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Rational design of elastin-like polypeptide fusion proteins to tune self-assembly and properties of protein vesicles.
Li, Yirui; Dautel, Dylan R; Gray, Mikaela A; McKenna, Michael E; Champion, Julie A.
Afiliação
  • Li Y; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA. julie.champion@chbe.gatech.edu.
  • Dautel DR; BioEngineering Program, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA.
  • Gray MA; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA. julie.champion@chbe.gatech.edu.
  • McKenna ME; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA. julie.champion@chbe.gatech.edu.
  • Champion JA; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA. julie.champion@chbe.gatech.edu.
J Mater Chem B ; 11(27): 6443-6452, 2023 07 12.
Article em En | MEDLINE | ID: mdl-37357544
ABSTRACT
Protein vesicles made from bioactive proteins have potential value in drug delivery, biocatalysis, and as artificial cells. As the proteins are produced recombinantly, the ability to precisely tune the protein sequence provides control not possible with polymeric vesicles. The tunability and biocompatibility motivated this work to develop protein vesicles using rationally designed protein building blocks to investigate how protein sequence influences vesicle self-assembly and properties. We have reported an elastin-like polypeptide (ELP) fused to an arginine-rich leucine zipper (ZR) and functional, globular proteins fused to a glutamate-rich leucine zipper (ZE) that self-assemble into protein vesicles when warmed from 4 to 25 °C due to the hydrophobic transition of ELP. Previously, we demonstrated the ability to tune vesicle properties by changing protein and salt concentration, ZE ZR ratio, and warming rate. However, there is a limit to the properties that can be achieved via assembly conditions. In order to access a wider range of vesicle diameter and stability profiles, this work investigated how modifiying the hydrophobicity and length of the ELP sequence influenced self-assembly and the final properties of protein vesicles using mCherry as a model globular protein. The results showed that both transition temperature and diameter of protein vesicles were inversely correlated to the ELP guest residue hydrophobicity and the number of ELP pentapeptide repeats. Additionally, sequence manipulation enabled assembly of vesicles with properties not accessible by changes to assembly conditions. For example, introduction of tyrosine at 5 guest residue positions in ELP enabled formation of nanoscale vesicles stable at physiological salt concentration. This work yields design guidelines for modifying the ELP sequence to manipulate protein vesicle transition temperature, size and stability to achieve desired properties for particular biofunctional applications.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Peptídeos / Elastina Idioma: En Revista: J Mater Chem B Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Peptídeos / Elastina Idioma: En Revista: J Mater Chem B Ano de publicação: 2023 Tipo de documento: Article