A Combined NMR and Computational Approach to Determine the RGDechi-hCit-avb3 Integrin Recognition Mode in Isolated Cell Membranes

Abstract

The critical role of integrins in tumor progressionand metastasis has stimulated intense efforts to identifypharmacological agents that can modulate integrin function.In recent years, avb3 and avb5 integrin antagonists weredemonstrated to be effective in blocking tumor progression.RGDechi-hCit, a chimeric peptide containing a cyclic RGDmotif linked to an echistatin C-terminal fragment, is able torecognize selectively avb3 integrin both in vitro and in vivo.High-resolution molecular details of the selective avb3 recognitionof the peptide are certainly required, nonethelessRGDechi-hCit internalization limited the use of classical incell NMR experiments. To overcome such limitations, weused WM266 isolated cellular membranes to accomplisha detailed NMR interaction study that, combined with a computationalanalysis, provides significant structural insightsinto avb3 molecular recognition by RGDechi-hCit. Remarkably,on the basis of the identified molecular determinants,we design a RGDechi-hCit mutant that is selective for avb5integrin.


Autore Pugliese

Tutti gli autori

  • B. Farina; I. de Paola; L. Russo; D. Capasso;A. Liguoro; A. Del Gatto; M. Saviano; P.V. Pedone;S. Di Gaetano; G. Malgieri; L. Zaccaro; R. Fattorusso

Titolo volume/Rivista

Chemistry - A European Journal


Anno di pubblicazione

2015

ISSN

1521-3765

ISBN

Non Disponibile


Numero di citazioni Wos

Nessuna citazione

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Settori ERC

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Codici ASJC

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