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Tuesday, May 12, 2020 | History

2 edition of Studies on the RNA"s of tobacco necrosis and satellite viruses. found in the catalog.

Studies on the RNA"s of tobacco necrosis and satellite viruses.

Angela Shoulder

Studies on the RNA"s of tobacco necrosis and satellite viruses.

by Angela Shoulder

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Published by University of Birmingham in Birmingham .
Written in


Edition Notes

Thesis (Ph.D.)- Univ. of Birmingham, Dept. of Virology.

ID Numbers
Open LibraryOL21354025M

  The results revealed that >90% of the encapsidated RNAs are host derived, although there is some selectivity of packaging for STNV-1 RNA and certain host RNAs. Comparison of the packaging efficiencies of mutant STNV-1 RNAs showed that they are encapsidated mainly according to their abundance within the cells, rather than the presence or absence of the putative PSs previously identified from in vitro by: 2. History and discovery. The tobacco necrosis virus was the virus that led to the discovery of the first satellite virus in Scientists discovered that the first satellite had the components to make its own protein shell. A few years later in , scientists discovered another symbiotic relationship with the tobacco ringspot neopvirus (TobRV) and another satellite virus.(unranked): Subviral agents.

Chkuaseli T, Newburn LR, Bakhshinyan D, White KA. () Protein expression strategies in Tobacco necrosis virus-D. Virology Ashton P, Wu B, D'Angelo J, Grigull J, White KA () Biologically-supported structural model for a viral satellite RNA. Nucleic Acids Res. White KA. () The polymerase slips and PIPO exists.   2. Satellites that resemble tobacco necrosis satellite virus. 3. Nodavirus-associated satellite virus. 4. Adenovirus-associated satellite virus (Dependovirus) 5. Mimivirus-associated satellite virus (Sputnik, virophage) 6. Single stranded DNAs. 6b. Betasatellites. 7. Double stranded RNAs. 8. Single stranded RNAs. 8b. Small linear single Book Edition: 1.

  D satellite RNA (satRNA) with its helper virus, namely, cucumber mosaic virus, causes systemic necrosis in tomato. The infected plant exhibits a distinct spatial and temporal cell death pattern. The distinct features of chromatin condensation and nuclear DNA fragmentation indicate that programmed cell death is involved. In addition, satRNA localization and terminal Cited by: Common Names of Plant Diseases H. D. Shew, primary collator (last update 2/19/93) BACTERIAL DISEASES Angular leaf spot Pseudomonas syringae pv. tabaci (Wolf & Foster) Young et al. Granville wilt Pseudomonas solanacearum (Smith) Smith Hollow stalk Erwinia carotovora subsp. carotovora (Jones) Bergey et al. E. caroto.


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Studies on the RNA"s of tobacco necrosis and satellite viruses by Angela Shoulder Download PDF EPUB FB2

Necrovirus is a recently coined name for a very small group, presently encompassing only tobacco necrosis virus (TNV) and possibly cucumber necrosis and melon necrotic spot virus.

Although TNV was Tobacco Necrosis, Satellite Tobacco Necrosis, and Related Viruses | SpringerLinkCited by: 8. Observations in the early I s first revealed that a defective virus, satellite tobacco necrosis virus (STNV), is associated with and depends on the presence of a hel per virus, tobacco necrosis virus (TNV), for its multiplication.

The nine chapters presented in this book provide contemporary reviews of research on defective RNAs, satellite RNA viruses, and dependent RNA viruses that require the presence of a helper virus in order to establish productive infections.

Since their initial identification nearly four decades ago. the small RNAs of multicomponent viruses became available was it possible to obtain clear translation results, in that these RNAs proved to yield only the respective viral coat proteins upon translation.

This was the case also for the RNA of the satellite of tobacco necrosis virus (STNV), a similarly small. satellite of tobacco necrosis virus (STNV), a similarly small RNA, although the translation product of this RNA did not correspondexactly in size andcharge to theviral coat protein.

IN a recent letter1 Grogan and Uyemoto reported that they were unable to obtain cultures of tobacco necrosis virus (TNV) free from satellite virus (SV) after repeated isolation of single lesions Cited by: 4.

the satellite tobacco necrosis virus: a single protein and its genetic code M. Reichmann Proceedings of the National Academy of Sciences Oct52 (4) ; DOI: /pnasCited by: The view that satellite RNAs (satRNAs) and satellite viruses are purely molecular parasites of their cognate helper viruses has changed.

Tobacco Necrosis Virus D (TNV-D), in the genus Betanecrovirus (family Tombusviridae), possesses a single-stranded, positive-sense RNA genome containing six open reading frames (ORFs).

Two 5'-proximal ORFs (1 and 2) encode overlapping polypeptides of 22 and 82 kDa (p22 and p82, respectively) which are both required for replication. The p22 auxiliary protein contains no replication motifs but.

In contrast, satellite viruses are satRNAs that encode and are encapsidated in their own capsid proteins (CPs). Certain satRNAs code for nonstructural proteins, but most satRNAs do not encode any functional protein products and are therefore thought to exert their biological functions through direct RNA by: RNAs of many viruses are translated efficiently in the absence of a 5' cap structure.

The tobacco necrosis virus (TNV) genome is an uncapped, nonpolyadenylated RNA whose translation mechanism has not been well investigated. Computational analysis predicted a cap-independent translation element (TE) within the 3' untranslated region (3' UTR) of TNV RNA that resembles the TE of barley yellow Cited by: The view that satellite RNAs (satRNAs) and satellite viruses are purely molecular parasites of their cognate helper viruses has changed.

The molecular mechanisms underlying the synergistic and/or antagonistic interactions among satRNAs/satellite viruses, helper viruses, and host plants are beginning to be comprehended. This review aims to summarize the recent achievements in basic and Cited by:   Observations in the early I s first revealed that a defective virus, satellite tobacco necrosis virus (STNV), is associated with and depends on the presence of a hel per virus, tobacco necrosis virus (TNV), for its : Springer Berlin Heidelberg.

Satellite viruses (SVs) are subviral pathogens that are entirely dependent upon the replication machinery of their helper viruses.

There are only four known plant SVs: satellite tobacco necrosis. Single-Stranded RNA Satellite Viruses. There are two subgroups in this type [15,23]: subgroup 1, Chronic bee-paralysis virus-associated satellite virus, which contains a single member, Chronic bee-paralysis satellite virus []; and subgroup 2, Tobacco necrosis satellite viruses, which include the four members Maize white-line mosaic satellite virus [], Panicum mosaic satellite virus.

A few years later inscientists discovered another symbiotic relationship with the tobacco ringspot neopvirus (TobRV) and another satellite virus. The emergence of satellite RNA is said to have come from either the genome of the host or its co-infecting agents, and any vectors (unranked): Subviral agents.

The 5' and 3' untranslated regions of satellite tobacco necrosis virus RNA affect translational efficiency and dependence on a 5' cap structure. The arginine-rich motif of bamboo mosaic virus satellite RNA-encoded P20 mediates self-interaction, intracellular targeting, and cell-to-cell movement.

Mol. Plant Microbe Interact. ().Author: Chung-Chi Hu, Yau-Heiu Hsu and Na-Sheng Lin. Buy Satellites and Defective Viral RNAs (Current Topics in Microbiology and Immunology) by Vogt, Peter K., Jackson, Andrew O.

(ISBN: ) from Amazon's Book Store. Everyday low prices and free delivery on eligible orders. Replication has been extensively studied for two model satellite viruses: satellite tobacco necrosis virus (STNV) and satellite tobacco mosaic virus (STMV).

STNV strain C (STNV-C) is well characterized (Bringloe et al., ). The tobacco necrosis virus (TNV) genome is an uncapped, nonpolyadenylated RNA whose translation mechanism has not been well investigated.

Computational analysis predicted a cap-independent translation element (TE) within the 3' untranslated region (3' UTR) of TNV RNA that resembles the TE of barley yellow dwarf virus (BYDV), a luteovirus.

3 Nodavirus-associated satellite virus. Satellite virus particles are found in Macrobrachium rosenbergii (giant river prawn) infected with Macrobrachium rosenbergii nodavirus (MrNV; a virus not yet classified but clearly related to viruses in the family Nodaviridae).The XSV (extra small virus) satellite virus particles are about 15 nm in diameter and serologically unrelated to those of MrNV.One of the best studied satellite systems is tobacco necrosis virus (TNV) and its satellite, tobacco necrosis virus satellite (TNVS).

TNV has a plus-strand RNA genome of about kb. The TNV virion is icosahedral with T =3, and contains copies of a single-coat protein species of about 30kDa.The 5'and 3'Untranslated Regions of Satellite Tobacco Necrosis Virus RNA Affect Translational Efficiency and Dependence on a 5'Cap Structure.