Insights into the anticancer properties of the first antimicrobial peptide from Archaea
Journal article, 2017

Background: The peptide VLL-28, identified in the sequence of an archaeal protein, the transcription factor Stf76 from Sulfolobus islandicus, was previously identified and characterized as an antimicrobial peptide, possessing a broad-spectrum antibacterial activity. Methods: Through a combined approach of NMR and Circular Dichroism spectroscopy, Dynamic Light Scattering, confocal microscopy and cell viability assays, the interaction of VLL-28 with the membranes of both parental and malignant cell lines has been characterized and peptide mechanism of action has been studied. Results: It is here demonstrated that VLL-28 selectively exerts cytotoxic activity against murine and human tumor cells. By means of structural methodologies, VLL-28 interaction with the membranes has been proven and the binding residues have been identified. Confocal microscopy data show that VLL-28 is internalized only into tumor cells. Finally, it is shown that cell death is mainly caused by a time-dependent activation of apoptotic pathways. Conclusions: VLL-28, deriving from the archaeal kingdom, is here found to be endowed with selective cytotoxic activity towards both murine and human cancer cells and consequently can be classified as an ACP.

Archaea

Peptide-membrane interactions

Sulfolobus

Antimicrobial peptide

Anticancer peptide

Author

R. Gaglione

Universita degli Studi di Napoli Federico II

L. Pirone

Consiglo Nazionale Delle Richerche

B. Farina

Advanced Accelerator Applications

Consiglo Nazionale Delle Richerche

Salvatore Fusco

Chalmers, Biology and Biological Engineering, Industrial Biotechnology

G. Smaldone

IRCCS Fondazione SDN

Martina Aulitto

Universita degli Studi di Napoli Federico II

E. Dell'Olmo

Universita degli Studi di Napoli Federico II

E. Roscetto

Med. School University Federico II

A. Del Gatto

Universita degli Studi di Napoli Federico II

Consiglo Nazionale Delle Richerche

R. Fattorusso

Universita degli Studi di Napoli Federico II

University of Campania Luigi Vanvitelli

E. Notomista

Universita degli Studi di Napoli Federico II

L. Zaccaro

Universita degli Studi di Napoli Federico II

Consiglo Nazionale Delle Richerche

A. Arciello

Universita degli Studi di Napoli Federico II

Istituto Nazionale di Biostrutture e Biosistemi

Emilia Pedone

Universita degli Studi di Napoli Federico II

Consiglo Nazionale Delle Richerche

Patrizia Contursi

Universita degli Studi di Napoli Federico II

Biochimica et Biophysica Acta - General Subjects

0304-4165 (ISSN)

Vol. 1861 9 2155-2164

Subject Categories

Biochemistry and Molecular Biology

DOI

10.1016/j.bbagen.2017.06.009

More information

Latest update

9/6/2018 1