The power of chemoselectivity: Functional protein-conjugates for proteomic and pharmaceutical research


Event details

Date 19.01.2017
Hour 11:0012:30
Speaker Prof. Christian Hackenberger, Humboldt Universität zu Berlin and Leibniz-Institut für Molekulare Pharmakologie (FMP) -  Berlin
Category Conferences - Seminars
Our lab constantly aims to identify new bioorthogonal reactions for the synthesis and modification of functional peptides and proteins. We apply these highly selective organic reactions to study functional consequences of naturally occurring posttranslational protein modifications (PTMs) as well as to generate novel peptide- and protein-conjugates for pharmaceutical and medicinal applications.1
In the first part of this lecture, our recent efforts in the synthesis and analysis of naturally occurring labile PTMs including the synthesis of site-specifically phosphorylated Lys-peptides (pLys) using the Staudinger-phosphite reaction2a as well as phosphorylated Cys-peptides (pCys),2b will be presented.
In the second part of this presentation, I will focus on the cellular delivery of modified functional proteins. Thereby, we employ cyclic cell penetrating peptides (cCPPs) to transport a functional full length protein to the cytosol of living cells as recently demonstrated by the direct delivery of GFP-conjugates.3 For protein modification we use a combined approach of intein expression, bioorthogonal reactions and recently developed enzymatic ligations, called Tub-tag labeling.4 This concept is finally applied to generate site-specifically labelled cell permeable nanobodies, i.e. small antigen binding proteins that remain active within the reductive milieu inside living cells, to interfere with intracellular targets.5
1.  D. Schumacher, C.P.R. Hackenberger, Curr. Opin. Chem. Biol. 2014, 22, 62-69.
2.  a) J. Bertran-Vicente, R.A. Serwa, M. Schümann, P. Schmieder, E. Krause, C.P.R. Hackenberger, J. Am Chem. Soc. 2014, 136(39), 13622-13628; b) J. Bertran-Vicente, M. Penkert, O. Nieto,  M. Schümann, P. Schmieder, E. Krause, C.P.R. Hackenberger, Nature Comm. 2016, 7,12703.
3.  N. Nischan, H.D. Herce, F. Natale, N. Bohlke, N. Budisa, M.C. Cardoso, C.P.R. Hackenberger, Angew. Chem. Int. Ed. 2015, 54(6), 1950-1953.
4.  D. Schumacher, J. Helma, F.A. Mann, G. Pichler, F. Natale, E. Krause, M.C. Cardoso, C.P.R. Hackenberger, H. Leonhardt, Angew. Chem. Int. Ed. 2015, 54(46), 13787-13791.
5 H. Herce, D. Schumacher, F.A. Mann, A. Ludwig, A. Schneider, M. Filies, S. Reinke, C. Cardoso, C.P.R. Hackenberger, submitted.

Practical information

  • General public
  • Free


  • Prof. Beat Fierz        


  • Marie Munoz