Search results for "IE1"

showing 2 items of 2 documents

Identification of a Conserved HLA-A2-Restricted Decapeptide from the IE1 Protein (pUL123) of Human Cytomegalovirus

2002

Abstract Control of human cytomegalovirus (HCMV) infection is predominantly mediated by cytolytic CD8 + T lymphocytes (CTL). Among the roughly 200 HCMV-encoded polypeptides, the tegument protein pp65 (ppUL83) and the nonstructural IE1 protein are considered to be dominant CTL targets. Yet the importance of CTL against IE1 for protective immunity against HCMV reactivation and disease has remained elusive. Analyses have been difficult, as all MHC class I presented peptides of IE1 defined so far are located in parts of the protein that are variable between viral strains. In this study a conserved decameric peptide from IE1 (P6, IE1 354–363 ) that bound to HLA-A2 was identified. Using peptide-p…

Human cytomegalovirusherpesvirusesViral proteinvirusesMolecular Sequence DataIE1CytomegalovirusEpitopes T-Lymphocytecytotoxic T lymphocytesmedicine.disease_causeImmediate early proteinCell LineImmediate-Early ProteinsViral Proteinsconserved CTL epitopesVirologyHLA-A2 AntigenMHC class ImedicineHumansCytotoxic T cellAmino Acid SequenceConserved SequencebiologyELISPOTvirus diseasesHLA-A2biochemical phenomena metabolism and nutritionCytotoxicity Tests Immunologicmedicine.diseaseVirologyPeptide FragmentsVirus LatencyCTL*human cytomegalovirusCytomegalovirus InfectionsImmunologybiology.proteinPeptidesCD8T-Lymphocytes CytotoxicVirology
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Immune evasion proteins gpUS2 and gpUS11 of human cytomegalovirus incompletely protect infected cells from CD8 T cell recognition

2009

AbstractHuman cytomegalovirus (HCMV) encodes four glycoproteins, termed gpUS2, gpUS3, gpUS6 and gpUS11 that interfere with MHC class I biosynthesis and antigen presentation. Despite gpUS2–11 expression, however, HCMV infection is efficiently controlled by cytolytic CD8 T lymphocytes (CTL). To address the role of gpUS2 and gpUS11 in antigen presentation during viral infection, HCMV mutants were generated that expressed either gpUS2 or gpUS11 alone without coexpression of the three other proteins. Fibroblasts infected with these viruses showed reduced HLA-A2 and HLA-B7 surface expression. Surprisingly, however, CTL directed against the tegument protein pp65 and the regulatory IE1 protein stil…

Human cytomegalovirusvirusesAntigen presentationIE1CytomegalovirusCD8-Positive T-LymphocytesVirus ReplicationMajor histocompatibility complexpp65US2Immediate-Early ProteinsViral Matrix ProteinsHLA-B7 AntigenInterferon-gammaViral ProteinsImmune systemViral Envelope ProteinsVirologyHLA-A2 AntigenMHC class ImedicineHumansCytotoxic T cellCells CulturedAntigen PresentationbiologyImmune evasionRNA-Binding Proteinsvirus diseasesbiochemical phenomena metabolism and nutritionPhosphoproteinsmedicine.diseaseVirologyCTL*MutagenesisCTLCytomegalovirus InfectionsMHC class Ibiology.proteinUS11CD8Virology
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