Abstract:
:This review compares the well-studied RNase H activities of human immunodeficiency virus, type 1 (HIV-1) and Moloney murine leukemia virus (MoMLV) reverse transcriptases. The RNase H domains of HIV-1 and MoMLV are structurally very similar, with functions assigned to conserved subregions like the RNase H primer grip and the connection subdomain, as well as to distinct features like the C-helix and loop in MoMLV RNase H. Like cellular RNases H, catalysis by the retroviral enzymes appears to involve a two-metal ion mechanism. Unlike cellular RNases H, the retroviral RNases H display three different modes of cleavage: internal, DNA 3' end-directed, and RNA 5' end-directed. All three modes of cleavage appear to have roles in reverse transcription. Nucleotide sequence is an important determinant of cleavage specificity with both enzymes exhibiting a preference for specific nucleotides at discrete positions flanking an internal cleavage site as well as during tRNA primer removal and plus-strand primer generation. RNA 5' end-directed and DNA 3' end-directed cleavages show similar sequence preferences at the positions closest to a cleavage site. A model for how RNase H selects cleavage sites is presented that incorporates both sequence preferences and the concept of a defined window for allowable cleavage from a recessed end. Finally, the RNase H activity of HIV-1 is considered as a target for anti-virals as well as a participant in drug resistance.
journal_name
Virus Resjournal_title
Virus researchauthors
Schultz SJ,Champoux JJdoi
10.1016/j.virusres.2007.12.007subject
Has Abstractpub_date
2008-06-01 00:00:00pages
86-103issue
1-2eissn
0168-1702issn
1872-7492pii
S0168-1702(07)00460-1journal_volume
134pub_type
杂志文章,评审相关文献
VIRUS RESEARCH文献大全abstract::Positive-strand RNA viruses exist as a quasi-species due to the incorporation of mutations into the viral genome during replication by the virus-encoded RNA-dependent RNA polymerase (RdRP). Therefore, the RdRP is often described as a low-fidelity enzyme. However, until recently, a complete description of the kinetic, ...
journal_title:Virus research
pub_type: 杂志文章,评审
doi:10.1016/j.virusres.2004.11.004
更新日期:2005-02-01 00:00:00
abstract::A new virus termed Rosellinia necatrix megabirnavirus 2 (RnMBV2) was molecularly and biologically characterized. RnMBV2 was originally harbored in isolate W8 of R. necatrix co-infected with the previously reported virus Rosellinia necatrix partitivirus 1 (RnPV1). RnMBV2 has molecular features similar and different fro...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2015.12.009
更新日期:2016-07-02 00:00:00
abstract::We determined the nucleotide sequence of a 3,811 base pair (bp) region of the bovine herpesvirus type-1 (BHV-1) HindIII-A fragment covering map units 0.429-0.456, which contained the HSV-1 homologues of the UL25, UL26 and UL26.5 genes. Sequence overlap was verified with previously published BHV-1 sequences, resulting ...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/s0168-1702(96)01420-7
更新日期:1997-04-01 00:00:00
abstract::It was previously reported that during serial passage of a BHK-derived cell line persistently infected with foot-and-mouth disease virus, (termed C1-BHK-Rc1) the virus became increasingly more virulent for BHK-21 cells (de la Torre et al 1988). Virus strains isolated from different cell passage levels were tested for ...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(90)90084-o
更新日期:1990-12-01 00:00:00
abstract::The immunopathogenesis of severe hand, foot and mouth disease (HFMD) remains elusive. This study revealed that enterovirus 71 (EV71) epitope-specific CD4+ T cell responses of HFMD patients were skewed toward a Th2 cytokine profile. Patients that demonstrated higher levels of IL-4 expression in their CD4 T cells follow...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2013.07.009
更新日期:2013-10-01 00:00:00
abstract::Fifteen stable mouse spleen cell myeloma hybrids (hybridomas) producing monoclonal antibodies to rinderpest virus proteins were produced. The specificity of these monoclonal antibodies was established by radioimmunoprecipitation followed by polyacrylamide gel analysis and immunofluorescence. Nine antibodies were speci...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(89)90091-9
更新日期:1989-04-01 00:00:00
abstract::Subtype C is the most prevalent HIV-1 subtype globally and a common circulating recombinant form virus, CRF_BC, is predominant in China. It is unclear whether subtype C-based vaccines are capable of neutralizing CRF_BC viruses or can be evaluated using a neutralization assay based on CRF_BC pseudoviruses. Phylogenetic...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2010.09.012
更新日期:2011-01-01 00:00:00
abstract::Fowlpox virus (FWPV) is currently used as a vector to express foreign genes of various poultry and mammalian pathogens. However, due to limited information available about the primary structure of FWPV promoters required for an optimal transcriptional efficiency, the full potential of FWPV as an expression vector has ...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2005.08.017
更新日期:2006-03-01 00:00:00
abstract::Tobacco mosaic virus (TMV) is a positive-sense plant RNA virus which has a wide host range and a worldwide distribution. Other than a troublesome pathogen, TMV is regarded as a model system pioneering biologic research for a century. The tomato strain of TMV has been recognized to be a distinct tobamovirus as the toma...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2011.09.006
更新日期:2012-01-01 00:00:00
abstract::Several cell surface molecules have been implicated in rotavirus cell entry, however, their individual relevance during this process is unknown. In this work, the expression of integrins alpha2, beta2, and alpha v beta 3, the heat shock cognate protein 70, and of ganglioside GM1 in different cell lines of human and si...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2009.07.013
更新日期:2009-11-01 00:00:00
abstract::A putative nucleoside triphosphate phosphohydrolase (NTPase) gene of African swine fever virus was identified by using a degenerate oligonucleotide probe derived from the nucleoside triphosphate binding motif, which is highly conserved among viral and cellular NTPases. The probe hybridized with fragments SalI E and Ec...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(93)90016-g
更新日期:1993-10-01 00:00:00
abstract::The nature of the interaction between papillomaviruses (PV) and their infected host has led to the identification of ways in which the viral oncoproteins can transform the infected host cells into cancer cells. As viral persistence is required for malignancy, and persistence requires avoidance of immune attack by the ...
journal_title:Virus research
pub_type: 杂志文章,评审
doi:10.1016/s0168-1702(02)00123-5
更新日期:2002-09-01 00:00:00
abstract::Eighteen monoclonal antibodies were produced against three Australian bovine enterovirus serogroups. Based on their binding patterns to 14S subunits, natural empty capsids and virions of 4 selected viral isolates (K2577, SL305, 66/27, J2129) in two types of quantitative ELISAs, the 18 antibodies were shown to belong t...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(90)90050-l
更新日期:1990-07-01 00:00:00
abstract::Cricket paralysis virus (Dicistroviridae: Cripavirus) (CrPV) naturally has a wide range of insect hosts which is reflected in its ability to infect several cultured insect cell lines. The expression of viral gene products is controlled by two kinds of internal ribosome entry site (IRES) elements, 5' and intergenic (IG...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/s0168-1702(03)00139-4
更新日期:2003-08-01 00:00:00
abstract::Analysis of 22 complete sequences of double-stranded DNA viruses reveals striking compositional asymmetries between leading and lagging, and between transcribed and non-transcribed strands. In all bi-directionally replicated genomes analyzed, the observed leading strand GC skew (measuring relative excess of guanines v...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/s0168-1702(98)00139-7
更新日期:1999-03-01 00:00:00
abstract::The core proteins of epizootic haemorrhagic disease virus (EHDV) have important roles to perform in maintaining the structure and function of the virus. A complete genetic and phylogenetic analysis was therefore performed on these proteins (and the genes that code for them) to allow comparison of the selective pressur...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2009.07.011
更新日期:2009-11-01 00:00:00
abstract::Hepatitis A virus (HAV) is an important human pathogen causing hepatitis, with high incidence in developed as well as in developing countries. No vaccines are available. In order to determine the primary structure of the HAV genome, we have prepared cDNAs from viral RNA and cloned these into plasmid pBR322. These clon...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(87)90026-8
更新日期:1987-08-01 00:00:00
abstract::Entomopoxviruses are an important group of viruses infecting only insects. They belong to Poxviridae which infect both invertebrates and vertebrates, including humans. Protein kinases are known to have roles at virus morphogenesis, host selectivity, the regulation of cell division and apoptosis in some vertebrate poxv...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2018.02.007
更新日期:2018-03-15 00:00:00
abstract::Utilizing the reverse transcriptase-polymerase chain reaction (RT-PCR) procedure, we have synthesized full-length copies of segment 10 from African horsesickness virus (AHSV) serotypes 1, 4 and 8. The genes were cloned, sequenced and compared with the sequence of the cognate gene from AHSV serotypes 3 and 9. Sequences...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(94)90052-3
更新日期:1994-08-01 00:00:00
abstract::In order to analyse the occurrence of viral haemorrhagic septicaemia virus (VHSV) in the marine environment surrounding Denmark, fish tissue samples were collected on four cruises with the research vessel H/S Dana in 1996 and 1997. The sampling comprised 923 samples totalling 7344 fish representing 29 different specie...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/s0168-1702(99)00062-3
更新日期:1999-09-01 00:00:00
abstract::This review focuses on new or improved technologies currently being applied, or likely to be applied in the future, to worldwide research on plant virus epidemiology. Recent technological advances and innovations provide many opportunities to improve understanding of the way diverse types of plant virus epidemics deve...
journal_title:Virus research
pub_type: 杂志文章,评审
doi:10.1016/j.virusres.2013.11.003
更新日期:2014-06-24 00:00:00
abstract::To determine the evolutionary and phylodynamic history of DENV-1 in Guangdong, the strains detected between 1985 and 2015 were determined with phylogenetic and Bayesian analyses of the E gene. Three DENV-1 genotypes (I, V, and VI) were circulating in Guangdong, and genotype I was detected most frequently. The evolutio...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2018.07.005
更新日期:2018-09-02 00:00:00
abstract::Apoptosis is frequently induced to inhibit virus replication during infection of Enterovirus 71 (EV71). On the contrary, anti-apoptotic pathway, such as PI3K/Akt pathway, is simultaneously exploited by EV71 to accomplish the viral life cycle. The relationship by which EV71-induced apoptosis and PI3K/Akt signaling path...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2014.07.026
更新日期:2014-11-04 00:00:00
abstract::Typically plasma viremia is controlled in macaques challenged with R5 tropic SHIV162P3 during the chronic phase of infection. However, in a few infected animals it sustains for a prolonged period. Persistent plasma viremia in two such macaques led to a rapid decline of CD4+ T-cells in blood leading to the induction of...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2010.04.006
更新日期:2010-08-01 00:00:00
abstract::The genomes of eight hepatitis A virus (HAV) strains originating from far distant geographic regions such as Europe, North Africa, Middle and North America, Australia and The People's Republic of China were compared by RNase T1 oligonucleotide mapping. For this purpose, the viruses were propagated in cell cultures and...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(85)90020-6
更新日期:1985-12-01 00:00:00
abstract::Acute hemorrhagic conjunctivitis (AHC) is a self-limiting viral infection of the eyes but having epidemic potential. In winter 2004-2005, an outbreak of acute hemorrhagic conjunctivitis (AHC) occurred in Islamabad, Pakistan. The etiological agent was confirmed as coxsackievirus A24 variant (CA24v) by virus isolation a...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2008.06.011
更新日期:2008-10-01 00:00:00
abstract::Equine herpesvirus type 1 and 4 (EHV-1 and EHV-4) are important pathogens of horses worldwide. Infection with EHV-4 usually remains restricted to the upper respiratory tract, whereas infection with EHV-1 can generalize after leukocyte-associated viremia. Here we examined whether differences in the immunomodulatory gly...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2012.07.029
更新日期:2012-10-01 00:00:00
abstract::A sero-epidemiologic survey of 74 IVDUs and 86 age-matched controls was performed to investigate the prevalence, clinical significance, and genetic distribution of GB virus C (GBV-C)/hepatitis G virus (HGV) infection among intravenous drug users (IVDUs) in Japan. GBV-C/HGV RNA was detected by reverse transcriptase-hem...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/s0168-1702(97)01470-6
更新日期:1997-06-01 00:00:00
abstract::Blackberry yellow vein disease is the most important viral disease of blackberry in the United States. Experiments were conducted to characterize a new virus identified in symptomatic plants. Molecular analysis revealed a genome organization resembling Grapevine leafroll-associated virus 3, the type species of the gen...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/j.virusres.2013.09.039
更新日期:2013-12-26 00:00:00
abstract::Thogoto (THO) virus infections of Rhipicephalus appendiculatus ticks were examined using tick hosts immune to the virus. In the first set of experiments, ticks were infected by feeding on viraemic hamsters. Inter-stadial infection of THO virus was not affected when ticks ingested a virus-immune bloodmeal but there was...
journal_title:Virus research
pub_type: 杂志文章
doi:10.1016/0168-1702(89)90034-8
更新日期:1989-10-01 00:00:00