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Tatsuya Niwa

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#protein folding Open access Sep 2026

Adaptability of the GroEL/GroES chaperonin to proteostatic challenge revealed by directed evolution.

The folding of newly synthesized proteins is assisted by an essential network of proteins known as molecular chaperones. In bacteria, the chaperones Trigger Factor (TF), DnaK/DnaJ (Hsp70 system), and GroEL/GroES (chaperonin system) are key players in proteostasis maintenance. Here, we further explore the cooperation an...

Marie-Pierre Castanié-Cornet, Tatsuya Niwa, É. Dupuy et al. · 0 citations
#protein folding Sep 2026

Assembly-Pathway Regulation Dictates pH-Responsive Actuation in the R-Body Protein Machinery

Abstract Refractile bodies (R-bodies) are protein assemblies that form intracellular rolls and extend into spirals in response to environmental stimuli. Type 51 R-body assembles from four Reb proteins and undergoes rapid, repeatable ∼50-fold extension. Although R-bodies were described more than 70 years ago, the roles...

Koki Date, Kōsuke Kikuchi, Tatsuya Niwa et al. · 0 citations

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