The dedicated chaperones of eL43, Puf6 and Loc1 can also bind RPL43 mRNA and regulate the production of this ribosomal protein
Journal
Journal of Biochemistry
Journal Volume
171
Journal Volume
171
Journal Issue
1
Journal Issue
1
Pages
85-96
Start Page
85
End Page
96
ISSN
0021924X
Date Issued
2022-01-01
Author(s)
Abstract
The level of ribosome biogenesis is highly associated with cell growth rate. Because many ribosomal proteins have extraribosomal functions, overexpression or insufficient supply of these proteins may impair cellular growth. Therefore, the supply of ribosomal proteins is tightly controlled in response to rRNA syntheses and environmental stimuli. In our previous study, two RNA-binding proteins, Puf6 and Loc1, were identified as dedicated chaperones of the ribosomal protein eL43, with which they associate to maintain its protein level and proper loading. In this study, we demonstrate that Puf6 and Loc1 interact with RPL43 mRNA. Notably, Puf6 and Loc1 usually function as a dimeric complex to bind other mRNAs; however, in this instance, the individual proteins, but not the complex form, can bind RPL43 mRNA. Thus, Puf6 or Loc1 could bind RPL43 mRNA in loc1Δor puf6Δ, respectively. The binding of Puf6 or Loc1 caused negative effects for eL43 production: decreased RNA stability and translation of RPL43A/B mRNA. The present results suggest that these dedicated chaperones control the protein levels of eL43 from the standpoint of stability and through regulating its production.
Subjects
chaperone
post-transcriptional regulation
ribosome biogenesis
RNA binding proteins
trans-acting factors
SDGs
Publisher
Oxford University Press
Type
journal article