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Cited by 311

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Structural Features of the GroEL-GroES Nano-Cage Required for Rapid Folding of Encapsulated Protein

Open access
Tang, Yun-Chi, Chang, Hung-Chun, Roeben, Annette, Wischnewski, Dirk, Wischnewski, Nadine, Kerner, Michael J., Hartl, F. Ulrich, Hayer-Hartl, Manajit·2006·Cell

Abstract

GroEL and GroES form a chaperonin nano-cage for proteins up to approximately 60 kDa to fold in isolation. Here we explored the structural features of the chaperonin cage critical for rapid folding of encapsulated substrates. Modulating the volume of the GroEL central cavity affected folding speed in accordance with confinement theory. Small proteins (approximately 30 kDa) folded more rapidly as the size of the cage was gradually reduced to a point where restriction in space slowed folding dramatically. For larger proteins (approximately 40-50 kDa), either expanding or reducing cage volume decelerated folding. Additionally, interactions with the C-terminal, mildly hydrophobic Gly-Gly-Met repeat sequences of GroEL protruding into the cavity, and repulsion effects from the negatively charged cavity wall were required for rapid folding of some proteins. We suggest that by combining these features, the chaperonin cage provides a physical environment optimized to catalyze the structural annealing of proteins with kinetically complex folding pathways.

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Crossref · 10.1016/j.cell.2006.04.027

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Metadata

Authors
Tang, Y.-C., Chang, H.-C., Roeben, A., Wischnewski, D., Wischnewski, N., Kerner, M. J., Hartl, F. U., & Hayer-Hartl, M.
Venue
Cell
Publisher
Elsevier BV
Published
2006-06
Volume
125
Issue
5
Pages
903-914
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2107370157
Cited by
311
References
4
FWCI
9.33
Type
journal article
Language
en
Open access
hybrid

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