Abstract:
:Human cytomegalovirus (HCMV) glycoprotein US2 increases the proteasome-mediated degradation of major histocompatibility complex (MHC) class I heavy chain (HC), class II DR-alpha and DM-alpha proteins, and HFE, a nonclassical MHC protein. US2-initiated degradation of MHC proteins apparently involves the recruitment of cellular proteins that participate in a process known as endoplasmic reticulum (ER)-associated degradation. ER-associated degradation is a normal process by which misfolded proteins are recognized and translocated into the cytoplasm for degradation by proteasomes. It has been demonstrated that truncated forms of US2, especially those lacking the cytoplasmic domain (CT), can bind MHC proteins but do not cause their degradation. To further assess how the US2 CT domain interacts with the cellular components of the ER-associated degradation pathway, we constructed chimeric proteins in which the US2 CT domain or the CT and transmembrane (TM) domains replaced those of the HCMV glycoprotein US3. US3 also binds both class I and II proteins but does not cause their degradation. Remarkably, chimeras containing the US2 CT domain caused the degradation of both MHC class I and II proteins although this degradation was less than that by wild-type US2. Therefore, the US2 CT and TM domains can confer on US3 the capacity to degrade MHC proteins. We also analyzed complexes containing MHC proteins and US2, US3, US11, or US3/US2 chimeras for the presence of cdc48/p97 ATPase, a protein that binds polyubiquitinated proteins and likely functions in the extraction of substrates from the ER membrane before the substrates meet proteasomes. p97 ATPase was present in immunoprecipitates containing US2, US11, and two chimeras that included the US2 CT domain, but not in US3 complexes. Therefore, it appears that the CT domain of US2 participates in recruiting p97 ATPase into ER-associated degradation complexes.
journal_name
J Viroljournal_title
Journal of virologyauthors
Chevalier MS,Johnson DCdoi
10.1128/jvi.77.8.4731-4738.2003subject
Has Abstractpub_date
2003-04-01 00:00:00pages
4731-8issue
8eissn
0022-538Xissn
1098-5514journal_volume
77pub_type
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.74.19.9317-9321.2000
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abstract::The molecular defect in the nonconditional B-tropic MuLV pol mutant, clone 23 (Gerwin et al., J. Virol. 31:741-751, 1979), has been characterized by recombinant DNA technology. The entire mutant genome was cloned from an EcoRI digest of integrated cellular DNA into bacteriophage lambda Charon 4A and then subcloned at ...
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pub_type: 杂志文章
doi:10.1128/JVI.51.2.470-478.1984
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.62.8.2531-2536.1988
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.1.57-64.1998
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.6.2798-2812.1989
更新日期:1989-06-01 00:00:00
abstract::Recent clinical trials examining 3'-azido-3'-deoxythymidine (AZT, zidovudine, or Retrovir) combined with L-2', 3'-dideoxy-3'-thiacytidine (3TC or lamivudine) have shown that combination therapy with these nucleoside analogs affords significant virological and clinical benefits. The addition of 3TC to AZT delays AZT re...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.72.6.5093-5098.1998
更新日期:1998-06-01 00:00:00
abstract::Recently developed antiviral strategies based upon RNA interference (RNAi), which harnesses an innate cellular system for the targeted down-regulation of gene expression, appear highly promising and offer alternative approaches to conventional highly active antiretroviral therapy or efforts to develop an AIDS vaccine....
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.68.10.6684-6689.1994
更新日期:1994-10-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.37.2.628-635.1981
更新日期:1981-02-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00727-10
更新日期:2010-09-01 00:00:00
abstract::A number of human immunodeficiency type 1 (HIV-1)-based vectors have recently been shown to transduce nondividing cells in vivo as well as in vitro. However, if these vectors are to be considered for eventual clinical use, a major consideration is to reduce the probability of unintended generation of replication-compe...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.3.1828-1834.1999
更新日期:1999-03-01 00:00:00
abstract::The influenza A virus nucleoprotein (NP) is a single-stranded RNA-binding protein that encapsidates the virus genome and has essential functions in viral-RNA synthesis. Here, we report the characterization of a temperature-sensitive (ts) NP mutant (US3) originally generated in fowl plague virus (A/chicken/Rostock/34)....
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01424-08
更新日期:2009-01-01 00:00:00
abstract::To investigate E7-dependent biochemical changes which are involved in cellular transformation, we analyzed the influence of human papillomavirus type 16 (HPV-16) E7 on the expression of cell cycle regulatory proteins. Expression of E7 in established rodent fibroblasts (NIH 3T3), which was shown to be sufficient for tr...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.69.10.6389-6399.1995
更新日期:1995-10-01 00:00:00
abstract::A hydrophilic region consisting of strikingly clustered charged amino acids is present at the center of human immunodeficiency virus type 1 (HIV-1) Vif. In this study, the role for this central hydrophilic region (E(88)WRKKR(93)) in the virus replication in nonpermissive H9 cells was investigated by extensive deletion...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.77.2.1626-1632.2003
更新日期:2003-01-01 00:00:00
abstract::The hepatitis A virus (HAV) internal ribosome entry segment (IRES) is unique among the picornavirus IRESs in that it is inactive in the presence of either the entero- and rhinovirus 2A or aphthovirus Lb proteinases. Since these proteinases both cleave eukaryotic initiation factor 4G (eIF4G) and HAV IRES activity could...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/jvi.75.17.7864-7871.2001
更新日期:2001-09-01 00:00:00
abstract::Human T-cell leukemia virus type 1 (HTLV-1) is the etiologic agent of the aggressive and fatal disease adult T-cell leukemia. Previous studies have demonstrated that the HTLV-1-encoded Tax protein inhibits the function of tumor suppressor p53 through a Tax-induced NF-kappaB pathway. Given these attributes, we were int...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.00690-08
更新日期:2008-09-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.6.2521-2526.1989
更新日期:1989-06-01 00:00:00
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pub_type: 杂志文章
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更新日期:2011-06-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.20.3.621-626.1976
更新日期:1976-12-01 00:00:00
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journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.18.1.48-57.1976
更新日期:1976-04-01 00:00:00
abstract::Apoptosis of neurons and astrocytes is induced by human immunodeficiency type 1 (HIV-1) infection in vitro and has been demonstrated in brain tissue from patients with AIDS. We analyzed a panel of diverse HIV-1 primary isolates for the ability to replicate and induce neuronal and astrocyte apoptosis in primary human b...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.73.2.897-906.1999
更新日期:1999-02-01 00:00:00
abstract::We describe a modification of the polymerase chain reaction technique which allows amplification of cellular DNA adjacent to an integrated provirus given sequence information for the provirus only. The modified technique should be generally useful for studies of insertional mutagenesis and other situations in which on...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.5.1924-1928.1989
更新日期:1989-05-01 00:00:00
abstract::Recruitment and extravasation of T cells through the blood-brain barrier are favored by adhesion molecule-mediated interactions of circulating T cells with endothelial cells. Since a common pathological finding in human T-cell leukemia virus type 1 (HTLV-1)-associated diseases is the infiltration of HTLV-1-infected T ...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.71.11.8522-8530.1997
更新日期:1997-11-01 00:00:00
abstract::Infection of the chestnut blight fungus Cryphonectria parasitica with Cryphonectria hypovirus 1 (CHV1) causes disruption of virulence, pigmentation, and sporulation. Transcriptional downregulation of key developmentally regulated fungal genes occurs during infection, but vegetative growth is unaffected. Previous studi...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.05756-11
更新日期:2012-06-01 00:00:00
abstract::Nucleotide sequence analysis of two simian virus 40 early mutants dl1263 and dl1265, which lack a DNA segment around map positions 0.21 and 0.18, respectively (C. Cole, T. Landers, S. Goff, S. MAnteuil-Brutlag, and P. Berg, J. Virol. 24:277--294, 1977), revealed in-phase deletions of 33 nucleotide pairs for dl1263 and...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.30.3.936-941.1979
更新日期:1979-06-01 00:00:00
abstract::The replication of vaccinia virus is thought to take place exclusively in the cytoplasm of host cells. However, using DNA-DNA hybridization techniques, it can be shown that a significant fraction of the synthesis of vaccinia DNA takes place in the nucleus as well as the cytoplasm. The (3H) thymiding pulse-labeled vacc...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.15.2.305-315.1975
更新日期:1975-02-01 00:00:00
abstract::Synthesis of the fiber protein of human adenovirus serotype 2 (Ad2) is 100-fold lower in abortively infected monkey cells, compared with productive infections, despite only a 5- to 10-fold reduction in fiber mRNA levels. Previously Anderson and Klessig (Proc. Natl. Acad Sci. USA 81:4023-4027, 1984) demonstrated a dire...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.63.10.4376-4385.1989
更新日期:1989-10-01 00:00:00
abstract::A retrovirus endogenous to guinea pig cells was earlier shown to be morphologically similar to type B and type D prototype retroviruses. Molecular hybridization techniques were used to show that guinea pig virus nucleotide sequences are endogenous to both domestic (Cavia porcellus) and indigenous (Cavia aperea) guinea...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.33.1.522-530.1980
更新日期:1980-01-01 00:00:00
abstract::The importance of neutralizing antibodies (NAbs) in protection against hepatitis C virus (HCV) remains controversial. We infused a chimpanzee with H06 immunoglobulin from a genotype 1a HCV-infected patient and challenged with genotype strains efficiently neutralized by H06 in vitro. Genotype 1a NAbs afforded no protec...
journal_title:Journal of virology
pub_type: 杂志文章
doi:10.1128/JVI.01194-15
更新日期:2015-09-01 00:00:00