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All life is regulated by the reversible phosphorylation of proteins. The phosphorylation state of a protein determines its biochemical properties and biological functions and is regulated by the opposing catalytic forces of protein kinases and phosphatases. In this tug-of-war the role of the phosphatases has been neglected for a long time due to the misconception of phosphatases being promiscuous, non-specific enzymes that only set the stage for kinases. The reason for that resided in a lack of knowledge on the complex nature of these enzymes. With the growing knowledge on phosphatases their equal importance for many biological processes became clear. A major phosphoserine/-threonine phosphatase in the cell is protein phosphatase 2A (PP2A). PP2A stands for a large multisubunit holoenzyme family, each of which fulfills its own substrate specific tasks. We are trying to answer how the biogenesis of PP2A holoenzymes is regulated and what the substrates of PP2A holoenzymes are.
We study PP2A biogenesis in yeast and mammals using biochemical, genetic and immunological approaches. Key tools for our analysis are monoclonal antibodies with exquisite specificity. We generated the worldwide first and still unique antibody recognizing the PP2A carboxy-terminal methylation, a modification of the catalytic subunit essential for the assembly of PP2A holoenzymes with tumor-suppressive functions. Our analysis in yeast unraveled some of the basic principles of PP2A biogenesis and laid the foundation to the present PP2A biogenesis model. Despite the high degree of conservation much less is known about this process in higher eukaryotes. We generated a conditional knockout mouse of the PP2A chaperone PTPA and are analyzing the knockout phenotype on a molecular level. Detailed knowledge on mammalian PP2A biogenesis is required for novel therapeutic strategies such as SMAPs, recently developed drugs that restore the tumor-suppressive function of PP2A.
Egon Ogris studied medicine at the University of Vienna and obtained his MD in 1987. From 1992-1995 Egon was a postdoctoral fellow at the Dana-Farber Cancer Institute/Harvard Medical School in Boston. In 1995 he started his own group at the University of Vienna (now Medical University of Vienna), where he habilitated in 2000.
Two new papers from our lab now show that several antibodies recognizing the enzyme PP2A, and an antibody widely used in a technique called Myc tagging lack the precision for their intended tasks. The findings published in “Science Signaling” show that this and other Myc tag antibodies yield inconsistent results depending on the molecular surrounding of the tag, and that antibodies recognizing PP2A often prove to be unsuitable for measuring the activity of this enzyme.
Read the abstracts:
We have uncovered the function of PTPA as a PP2A activation chaperone. This activation step is coupled to the interaction with the structural PP2A subunit and is under surveillance of the PP2A methylesterase. Methylation of the PP2A catalytic subunit is an essential requirement for the assembly of trimeric holoenzymes.
The transient interaction between PP2A and its substrates cannot be detected by standard methods, which is the major reason for the lack of knowledge on the “true in vivo” substrates of PP2A. In collaboration with the Ammerer lab we developed a protein proximity assay termed M-TRACK, which makes it possible to detect and analyze such short-lived PPIs in vivo.
We generate monoclonal antibodies for research and diagnosis, offer a monoclonal antibody service and develop novel approaches to improve antibody specificity. Examples are antibodies specific for lamin A/C point-mutants to study laminopathies, for apolipoprotein E4 for Alzheimer’s risk assessment and the anti-BLUE/anti-RAINBOW antibodies for the western blot detection of protein markers.
David Drescher
+43-1-4277-61704
Room: 2.127
Selective PP2A Enhancement through Biased Heterotrimer Stabilization.
Leonard, Daniel; Huang, Wei; Izadmehr, Sudeh; O'Connor, Caitlin M; Wiredja, Danica D; Wang, Zhizhi; Zaware, Nilesh; Chen, Yinghua; Schlatzer, Daniela M; Kiselar, Janna; Vasireddi, Nikhil; Schüchner, Stefan; Perl, Abbey L; Galsky, Matthew D; Xu, Wenqing; Brautigan, David L; Ogris, Egon; Taylor, Derek J; Narla, Goutham
PP2AC Phospho-Tyr307 Antibodies Are Not Specific for this Modification but Are Sensitive to Other PP2AC Modifications Including Leu309 Methylation.
Frohner, Ingrid E; Mudrak, Ingrid; Schüchner, Stefan; Anrather, Dorothea; Hartl, Markus; Sontag, Jean-Marie; Sontag, Estelle; Wadzinski, Brian E; Preglej, Teresa; Ellmeier, Wilfried; Ogris, Egon
Antibodies recognizing the C terminus of PP2A catalytic subunit are unsuitable for evaluating PP2A activity and holoenzyme composition.
Frohner, Ingrid E; Mudrak, Ingrid; Kronlachner, Stephanie; Schüchner, Stefan; Ogris, Egon
The Myc tag monoclonal antibody 9E10 displays highly variable epitope recognition dependent on neighboring sequence context.
Schüchner, Stefan; Behm, Christian; Mudrak, Ingrid; Ogris, Egon
Ca2+-dependent demethylation of phosphatase PP2Ac promotes glucose deprivation-induced cell death independently of inhibiting glycolysis.
Lee, Ha Yin; Itahana, Yoko; Schuechner, Stefan; Fukuda, Masahiro; Je, H Shawn; Ogris, Egon; Virshup, David M; Itahana, Koji
The Group Ogris participates in the special Doctoral Program "Molecular Mechanisms of Cell Signaling" reviewed and funded by the Austrian Research Fund FWF.
Monday Seminar (Internal)
Speaker: WU Shuangyang (Dolan), SCARAMUZZA Federico (Tessmar), KROGULL Daniel (Burga)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
The recently discovered ties between teeth and infants in human evolution
Speaker: Leslea HluskoInstitute: CENIEHHost: Nicole Grunstra
Characterisation of Vpr1, a novel protein involved in DSB repair
Speaker: Mustafa AlaaboInstitute: Dept. Chromosome Biology, Univ. ViennaHost: Franz Klein
Probing multi-scale dynamics in complex fluids and biological systems with differential dynamic microscopy
Speaker: Roberto CerbinoInstitute: University of ViennaHost: Arthur Sedivy
Marine symbioses fueled by wood
Speaker: Dan DistelInstitute: Ocean Genome Legacy CenterHost: Jillian Petersen
New insights in gene regulation and chromatin folding by enhancers and cohesin
Speaker: Wouter de LaatInstitute: Hubrecht InstituteHost: Christa Bücker
Genetic approaches in human cells to expose 'hidden' biology
Speaker: Thijn BrummelkampInstitute: NKI / Oncode InstituteHost: Johannes Zuber
Molecular mechanism analysis involved in mitochondrial sheath formation and spermiation processes using gene-manipulated mice
Speaker: Keisuke ShimadaInstitute: Research Institute for Microbial Diseases, Osaka UniversityHost: Andrea Pauli
Monday Seminar (Internal)
Speaker: JELENIC Stela (Saha), ABDRAKHMANOV Alibek (Dagdas), GALUSKA Philipp (Djinovic)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Exploiting a unique post-translational modification to enhance subunit selection and activity of a tumor suppressor complex
Speaker: Derek TaylorInstitute: Departments of Pharmacology and Biochemistry,Case Western Reserve University, Cleveland OHIOHost: Thomas Leonard and Egon Ogris
From non-coding RNAs to non-canonical Mutations in Cancer
Speaker: Sven DiederichsInstitute: DKFZHost: Julius Brennecke
Chemical tools to study nucleic acids by biophysical methods
Speaker: Christoph KreutzInstitute: University of InnsbruckHost: Georg Kontaxis
Microbial trait-based scaling from single populations to communities with consequences for ecosystem processes
Speaker: Ashish MalikInstitute: University of AberdeenHost: Andreas Richter
How chromosome architecture shapes brain architecture
Speaker: Daniele CanzioInstitute: UCSFHost: Anton Goloborodko
Monday Seminar (Internal)
Speaker: MAYER Rupert (Proteomics Tech Hub), WILLIAMS Thomas (Clausen), GEISMANN Maximilian (Balzarotti)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Comprehensive and quantitative characterization of aneuploidy phenotypes
Speaker: Manuela Sophie KollerInstitute: Dept. Chromosome Biology, Univ. ViennaHost: Chris Campbell
Cellular crosstalk in Neurodevelopmental Disorders
Speaker: Silvia CappelloInstitute: MPI of Psychiatry MunichHost: Jürgen Knoblich
Top down and bottom up exploration of human gut microbial communities
Speaker: Karoline FaustInstitute: KU LeuvenHost: Lucia Fuchslueger
Title to be announced
Speaker: Chris OostenbrinkInstitute: BOKU WienHost: Kristina Djinovic-Carugo
Monday Seminar (Internal)
Speaker: PACHECO FIALLOS Franics Belen (Plaschka), FONTES OLIVEIRA Tiago Manuel (Penninger)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
The Mirage of Biosocial Complexity: Critique and Collaboration Around the Tools of Epigenetics
Speaker: Luca ChiapperinoInstitute: Institute of Social Sciences (ISS), University of LausanneHost: Vienna Open Lab
Monday Seminar (Internal)
Speaker: KHALDIEH Nina (Ameres), LORENZO ORTS Laura (Pauli), ROSS James (Burga)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Samer HattarInstitute: NIHHost: Kristin Tessmar
Monday Seminar (Internal)
Speaker: RAFFL Gerald (Ameres), SAJTOS Bettina (Zuber), LANGER Christoph (Gerlich)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Anshul KundajeInstitute: Stanford UniversityHost: Alex Stark
Monday Seminar (Internal)
Speaker: STEINACKER Thomas (Gerlich), EDER Stephanie (Zimmer), TIKANOVA Polina (Burga)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: SCHELLHAAS Ulla (Plaschka/Ameres), RUSCH Emma (Goloborodko), VULIN Milica (Obenauf)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: RADHAKRISHNA PILLAI Balashankar (Saha), MIGOTTI Mario (Konrat), RÖHNSER Josef (Pauli)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: BELL Caelan (Gerlich), MEREITER Stefan (Penninger), BINDL Michael (Leeb)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: LORBEER Franziska (Stark), MULVEY Hugh (Dolan), PÜHRINGER Florian (Burga)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: HOLZER Elisabeth (Martens), COLOZZA Gabriele (Koo), FALCON CHAVEZ Francisco (Tanaka)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: BLAHA Andreas (Pauli), OKUN Anastasia (Karagöz), JUNG Pauline (Obenauf)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Sir Philip CohenInstitute: University of DundeeHost: Egon Ogris
Monday Seminar (Internal)
Speaker: LICHT-MAYER Simon (Penninger), CAYGILL Samuel (Dolan), ADELMANN Leonie (Raible)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Feng ShaoInstitute: National Institute of Biological Sciences, BeijingHost: Pavel Kovarik
Monday Seminar (Internal)
Speaker: SHUNMUGAM Dhanlakshmi (Baccarini), CECI GINISTRELLI Lavinia (Mendjan), VORLÄNDER Matthias (Plaschka)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Jan LöweInstitute: MRC Laboratory of Molecular BiologyHost: Jan-Michael Peters
Monday Seminar (Internal)
Speaker: KOK Jian Yi (Berger), GROH Roan (Dagdas), SODERHOLM Adrian (Versteeg)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Stephan GruberInstitute: University of LausanneHost: Franz Klein
Title to be announced
Speaker: Lydia FinleyInstitute: Memorial Sloan Kettering Cancer CenterHost: Johannes Zuber
Monday Seminar (Internal)
Speaker: STRAVS Ana (Knoblich), SANCHEZ DE MEDINA HERNANDEZ Victor (Dagdas), HORENKAMP Simone (Tanaka)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: PROTELL I DE MONTSERRAT Julia (Brennecke/Plaschka), NAGUMO WONG Sakurako (Knoblich), CORIC Aida (Tessmar)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Nancy KlecknerInstitute: Harvard UniversityHost: Franz Klein
Title to be announced
Speaker: Vera Gorbunova and Andrei SeluanovInstitute: University of RochesterHost: EDI group at GMI/IMBA/IMP
Monday Seminar (Internal)
Speaker: GRABARCZYK Daniel (Clausen), TAVERINI Katherina (Urban), MANCHENO JUNCOSA Estela (Mendjan)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Edward LemkeInstitute: IMB MainzHost: David Haselbach
Monday Seminar (Internal)
Speaker: ATTRILL Sarah (Dolan), UIJTTEWAAL Esther (Elling), SCIBISZ Grzegorz (Karagöz)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: DOLESCHALL Balint (Knoblich), FENG Sonjie (Bücker), BOURGUET Pierre (Berger)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Rotem SorekInstitute: Weizmann Institute of Science, RehovotHost: Julius Brennecke
Monday Seminar (Internal)
Speaker: KRUMWIEDE Luisa (Gaidt), KAPRAL Thomas (Zagrovic)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: KOBAKHIDZE George (Dong), ANGELOPOULOU Eleni (Ellis), PACHANO Tomas (Stark)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Stephan GrillInstitute: MPI of Molecular Cell Biology and GeneticsHost: Clemens Plaschka
Monday Seminar (Internal)
Speaker: RAMIREZ America (Köhler), VÖLKL Isabella (Bücker), HOANG Oi Pui (Technau)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Mounia LaghaInstitute: Institut de Genetique Moleculaire de MontpellierHost: Andrea Pauli
Monday Seminar (Internal)
Speaker: LEITNER Moritz (Martinez), VOGEL Alexander (Yudushkin), KETTEL Paulina (Karagöz)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Martin HetzerInstitute: IST AustriaHost: Jürgen Knoblich
Monday Seminar (Internal)
Speaker: TSAREV Aleksandr (Ameres), FIESELER Charlie (Zimmer), ABESAMIS Kim Ivan (Dong)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Laurent NguyenInstitute: University of LiegeHost: Noelia Urban
Monday Seminar (Internal)
Speaker: HEIDARI KHOEI Heidar (Rivron), KLEIFELD Justus (Urban), ORLIC Lucija (Matos)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Ian HicksonInstitute: University of CopenhagenHost: Joao Matos
Monday Seminar (Internal)
Speaker: SHULKINA Alexandra (Versteeg), GEETHA Sowmya (Jantsch), MADHUSUDHANAN Jalaja (Zimmer)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: KOLLER Manuela (Campbell), GUPTA Ankit (Goloborodko), SCHMÖLLERL Johannes (Zuber)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: MARCHIORI Elisa (Van der Veeken), ACHLEITNER Anja (Martens), FAAS Victoria (Clausen)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: SALEWSKIJ Kirill (Penninger), KIRCHGATTERER Paul (Gaidt), REN Kaike (Otsuka)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: MIHAILOVIC Milica (Karagöz), BELL Lillie (Clausen), TELONI Federico (Gerlich)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: STANKUNAS Edvinas (Köhler), LEV Itamar (Zimmer)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: OBERHUEMER Michael (Leeb), GONAZLEZ ALVARADO Maria (Grade), SCHOLZ Julia (Otsuka)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: AMANN Sascha (Haselbach), KASHKO Nataliia (Matos), BAUER Bernd (Martens)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: LEE Joonsun (Elling), LEYVA GONZALEZ Marco (Tanaka), MILIVOJEV Nadja (Raible)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: GAO Peng (Dagdas), GOGOVA Rebeca (Clausen), PAVLOVA Anzhela (Matos)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: AYALA MUNOZ Farja (Plaschka), VETRANO Pamela (Ramundo), YU Changwei (Brennecke)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: KONSTANTINOU Andri (Obenauf), NAVA GARCIA Marintia (Dagdas), WOLFF Uyen Le Phuong (Jantsch V.)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: HARTMANN Felix (Matos), PASSERA Alessandro (Balzarotti), SANCHEZ BURGOS Laura (Obenauf)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: SILVA Raquel (Foisner), HODAKOVA Zuzana (Haselbach), MYLARSHCHIKOV Dmitry (Gerlich)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Title to be announced
Speaker: Johannes WalterInstitute: Harvard Medical SchoolHost: Jan-Michael Peters
Monday Seminar (Internal)
Speaker: PIECH Lucas (Leonard), DE LA CONCEPCION Juan Carlos (Dagdas), POPOVA Mariia (Peters)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: GALLI Lucrezia (Tanaka), DIAS Ana Beatriz (Slade), TAKACS Zsuzsanna (Gerlich)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: KNIEST Judith (Haselbach), KELLNER Max (Penninger), BABADEI Olga (Decker)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: BOHAUMILITZKY Lena (Pinheiro), RAIDERS Stephan (Tanaka), PRLESI Ines (Gerlich)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: ZHAN Ni (Dagdas), PITASI Mattia (Leeb), HEINZL Monika (Stark)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: VELETI Lalitha (Pauli), ENGL Magdalena (Slade), NAAS Julia (Van Haeseler)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: FARAWAY Rupert (Plaschka), GRUNDMANN Lorenz (Haselbach), KLEINWAECHTER Ava (Slade)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: RÖTZER Johannes (Dolan), MIOCIC-STOSIC Fran (Zagrovic), RITSCHKA Birgit (Tanaka)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: PUSHPA BOSE Greeshma (Urban), RAINA Shiviya (Dammermann)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: COUTURIER Jeanne (Jachowicz), PABST Gabriel (Zuber), ROFFAY Chloe (Pinheiro)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: RUSSETT Colleen (Berger), NAJM Ramsey (Knoblich), HOLLAUS David (Gaidt)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: SHARMA Sanskriti (Ellis), JANKOWSKA Julia (Ameres), PAPAREDDY Ranjith (Dagdas)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: MAURER Eric (Peters), BHARDWAJ Vishakha (Schlögelhofer), DIEZMA Laura (Nordborg/Mari-Ordonez)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: GUZMAN PEREZ Sebastian (Martinez), LITTLEBOY Jamie (Knoblich), RIABOV Daria (Plaschka)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: ZEILER Christina (Kovarik), DOCAVO GARCIA Antonio (Jachowicz), Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: ZMAJKOVIC Jakub (Zuber), DEL CHIARO Alessia (Dagdas), ANTONIOLI Sumire (Leonard)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: HUETTER Christiane (Menche), KRACHT Laura (Knoblich), SANDRU Ana Maria (Baccarini)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: BENEDUM Johannes (Slade), KALIS Robert (Zuber), PATEL Rajvi (Matos)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs
Monday Seminar (Internal)
Speaker: PROTSENKO Liudmila (Brennecke), SHETTY Kavya (Hein), BASSAT Elad (Tanaka)Institute: Open only to IMP/IMBA/GMI/Max Perutz Labs