninglab/virology/hdv-hbv.htm   (2445 words)

  
 Plant Pathology - Virology
In the field it is commonly associated with a satellite virus (SPMV) and satellite RNAs (satRNAs).
Although there are multiple factors that influence the ability of a virus to infect a plant, crucial events are viral movement and the evasion of resistance responses.
A separate research project involves a molecular characterization of a newly recognized virus on wheat and corn that is transmitted by wheat curl mites.
plantpathology.tamu.edu /research/virology.asp   (420 words)

  
 Crop Genetics and Breeding Research : Pearl Millet Diseases - Viral
Augustine decline virus (SADV) is a strain of of PMV.
Co-inoculation of Panicum Mosaic Virus (PMV) with its satellite virus (SPMV) results in a severe chlorotic mottle on pearl millet (Qui et al.
The virus is a mechanically transmitted 42S isometric particle, 17 nm in diameter.
www.ars.usda.gov /Research/docs.htm?docid=8927   (1014 words)

  
 SCOPE 44 - Introduction of Genetically Modified Organisms into the Environment, Chapter 7, Evolutionary Consequences of ...
It is for this reason that a number of strategies have been devised to subvert a virus or a portion of that virus to protecting a plant against infection.
Although every virulent form is not parasitized by a satellite virus, it may be possible to create or select ones in the laboratory by modifying the pathogen itself.
Virus and bacterially mediated transfer of genes between unrelated eukaryotes is very rare outside the laboratory, so for the moment it must be assumed that the horizontal dispersal of a gene is governed by the frequency of interspecific hybridization.
www.icsu-scope.org /downloadpubs/scope44/chapter07.html   (4631 words)

  
 Botany online: Plant Viruses and Viroids - Single-Stranded RNA-Viruses - TMV
The virus itself was not isolated till 1935 and not crystallized before 1937.
The genome of the alfalfa mosaic virus (AMV) consists of three molecules of RNA contained in three capsids (the B, M, and Tb-particle).
In satellite viruses, the infectiousness depends on the presence of a helper virus.
www.biologie.uni-hamburg.de /b-online/e35/35a.htm   (1817 words)

  
 A novel subviral agent associated with a geminivirus: The first report of a DNA satellite -- Dry et al. 94 (13): 7088 ...
Subviral agents, viroids, and satellites are well known in infectious RNA systems (1-4).
Both linear and circular satellites are found to be associated with plant RNA viruses (4).
More than 30 RNA viruses are currently recognized as having one or more satellites associated with them (2).
www.pnas.org /cgi/content/full/94/13/7088   (4214 words)

  
 Characteristics of the monocistronic genome of extra small virus, a virus-like particle associated with Macrobrachium ...
virus (satellite virus) and a larger virus (helper virus).
on its helper virus; genome distinct from that of the helper
Qiu, W. and Scholthof, K. In vitro- and in vivo-generated defective RNAs of satellite panicum mosaic virus define cis-acting RNA elements required for replication and movement.
vir.sgmjournals.org /cgi/content/full/85/3/643   (1858 words)

  
 Geotimes - December 2002 - West Nile Virus Mapping
Using satellite data, researchers at the National Aeronautics and Space Administration (NASA) are changing the way outbreak experts look at the disease.
From satellite imagery, NASA researchers are identifying features that can create such conditions, including patterns of vegetation, rainfall and land-surface temperatures, says Robert Venezia, NASA program manager for Public Health Applications.
This West Nile virus sample risk map for the northeast United States comes from NASA satellite data combined with disease control data from the CDC and state health departments.
www.geotimes.org /dec02/NN_westnile.html   (833 words)

  
 On the role of RNA silencing in the pathogenicity and evolution of viroids and viral satellites -- Wang et al. 101 (9): ...
On the role of RNA silencing in the pathogenicity and evolution of viroids and viral satellites -- Wang et al.
RPVSat is a full-length (322-nt) sequence of the cereal yellow dwarf virus RPV satellite.
of viroid and satellite genomic sequences and is intrinsic to
www.pnas.org /cgi/content/full/101/9/3275   (4273 words)

  
 Scientists build virtual version of real-life virus - LiveScience - MSNBC.com
In fact, the satellite virus is so simple that it can only infect a cell that has already been hijacked by another virus, the tobacco mosaic virus that infects a variety of plants.
The researchers used one of the world's largest and fastest computers to simulate all the atoms in a satellite virus and a small drop of water surrounding it.
Because of the enormous computing power involved, the virus was brought to digital life for a very brief period of time, only 50 nanoseconds.
www.msnbc.msn.com /id/12053745   (473 words)

  
 Genetic mapping of the compatibility between a lily isolate of Cucumber mosaic virus and a satellite RNA -- Yamaguchi ...
Gal-On, A., Kaplan, I. and Palukaitis, P. Differential effects of satellite RNA on the accumulation of cucumber mosaic virus RNAs and their encoded proteins in tobacco vs zucchini squash with two strains of CMV helper virus.
Kim, C.-H. and Palukaitis, P. The plant defense response to cucumber mosaic virus in cowpea is elicited by the viral polymerase gene and affects virus accumulation in single cells.
Roossinck, M. and Palukaitis, P. Differential replication in zucchini squash of a cucumber mosaic virus satellite RNA maps to RNA 1 of the helper virus.
vir.sgmjournals.org /cgi/content/full/86/8/2359   (5526 words)

  
 Researchers simulate complete structure of virus -- on a computer
For their first attempt to reverse engineer a life form in a computer program, computational biologists selected the satellite tobacco mosaic virus because of its simplicity and small size.
The satellite virus they chose is a spherical RNA sub-viral agent that is so small and simple that it can only proliferate in a cell already hijacked by a helper virus -- in this case the tobacco mosaic virus that is a serious threat to tomato plants.
A computer program was used to reverse engineer the dynamics of all atoms making up the virus and a small drop of salt water surrounding it.
www.eurekalert.org /pub_releases/2006-03/uoia-rsc031006.php   (633 words)

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