A de novo designed coiled coil-based switch regulates the microtubule motor kinesin-1.
Nat Chem Biol
; 20(7): 916-923, 2024 Jul.
Article
em En
| MEDLINE
| ID: mdl-38849529
ABSTRACT
Many enzymes are allosterically regulated via conformational change; however, our ability to manipulate these structural changes and control function is limited. Here we install a conformational switch for allosteric activation into the kinesin-1 microtubule motor in vitro and in cells. Kinesin-1 is a heterotetramer that accesses open active and closed autoinhibited states. The equilibrium between these states centers on a flexible elbow within a complex coiled-coil architecture. We target the elbow to engineer a closed state that can be opened with a de novo designed peptide. The alternative states are modeled computationally and confirmed by biophysical measurements and electron microscopy. In cells, peptide-driven activation increases kinesin transport, demonstrating a primary role for conformational switching in regulating motor activity. The designs are enabled by our understanding of ubiquitous coiled-coil structures, opening possibilities for controlling other protein activities.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Cinesinas
/
Microtúbulos
Limite:
Humans
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article