Janus chaperones: assistance of both RNA- and protein-folding by ribosomal proteins.

TitleJanus chaperones: assistance of both RNA- and protein-folding by ribosomal proteins.
Publication TypeJournal Article
Year of Publication2009
AuthorsKovacs, D., M. Rak√°cs, B. Agoston, K. Lenkey, K. Semrad, R. Schroeder, and P. Tompa
JournalFEBS Lett
Volume583
Issue1
Pagination88-92
Date Published2009 Jan 5
ISSN1873-3468
KeywordsEscherichia coli Proteins, Hot Temperature, Molecular Chaperones, Nucleic Acid Conformation, Protein Folding, Ribosomal Proteins, RNA
Abstract

Ribosomal proteins assist the assembly and increase the stability of ribosomal RNA, without requiring ATP for their action. Some ribosomal proteins are also known to have essential functions outside the ribosome, i.e. promiscuity of functions that appears to correlate with their structural disorder. Here we addressed if certain ribosomal proteins with RNA chaperone activity and with a significant level of disorder also have protein-chaperone activity in vitro. Four proteins of the large subunit of Escherichia coli ribosome, L15, L16, L18 and L19 have been tested in three chaperone assays, in which all of them exhibited potent chaperone activity, commensurable with that of heat shock protein 90 kDa. These observations highlight possible novel aspects of the promiscuous functions of ribosomal proteins outside of the ribosome.

DOI10.1016/j.febslet.2008.11.049
Alternate JournalFEBS Lett.
PubMed ID19071121
Grant List067595 / / Wellcome Trust / United Kingdom