alexa Cyclic Peptides as Modulators of Protein-Protein Intera
ISSN: 2332-0737

Current Synthetic and Systems Biology
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Cyclic Peptides as Modulators of Protein-Protein Interactions

Fabio Kendi Tamaki1 and Helder I Nakaya2*

1The Institute of Medical Sciences, Foresterhill, University of Aberdeen, Aberdeen AB25 2ZD, UK

2School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil

*Corresponding Author:
Helder I Nakaya
School of Pharmaceutical Sciences
University of São Paulo
São Paulo, Brazil
Tel: +55-11-3091-3636
E-mail: [email protected]

Received date: June 22, 2015; Accepted date: June 24, 2015; Published date: June 27, 2015

Citation: Tamaki FK, Nakaya HI (2015) Cyclic Peptides as Modulators of Protein-Protein Interactions. Curr Synthetic Sys Biol 3:e118. doi:10.4172/2332-0737.1000e118

Copyright: © 2015 Tamaki FK, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Biological processes operate through intricate networks comprised of a myriad of interacting molecules. Protein-protein interactions (PPIs) permeate these networks and are able to transmit and integrate the signalling pathways inside the cells in response to physiological and non-physiological conditions (including cellular pathologies as cancer). To assess the role of such interactions, peptidic compounds have been developed aiming to modulate intracellular PPIs. For instance, structural studies demonstrated in humans and roundworms that the α-helical MAML1 polypeptide binds to a groove formed by the PPI between ICN1 and CLS proteins. The ICN1-CLS-MAML ternary complex plays a key role on NOTCH1 signalling pathway by recruiting the transcription machinery and leading to the transcription of oncogenic NOTCH1 target genes. The group of Dr. James E. Bradner (Harvard Medical School) have designed short α-helical peptides based on a fragment of MAML1 that disrupts the PPI ICN1-CLS, repressing the transcription of NOTCH1 target genes in leukemic cells.

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