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In vitro selection of anti-Akt2 thioether-macrocyclic peptides leading to isoform-selective inhibitors.

Abstract：

:The Akt kinase family, consisting of three isoforms in humans, is a well-validated class of drug target. Through various screening campaigns in academics and pharmaceutical industries, several promising inhibitors have been developed to date. However, due to the mechanistic and structural similarities of Akt kinases, it is yet a challenging task to discover selective inhibitors against a specific Akt isoform. We here report Akt-selective and also Akt2 isoform-selective inhibitors based on a thioether-macrocyclic peptide scaffold. Several anti-Akt2 peptides have been selected from a library by means of an in vitro display system, referred to as the RaPID (Random nonstandard Peptide Integrated Discovery) system. Remarkably, the majority of these "binding-active" anti-Akt2 peptides turned out to be "inhibitory active", exhibiting IC(50) values of approximately 100 nM. Moreover, these peptides are not only selective to the Akt kinase family but also isoform-selective to Akt2. Particularly, one referred to as Pakti-L1 is able to discriminate Akt2 250- and 40-fold over Akt1 and Akt3, respectively. This proof-of-concept case study suggests that the RaPID system has a tremendous potential for the discovery of unique inhibitors with high family- and isoform-selectivity.

journal_name

ACS Chem Biol

journal_title

ACS chemical biology

authors

Hayashi Y,Morimoto J,Suga H

doi

10.1021/cb200388k

subject

Has Abstract

pub_date

2012-03-16 00:00:00

pages

607-13

issue

3

eissn

1554-8929

issn

1554-8937

journal_volume

7

pub_type

杂志文章

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