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    • G3BPs tether the TSC complex to lysosomes and suppress mTORC1 signaling 

      Prentzell, Mirja Tamara; Rehbein, Ulrike; Sandoval, Marti Cadena; De Meulemeester, Ann-Sofie; Baumeister, Ralf; Brohée, Laura; Berdel, Bianca; Bockwoldt, Mathias; Carroll, Bernadette; Chowdhury, Suvagata Roy; von Deimling, Andreas; Demetriades, Constantinos; Figlia, Gianluca; de Arauj, Mariana Eca Guimaraes; Heberle, Alexander Martin; Heiland, Ines; Holzwarth, Birgit; Huber, Lukas A; Jaworski, Jacek; Kedra, Magdalena; Kern, Katharina; Kopach, Andrii; Korolchuk, Viktor I; van't Land-Kuper, Ineke; Macias, Matylda; Nellist, Mark; Palm, Wilhelm; Pusch, Stefan; Ramos Pittol, Jose Miguel; Reil, Michèle; Reintjes, Anja; Reuter, Friederike; Sampson, Julian R.; Scheldeman, Chloë; Siekierska, Aleksandra; Stefan, Eduard; Teleman, Aurelio A; Thomas, Laura E; Torres-Quesada, Omar; Trump, Saskia; West, Hannah D; de Witte, Peter; Woltering, Sandra; Yordanov, Teodor E; Zmorzynska, Justyna; Opitz, Christiane A.; Thedieck, Kathrin (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-25)
      Ras GTPase-activating protein-binding proteins 1 and 2 (G3BP1 and G3BP2, respectively) are widely recognized as core components of stress granules (SGs). We report that G3BPs reside at the cytoplasmic surface of lysosomes. They act in a non-redundant manner to anchor the tuberous sclerosis complex (TSC) protein complex to lysosomes and suppress activation of the metabolic master regulator mechanistic ...

    • Tryptophan metabolism is inversely regulated in the tumor and blood of patients with glioblastoma 

      Sharma, Suraj; Heiland, Ines; Panitz, Verena; Koncarevic, Sasa; Sadik, Ahmed; Friedel, Dennis; Bausbacher, Tobias; Trump, Saskia; Farztdinov, Vadim; Schulz, Sandra; Sievers, Philipp; Schmidt, Stefan; Jürgenson, Ina; Jung, Stephan; Kuhn, Karsten; Pflüger, Irada; Wick, Antje; Pfänder, Pauline; Selzer, Stefan; Vollmuth, Philipp; Sahm, Felix; von deimling, Andreas; Hopf, Carsten; Schulz-Knappe, Peter; Pike, Ian; Platten, Michael; Wick, Wolfgang; Opitz, Christiane A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-03)
      Tryptophan (Trp)-catabolic enzymes (TCEs) produce metabolites that activate the aryl hydrocarbon receptor (AHR) and promote tumor progression and immunosuppression in glioblastoma. As therapies targeting TCEs or AHR become available, a better understanding of Trp metabolism is required.<p> <P>Methods: The combination of LC-MS/MS with chemical isobaric labeling enabled the simultaneous quantitative ...

    • Upregulation of tryptophanyl-tRNA synthethase adapts human cancer cells to nutritional stress caused by tryptophan degradation 

      Adam, Isabell; Dewi, Dyah L.; Mooiweer, Joram; Sadik, Ahmed; Mohapatra, Soumya R.; Berdel, Bianca; Keil, Melanie; Sonner, Jana K.; Thedieck, Kathrin; Rose, Adam J.; Platten, Michael; Heiland, Ines; Trump, Saskia; Opitz, Christiane A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-05)
      Tryptophan (Trp) metabolism is an important target in immuno-oncology as it represents a powerful immunosuppressive mechanism hijacked by tumors for protection against immune destruction. However, it remains unclear how tumor cells can proliferate while degrading the essential amino acid Trp. Trp is incorporated into proteins after it is attached to its tRNA by tryptophanyl-tRNA synthestases. As ...