Design of novel granulopoietic proteins by topological rescaffolding

Author:

Hernandez Alvarez BirteORCID,Skokowa JuliaORCID,Coles MurrayORCID,Mir PerihanORCID,Nasri Masoud,Maksymenko Kateryna,Weidmann LauraORCID,Rogers Katherine W.ORCID,Welte Karl,Lupas Andrei N.ORCID,Müller PatrickORCID,ElGamacy Mohammad

Abstract

Computational protein design is rapidly becoming more powerful, and improving the accuracy of computational methods would greatly streamline protein engineering by eliminating the need for empirical optimization in the laboratory. In this work, we set out to design novel granulopoietic agents using a rescaffolding strategy with the goal of achieving simpler and more stable proteins. All of the 4 experimentally tested designs were folded, monomeric, and stable, while the 2 determined structures agreed with the design models within less than 2.5 Å. Despite the lack of significant topological or sequence similarity to their natural granulopoietic counterpart, 2 designs bound to the granulocyte colony-stimulating factor (G-CSF) receptor and exhibited potent, but delayed, in vitro proliferative activity in a G-CSF-dependent cell line. Interestingly, the designs also induced proliferation and differentiation of primary human hematopoietic stem cells into mature granulocytes, highlighting the utility of our approach to develop highly active therapeutic leads purely based on computational design.

Funder

Max-Planck-Gesellschaft

Madeleine Schickedanz-KinderKrebs-Stiftung

BMBF

DFG

Publisher

Public Library of Science (PLoS)

Subject

General Agricultural and Biological Sciences,General Immunology and Microbiology,General Biochemistry, Genetics and Molecular Biology,General Neuroscience

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