References of "Kettmann, Richard"
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See detailIn Vitro And In Vivo Oncogenic Potential Of Bovine Leukemia Virus G4 Protein
Kerkhofs, P.; Heremans, H.; Burny, A. et al

in Journal of Virology (1998), 72(3),

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See detailPhosphorylation of bovine leukemia virus Tax protein is required for in vitro transformation but not for transactivation.
Willems, Luc ULg; Grimonpont, Cathy; Kerkhofs, Pierre et al

in Oncogene (1998), 16(17), 2165-76

The Tax proteins of the oncovirinae viruses are phosphorylated transcriptional activators that exhibit oncogenic potential. The role of phosphorylation in their functional activities remains unknown. As a ... [more ▼]

The Tax proteins of the oncovirinae viruses are phosphorylated transcriptional activators that exhibit oncogenic potential. The role of phosphorylation in their functional activities remains unknown. As a model for the Human T-cell leukemia virus type I (HTLV-I), Bovine Leukemia Virus (BLV) permits the characterization of viral replication and leukemogenesis in vivo. Here, we show that the BLV Tax protein is phosphorylated on serine residues 106 and 293 both in insect and in mammalian cells. These sites can also be efficiently phosphorylated by the cdc2 and MAP kinases in vitro. Mutation of these residues does not affect the capacity of the Tax protein to function as a transactivator. Indeed, the Tax proteins mutated at one or both serines increase LTR-directed viral transcription at levels similar to those obtained with wild-type Tax in cell culture. Moreover, inhibition of Tax phosphorylation by W7, a calmodulin antagonist, does not alter its transactivation activity. Thus, phosphorylation on serines 106 and 293 is not required for transactivation by Tax. However, simultaneous substitution of both serines into alanine residues destroys the capacity of Tax to cooperate with the Ha-ras oncogene to transform primary rat embryo fibroblasts and induce tumors in nude mice. When the serines were replaced with aspartic acid residues, the oncogenic potential of Tax was maintained indicating that the negative charge rather than the phosphate group itself was required for Tax oncogenicity. Finally, to assess the role of the serine residues in vivo, recombinant viruses which express the Tax mutants were constructed and injected into sheep. It appeared that the mutated proviruses replicate at levels similar to the wild-type virus in vivo. We conclude that Tax phosphorylation is dispensable for transactivation and viral replication in vivo but is required for its oncogenic potential in vitro. [less ▲]

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See detailConservative Mutations In The Immunosuppressive Region Of The Bovine Leukemia Virus Transmembrane Protein Affect Fusion But Not Infectivity In Vivo
Gatot, Js.; Callebaut, I.; Mornon, Jp. et al

in Journal of Biological Chemistry (1998), 273(21),

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See detailCarbonic Anhydrase Ix, Mn/Ca Ix: Structure, Function And Involvement In Carcinogenesis
Pastorekova, S.; Kaluz, S.; Gibadulinova, A. et al

in Chemical Papers-Chemicke Zvesti (1998), 52

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See detailThe Cloning And Sequencing Of An Ovine C-Myc Cdna
Kiermer, V.; Dequiedt, Franck ULg; Masengo, R. et al

in DNA Sequence : The Journal of DNA Sequencing & Mapping (1997), 7(3-4),

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See detailThe Major Homology Region Of Bovine Leukaemia Virus P24(Gag) Is Required For Virus Infectivity In Vivo
Willems, Luc ULg; Kerkhofs, P.; Attenelle, L. et al

in Journal of General Virology (1997), 78

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See detailPhosphorylation of the Bovine Leukemia Virus transactivator p34Tax is required for transformation but not for transactivation.
Kettmann, Richard ULg; Grimonpont, C.; Kerkhofs, Pierre et al

in FASEB Journal (1997), 11(9), 1179

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See detailMutations in the immunosuppressive peptide of bovine leukema virus affect fusion and infectivity in vivo
Gatot, Jean-Stéphane; Kettmann, Richard ULg; Callebaut-Mornon, Isabelle et al

in Virus Research (1997), 47(2-Special Issue), 103

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See detailPolyclonal Bovine Sera But Not Virus-Neutralizing Monoclonal Antibodies Block Bovine Leukemia Virus (Blv) Gp51 Binding To Recombinant Blv Receptor Blvrcp1
Orlik, O.; Ban, J.; Hlavaty, J. et al

in Journal of Virology (1997), 71(4),

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See detailOncogenic potential of Tax requires phosphorylation on serines 106 et 293.
Willems, Luc ULg; Grimonpont, Catherine; Kerkhofs, Pierre et al

in Virus Research (1997), 47(2 -Special Issue), 121-122

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See detailLack Of Mutation In The Waf1/Cip1 Gene During Bovine Leukemia Virus-Induced Leukemogenesis
Dequiedt, Franck ULg; Willems, Luc ULg; Kerkhofs, P. et al

in Veterinary Immunology and Immunopathology (1997), 59(3-4),

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See detailTAQ1 restriction fragment length polymorphism for pig growth hormone in pigs.
Nicolas, Nathalie; Fumiere, Olivier; Prandi, A. et al

in Proceedings of the 14th IVPS Congress (1996, July)

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See detailIGF-I and IGFBPs in plasma of growing Landrace and large withe pigs.
Messina, M.; Prandi, A.; Nicolas, Nathalie et al

in Proceedings of the 14th IPVS Congress (1996, July)

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See detailModulation Of Cd3-Gamma Gene Expression After Hiv Type 1 Infection Of The We17/10 T Cell Line Is Progressive And Occurs In Concert With Decreased Production Of Viral P24 Antigen
Willardgallo, Ke.; Delmellewibaut, C.; Segurazapata, I. et al

in Aids Research and Human Retroviruses (1996), 12(8),

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See detailCellular Pathways Involved In The Ex Vivo Expression Of Bovine Leukemia Virus
Kerkhofs, P.; Adam, E.; Droogmans, L. et al

in Journal of Virology (1996), 70(4),

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See detailThe Creb, Atf-1, And Atf-2 Transcription Factors From Bovine Leukemia Virus-Infected B Lymphocytes Activate Viral Expression
Adam, E.; Kerkhofs, P.; Mammerickx, M. et al

in Journal of Virology (1996), 70(3),

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See detailAbsence probable de la translocation Robertsonienne 1/29 en race bovine Blanc Bleu Belge
Nicolas, N.; Hidas, A.; Renaville, Robert ULg et al

in Genetics, Selection, Evolution (1995), 27(4), 377-380

The 1/29 translocation, a structural chromosomal abnormality, is often associated with infertility. For this reason, we wished to know its frequency in the Belgian Blue breed. In this study, none of the ... [more ▼]

The 1/29 translocation, a structural chromosomal abnormality, is often associated with infertility. For this reason, we wished to know its frequency in the Belgian Blue breed. In this study, none of the 138 Belgian Blue bulls karyotyped carried the 1/29 translocation. We calculated that the 1/29 translocation frequency in the Belgian Blue breed must be lower than 0.69% at the 5% level. This result can be explained by the origins of the breed. The Belgian Blue breed is descended from focal dairy breeds and from the Shorthorn breed, which can all be considered to be free of the 1/29 translocation. [less ▲]

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See detailLack of LTR and ENV genetic variation during bovine leukemia virus-induced leukemogenesis.
Willems, Luc ULg; Kerkhofs, P.; Burny, A. et al

in Virology (1995), 206(1),

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See detailRat embryo fibroblasts immortalization by bovine leukemia virus Tax protein
Willems, Luc ULg; Heremans, H.; Burny, A. et al

in Methods in Cell Science : An Official Journal of the Society for in Vitro Biology (1995)

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