Die AG Cabrele

Forschungsthemen

biological targets

 

biological targets

We are interested in the inhibitors of DNA binding and cell differentiation Id1-4 belonging to the family of the helix-loop-helix (HLH) transcription factors. They are important during development, cell fate and lineage determination, neurogenesis and angiogenesis. Also, upregulated Id-protein expression has been observed in several cancer types and has been associated to tumor angiogenesis, migration and invasion. Therefore, the Id proteins can be considered interesting therapeutic targets.

 

DNA transcription

 

Further, in collaboration with colleagues from the University of Padova (Italy) and the University of Regensburg (Germany), we are working on the development of analogs of the natural peptide hormones PTH and NPY with selective agonistic/antagonistic binding to their G-protein coupled receptors (PTH-R1 and the NPY Y-receptors, respectively).

 

Selected publications:

Synthesis and Conformational Properties of Protein Fragments Based on the Id Family of DNA-Binding and Cell-Differentiation Inhibitors, S. Kiewitz, C. Cabrele (2005) Biopolymers (Peptide Sci.) 80, 762-774.

Synthesis and Conformational Analysis of Id2 Protein Fragments: Impact of Chain Length and Point Mutations on the Structural HLH Motif, N. Colombo, C. Cabrele (2006) J. Peptide Sci. 12, 550-558.

Stepwise Solid-Phase-Synthesis and Spontaneous Homodimerization of the Helix-Loop-Helix Protein Id3, J. Svobodová, C. Cabrele (2006) ChemBioChem 7, 1164-1168.

Synthesis and Conformation of an Analog of the Helix-Loop-Helix Domain of the Id1 Protein Containing the O-Acyl Iso-Prolyl-Seryl Switch Motif, M. Beißwenger, T. Yoshiya, Y. Kiso, C. Cabrele, (2010) J. Peptide Sci. 16, 303-308.

Wenn Proteine ihren Partner wechseln (When proteins chainge their partner), C. Cabrele (2011) BIOSpektrum (Spektrum Akademischer Verlag) 1, 12.

G protein-coupled receptors function as logic gates for nanoparticle binding and cell uptake, W. Hild, K. Pollinger, A. Caporale, C. Cabrele, M. Keller, N. Pluym, A. Buschauer, R. Rachel, J. Tessmar, M. Breunig, A. Goepferich, (2010) Proc. Natl. Acad. Sci. USA 107, 10667-10672.

 

 

chemical protein synthesis

We use the chemical approach to prepare polypeptides reproducing the native or modified sequences of the Id proteins (119 up to 165 residues) and other biological targets. Most of our syntheses are carried out on the solid phase by applying Fmoc-chemistry.

 

Chemical protein synthesis

 

Selected publications:

Synthesis and Conformational Analysis of Id2 Protein Fragments: Impact of Chain Length and Point Mutations on the Structural HLH Motif, N. Colombo, C. Cabrele (2006) J. Peptide Sci. 12, 550-558.

Stepwise Solid-Phase-Synthesis and Spontaneous Homodimerization of the Helix-Loop-Helix Protein Id3, J. Svobodová, C. Cabrele (2006) ChemBioChem 7, 1164-1168.

 

 

PEptide-based drugs                                                                                      

Bioactive peptides are powerful scaffolds for the development of new therapeutic agents. However, it is essential to overcome some drawbacks associated to their low metabolic stability and bioavailability. We are interested in the development of chemically modified bioactive peptides, in order to provide them of proteolytic stability and target specificity. Suitable chemical tools are, among others, unnatural, conformationally restricted amino acids, and macrocyclizations.

Peptide-based drugs

 

Selected publications:

Side-Chain Cyclization Based on Serine Residues: Synthesis, Structure and Activity of a Novel Cyclic Analogue of the Parathyroid Hormone Fragment 1-11, A. Caporale, M. Sturlese, L. Gesiot, F. Zanta, A. Wittelsberger, C. Cabrele, (2010) J. Med. Chem. 53, 8072-8079.

 

 

peptide/protein association and solvation

Many proteins exert their action by interacting with specific protein targets and forming active complexes that initiate a signal cascade. Also the Id proteins negatively modulate DNA transcription by sequestering basic-HLH transcription factors in heterodimers that are devoid of the ability to bind the DNA. The Id-HLH domain is essential for protein-protein interaction, thus representing an interesting target for molecular recognition by means of artificial agents to modulate the Id-protein activity. We use two different approaches to target the Id-HLH dimerization domain: (a) identification of peptide-based ligands and (b) application of artificial receptors for amino-acid side-chain recognition (collaboration with Prof. B. König at the University of Regensburg).

The conformation of a protein depends not only on its primary structure, but also on extrinsic factors such as temperature, ionic strength, pH and hydrophobicity of the solvent. Due to their biological relevance and to their application in different fields spreading from drug formulation to bionanotechnology, it is worthwhile to investigate the behavior of proteins upon environmental changes. Based on the use of peptide models, we are interested in the elucidation of the interplay between different secondary structure motifs and surrounding molecules from the solvent and other additives (collaboration within the Excellence Cluster RESOLV of the Ruhr-University Bochum). 

Logo Uni Bochum

Selected publications:

Recognition of the Helix-Loop-Helix Domain of the ld Proteins by an Artificial Luminescent Metal Complex Receptor, S. D. Kiewitz, M. Kruppa, A. Riechers, B. König, C. Cabrele (2008) J. Mol. Recognit. 21, 79-88.

Synthetic Peptides Containing a Conserved Sequence Motif of the Id Protein Family Modulate Vascular Smooth Muscle Cell Phenotype, S. Pellegrino, N. Ferri, N. Colombo, E. Cremona, A. Corsini, R. Fanelli, M. L. Gelmi, C. Cabrele (2009) Bioorg. Med. Chem. Lett. 19, 6298-6302.

How Ionic Liquids Can Help to Stabilize Native Proteins, H. Weingärtner, C. Cabrele, C. Herrmann (2011) Phys. Chem. Chem. Phys. 14, 415-426.

 

 

smart polymers (collaboration with prof. g. ciardelli)

We collaborate with Prof. Gianluca Ciardelli (Politecnico di Torino, Italy) to develop chemical methods for the functionalization of polyurethanes with bioactive amino-acid sequences, aiming at the preparation of biodegradable polymers mimicking the properties of the extracellular matrix. Moreover, we collaborate in the structural characterization of biomimetic polymers for biomedical applications.

  

Selected publications:

Biomimetic Soluble Collagen Purified from Bones, A. M. Ferreira, P. Gentile, S. Sartori, C. Pagliano, C. Cabrele, V. Chiono, G. Ciardelli (2012) Biotechnol. J. doi: 10.1002/biot.201200184.

 

  • News
    45 Teilnehmer und 15 Vortragende aus aller Welt diskutieren derzeit im Rahmen des 20. Jubiläumssommerkurses der Salzburg Law School on International Criminal Law, Humanitarian Law and Human Rights Law aktuelle Probleme des Völkerstrafrechts.
    Dr. Christina Straub hält am 24. August 2018 um 11:00 Uhr im Hörsaal 421 der NW-Fakultät einen Gastvortrag zum Thema "Ecological genetics of resident Pseudomonas syringae on kiwifruit". Der Fachbereich Biowissenschaften lädt herzlich dazu ein!
    Montag 20.08., 12:30-15:00, Unipark Salzburg, Georg-Eisler-Saal
    Der Angst als Grundgefühl der Gegenwart, deren pathologischer Ausformung zu widerstehen sei, waren die Salzburger Hochschulwochen 2018 gewidmet.
    Wer gut schläft, lernt besser. Das hat jetzt eine Langzeitstudie an Schülern bestätigt. Konkret haben Salzburger Schlafforscher um Kerstin Hödlmoser in einem 8-Jahres-Vergleich herausgefunden, dass für das Festigen von Informationen im Schlaf ein ganz bestimmtes Hirnstrommuster eine Schlüsselrolle spielt.
    Am Samstag, den 22. September 2018 ab 11 Uhr stellt der Botanische Garten die Bilder der Künstlerin Karin Wimmeder aus. Nur bei Schönwetter, Ersatztermin: Samstag, 29. September 2018, 11 Uhr. Musikalisch untermalt von der Rhythmusgruppe "Schlagartig.org".
    Von 31.Juli bis 31. August 2018 zeigt das Literaturarchiv Salzburg die Ausstellung "Raus aus der Stadt! Hofmannsthal und das Junge Wien auf Sommerfrische". Dies ist der einzige außerhalb Wiens gezeigte Teil eines vom Ludwig Boltzmann Institut für Geschichte und Theorie der Biographie initiierten Ensembles von Ausstellungen mit dem Titel „Das Junge Wien. Natur plus X“ zur Autorengruppe Jung-Wien – Hugo von Hofmannsthal, Arthur Schnitzler, Richard Beer-Hofmann, Hermann Bahr und Felix Salten.
    Die 6. Salzburg Summer School findet vom 3. bis 4. September 2018 statt. Zwei Tage lang wird ein umfassendes pädagogisches Sommerfortbildungsprogramm für Lehrkräfte und Lehramtsstudierende aller Schulformen und Unterrichtsfächer angeboten. Anmeldungen sind möglich.
    Vom Hortus Medicus zur Pharmaforschung. Eine Ausstellung des Verbandes Botanischer Gärten 2018
    Am 6. Dezember 2018 finden an der Universität Salzburg die WTZ Training Days zum Thema Kommunikation, Dissemination und Verbreitung in H2020-Projekten statt.
  • Veranstaltungen
  • Alumni Club
  • PRESSE
  • Uni-Shop
  • VERANSTALTUNGSRÄUME
  • STELLENMARKT
  • Facebook-Auftritt der Universität Salzburg Twitter-Auftritt der Universität Salzburg Instagram-Auftritt der Universität Salzburg Flickr-Auftritt der Universität Salzburg Vimeo-Auftritt der Universität Salzburg