Prof. Dr. Isabel Roditi

Regulation and function of surface glycoproteins of Trypanosomes

We are interested to understand how trypanosomes sense their environment and how they regulate gene expression in order to adapt to different hosts, with particular emphasis on genes coding for stage-specific coat proteins. Many other organisms regulate expression primarily at the level of the promoter. In contrast, trypanosomes typically employ multiple levels of post-transcriptional control. We are using several approaches, including biochemical purification of RNA-binding complexes and genome-wide screens with RNAi libraries, to identify novel proteins that regulate stage-specific gene expression. One of our aims is to identify classes of mRNAs that are coordinately regulated by specific ribonucleoprotein complexes and to decipher the sequence and structural motifs that determine binding..

Gruppe Roditi

Staff Scientists

Post Docs

PhD students

Master students


Number of items: 36.

Journal Article

Roditi, Isabel (2016). The languages of parasite communication. Molecular and biochemical parasitology, 208(1), pp. 16-22. Elsevier 10.1016/j.molbiopara.2016.05.008

Roditi, Isabel; Schumann-Burkard, Gabriela; Naguleswaran, Arunasalam (2016). Environmental sensing by African trypanosomes. Current opinion in microbiology, 32, pp. 26-30. Current Biology Ltd. 10.1016/j.mib.2016.04.011

Imhof, Simon; Fragoso, Cristina; Hemphill, Andrew; Von Schubert, Conrad; Li, Dong; Legant, Wesley; Betzig, Erik; Roditi, Isabel (2016). Flagellar membrane fusion and protein exchange in trypanosomes; a new form of cell-cell communication? F1000Research, 5(682), p. 682. F1000 Research Ltd 10.12688/f1000research.8249.1

Wenzler, Tanja; Schumann-Burkard, Gabriela; Schmidt, Remo S.; Mäser, Pascal; Bergner, Andreas; Roditi, Isabel; Brun, Reto (2016). A new approach to chemotherapy: drug-induced differentiation kills African trypanosomes. Scientific Reports, 6(22451), p. 22451. Nature Publishing Group 10.1038/srep22451

Imhof, Simon; Roditi, Isabel (2015). The Social Life of African Trypanosomes. Trends in parasitology, 31(10), pp. 490-498. Elsevier Current Trends 10.1016/

Vanwalleghem, G; Fontaine, F; Lecordier, L; Tebabi, P; Klewe, K; Nolan, DP; Yamaryo-Botté, Y; Botté, C; Schumann-Burkard, Gabriela; Rassow, J; Roditi, Isabel; Perez-Morga, D; Pays, E (2015). Coupling of lysosomal and mitochondrial membrane permeabilization in trypanolysis by APOL1. Nature communications, 6(8078), p. 8078. Nature Publishing Group 10.1038/ncomms9078

de Macêdo, Juan P.; Schumann-Burkard, Gabriela; Niemann, Moritz; Barrett, Michael P.; Vial, Henri; Mäser, Pascal; Roditi, Isabel; Schneider, André; Bütikofer, Peter; Horn, David (2015). An Atypical Mitochondrial Carrier That Mediates Drug Action in Trypanosoma brucei. PLoS pathogens, 11(5), e1004875. Public Library of Science 10.1371/journal.ppat.1004875

Naguleswaran, Arunasalam; Gunasekera, Kapila; Schimanski, Bernd; Heller, Manfred; Hemphill, Andrew; Ochsenreiter, Torsten; Roditi, Isabel (2015). Trypanosoma brucei RRM1 is a nuclear RNA-binding protein and modulator of chromatin structure. mBio, 6(2), e00114. American Society for Microbiology 10.1128/mBio.00114-15

Imhof, Simon; Vu Nguyen, Xuan Lan; Bütikofer, Peter; Roditi, Isabel (2015). A glycosylation mutant of Trypanosoma brucei links social motility defects in vitro to impaired colonisation of tsetse in vivo. Eukaryotic cell, 14(6), pp. 588-592. American Society for Microbiology ASM 10.1128/EC.00023-15

Bühlmann, M; Walrad, Pegine; Rico, E; Ivens, A; Capewell, P; Naguleswaran, Arunasalam; Roditi, Isabel; Matthews, K (2015). NMD3 regulates both mRNA and rRNA nuclear export in African trypanosomes via an XPOI-linked pathway. Nucleic acids research, 43(9), pp. 4491-4504. Information Retrieval Ltd. 10.1093/nar/gkv330

Cristodero, Marina; Schimanski, Bernd; Heller, Manfred; Roditi, Isabel (2014). Functional characterization of the trypanosome translational repressor SCD6. Biochemical journal, 457(1), pp. 57-67. Portland Press 10.1042/BJ20130747

Lecordier, Laurence; Uzureau, P; Tebabi, P; Perez-Morga, D; Nolan, D; Schumann-Burkard, Gabriela; Roditi, Isabel; Pays, E (2014). Identification of Trypanosoma brucei components involved in trypanolysis by normal human serum. Molecular microbiology, 94(3), pp. 625-636. Blackwell Science 10.1111/mmi.12783

Imhof, Simon; Knüsel, Sebastian; Gunasekera, Kapila; Vu Nguyen, Xuan Lan; Roditi, Isabel (2014). Social motility of African trypanosomes is a property of a distinct life-cycle stage that occurs early in tsetse fly transmission. PLoS pathogens, 10(10), e1004493. Public Library of Science 10.1371/journal.ppat.1004493

Knüsel, Sebastian; Roditi, Isabel (2013). Insights into the regulation of GPEET procyclin during differentiation from early to late procyclic forms of Trypanosoma brucei. Molecular and biochemical parasitology, 191(2), pp. 66-74. Elsevier 10.1016/j.molbiopara.2013.09.004

Schumann Burkard, Gabriela; Käser, Sandro; de Araújo, Patricia; Schimanski, Bernd; Naguleswaran, Arunasalam; Knüsel, Sebastian; Heller, Manfred; Roditi, Isabel (2013). Nucleolar proteins regulate stage-specific gene expression and ribosomal RNA maturation in Trypanosoma brucei. Molecular microbiology, 88(4), pp. 827-840. Blackwell Science 10.1111/mmi.12227

Morand, Sabine; Renggli, Christina Kunz; Roditi, Isabel; Vassella, Erik (2012). MAP kinase kinase 1 (MKK1) is essential for transmission of Trypanosoma brucei by Glossina morsitans. Molecular and biochemical parasitology, 186(1), pp. 73-6. Amsterdam: Elsevier 10.1016/j.molbiopara.2012.09.001

Schumann Burkard, Gabriela; Jutzi, Pascal; Roditi, Isabel (2011). Genome-wide RNAi screens in bloodstream form trypanosomes identify drug transporters. Molecular and biochemical parasitology, 175(1), pp. 91-94. Amsterdam: Elsevier 10.1016/j.molbiopara.2010.09.002

Mani, Jan; Güttinger, Andreas; Schimanski, Bernd; Heller, Manfred; Acosta-Serrano, Alvaro; Pescher, Pascale; Späth, Gerald; Roditi, Isabel (2011). Alba-domain proteins of Trypanosoma brucei are cytoplasmic RNA-binding proteins that interact with the translation machinery. PLoS ONE, 6(7), e22463. Lawrence, Kans.: Public Library of Science 10.1371/journal.pone.0022463

Aeby, Eric; Ullu, Elisabetta; Yepiskoposyan, Hasmik; Schimanski, Bernd; Roditi, Isabel; Mühlemann, Oliver; Schneider, André (2010). tRNASec is transcribed by RNA polymerase II in Trypanosoma brucei but not in humans. Nucleic acids research, 38(17), pp. 5833-5843. London: Information Retrieval Ltd. 10.1093/nar/gkq345

Nilsson, Daniel; Gunasekera, Kapila; Mani, Jan; Osteras, Magne; Farinelli, Laurent; Baerlocher, Loic; Roditi, Isabel; Ochsenreiter, Torsten (2010). Spliced leader trapping reveals widespread alternative splicing patterns in the highly dynamic transcriptome of Trypanosoma brucei. PLoS pathogens, 6(8), e1001037. San Francisco, Calif.: Public Library of Science 10.1371/journal.ppat.1001037

Oberle, Michael; Balmer, Oliver; Brun, Reto; Roditi, Isabel (2010). Bottlenecks and the maintenance of minor genotypes during the life cycle of Trypanosoma brucei. PLoS pathogens, 6(7), e1001023. San Francisco, Calif.: Public Library of Science 10.1371/journal.ppat.1001023

Vassella, Erik; Oberle, Michael; Urwyler, Simon; Renggli, Christina Kunz; Studer, Erwin; Hemphill, Andrew; Fragoso, Cristina; Bütikofer, Peter; Brun, Reto; Roditi, Isabel (2009). Major surface glycoproteins of insect forms of Trypanosoma brucei are not essential for cyclical transmission by tsetse. PLoS ONE, 4(2), e4493. Lawrence, Kans.: Public Library of Science 10.1371/journal.pone.0004493

Rufener, Lucien; Mäser, Pascal; Roditi, Isabel; Kaminsky, Ronald (2009). Haemonchus contortus acetylcholine receptors of the DEG-3 subfamily and their role in sensitivity to monepantel. PLoS pathogens, 5(4), e1000380. San Francisco, Calif.: Public Library of Science 10.1371/journal.ppat.1000380

Fragoso, Cristina M.; Schumann Burkard, Gabriela; Oberle, Michael; Kunz Renggli, Christina; Hilzinger, Karen; Roditi, Isabel (2009). PSSA-2, a Membrane-Spanning Phosphoprotein of Trypanosoma brucei, Is Required for Efficient Maturation of Infection. PLoS ONE, 4(9), e7074. Lawrence, Kans.: Public Library of Science 10.1371/journal.pone.0007074

Haenni, Simon; Studer, Erwin; Schumann Burkard, Gabriela; Roditi, Isabel (2009). Bidirectional silencing of RNA polymerase I transcription by a strand switch region in Trypanosoma brucei. Nucleic acids research, 37(15), pp. 5007-5018. London: Information Retrieval Ltd. 10.1093/nar/gkp513

Goldshmidt, Hanoch; Sheiner, Lilach; Bütikofer, Peter; Roditi, Isabel; Uliel, Shai; Günzel, Mark; Engstler, Markus; Michaeli, Shulamit (2008). Role of protein translocation pathways across the endoplasmic reticulum in Trypanosoma brucei. Journal of biological chemistry, 283(46), pp. 32085-32098. Bethesda, Md.: American Society for Biochemistry and Molecular Biology 10.1074/jbc.M801499200

Roditi, Isabel; Lehane, Michael (2008). Interactions between trypanosomes and tsetse flies. Current opinion in microbiology, 11(4), pp. 345-351. London: Current Biology Ltd. 10.1016/j.mib.2008.06.006

Güttinger, Andreas; Schwab, Claudia; Morand, Sabine; Roditi, Isabel; Vassella, Erik (2007). A mitogen-activated protein kinase of Trypanosoma brucei confers resistance to temperature stress. Molecular and biochemical parasitology, 153(2), pp. 203-206. Amsterdam: Elsevier 10.1016/j.molbiopara.2007.02.001

Burkard, Gabriela; Fragoso, Cristina; Roditi, Isabel (2007). Highly efficient stable transformation of bloodstream forms of Trypanosoma brucei. Molecular and biochemical parasitology, 153(2), pp. 220-223. Amsterdam: Elsevier 10.1016/j.molbiopara.2007.02.008

Spoerri, Iris; Chadwick, Ruth; Renggli, Christina; Matthews, Keith; Roditi, Isabel; Burkard, Gabriela (2007). Role of the stage-regulated nucleoside transporter TbNT10 in differentiation and adenosine uptake in Trypanosoma brucei. Molecular and biochemical parasitology, 154(1), pp. 110-4. Amsterdam: Elsevier 10.1016/j.molbiopara.2007.04.006

Urwyler, Simon; Studer, Erwin; Renggli, Christina; Roditi, Isabel (2007). A family of stage-specific alanine-rich proteins on the surface of epimastigote forms of Trypanosoma brucei. Molecular microbiology, 63(1), pp. 218-28. Oxford: Blackwell Science 10.1111/j.1365-2958.2006.05492.x

Domenicali Pfister, Debora; Burkard, Gabriela; Morand, Sabine; Renggli, Christina Kunz; Roditi, Isabel; Vassella, Erik (2006). A Mitogen-activated protein kinase controls differentiation of bloodstream forms of Trypanosoma brucei. Eukaryotic cell, 5(7), pp. 1126-35. Washington, D.C.: American Society for Microbiology ASM 10.1128/EC.00094-06

Utz, Silvia; Roditi, Isabel; Kunz Renggli, Christina; Almeida, Igor C; Acosta-Serrano, Alvaro; Bütikofer, Peter (2006). Trypanosoma congolense procyclins: unmasking cryptic major surface glycoproteins in procyclic forms. Eukaryotic cell, 5(8), pp. 1430-40. Washington, D.C.: American Society for Microbiology ASM 10.1128/EC.00067-06

Haenni, Simon; Kunz Renggli, Christina; Fragoso, Cristina; Oberle, Michael; Roditi, Isabel (2006). The procyclin-associated genes of Trypanosoma brucei are not essential for cyclical transmission by tsetse. Molecular and biochemical parasitology, 150(2), pp. 144-156. Amsterdam: Elsevier 10.1016/j.molbiopara.2006.07.005

Urwyler, Simon; Vassella, Erik; Abbeele, Jan Van Den; Kunz Renggli, Christina; Blundell, Pat; Barry, J. David; Roditi, Isabel (2005). Expression of Procyclin mRNAs during Cyclical Transmission of Trypanosoma brucei. PLoS pathogens, 1(3), e22. Public Library of Science 10.1371/journal.ppat.0010022

Weynants, V; Gilson, D; Furger, A; Collins, R A; Mertens, P; De Bolle, X; Heussler, Volker; Roditi, Isabel; Howard, C J; Dobbelaere, A E; Letesson, J J (1998). Production and characterisation of monoclonal antibodies specific for bovine interleukin-4. Veterinary immunology and immunopathology, 66(2), pp. 99-112. Elsevier 10.1016/S0165-2427(98)00184-6

This list was generated on Sun Apr 23 13:01:15 2017 CEST.