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Contributions of the C-terminal domain to poly(A)-specific ribonuclease (PARN) stability and self-association
Poly(A)-specific ribonuclease (PARN) catalyzes the degradation of mRNA poly(A) tail to regulate translation efficiency and mRNA decay in higher eukaryotic cells. The full-length PARN is a multi-domain protein containing the catalytic nuclease domain, the R3H domain, the RRM domain and the C-terminal...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6430076/ https://www.ncbi.nlm.nih.gov/pubmed/30949591 http://dx.doi.org/10.1016/j.bbrep.2019.100626 |
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author | He, Guang-Jun Yan, Yong-Bin |
author_facet | He, Guang-Jun Yan, Yong-Bin |
author_sort | He, Guang-Jun |
collection | PubMed |
description | Poly(A)-specific ribonuclease (PARN) catalyzes the degradation of mRNA poly(A) tail to regulate translation efficiency and mRNA decay in higher eukaryotic cells. The full-length PARN is a multi-domain protein containing the catalytic nuclease domain, the R3H domain, the RRM domain and the C-terminal intrinsically unstructured domain (CTD). The roles of the three well-structured RNA-binding domains have been extensively studied, while little is known about CTD. In this research, the impact of CTD on PARN stability and aggregatory potency was studied by comparing the thermal inactivation and denaturation behaviors of full-length PARN with two N-terminal fragments lacking CTD. Our results showed that K(+) induced additional regular secondary structures and enhanced PARN stability against heat-induced inactivation, unfolding and aggregation. CTD prevented PARN from thermal inactivation but promoted thermal aggregation to initiate at a temperature much lower than that required for inactivation and unfolding. Blue-shift of Trp fluorescence during thermal transitions suggested that heat treatment induced rearrangements of domain organizations. CTD amplified the stabilizing effect of K(+), implying the roles of CTD was mainly achieved by electrostatic interactions. These results suggested that CTD might dynamically interact with the main body of the molecule and release of CTD promoted self-association via electrostatic interactions. |
format | Online Article Text |
id | pubmed-6430076 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-64300762019-04-04 Contributions of the C-terminal domain to poly(A)-specific ribonuclease (PARN) stability and self-association He, Guang-Jun Yan, Yong-Bin Biochem Biophys Rep Research Article Poly(A)-specific ribonuclease (PARN) catalyzes the degradation of mRNA poly(A) tail to regulate translation efficiency and mRNA decay in higher eukaryotic cells. The full-length PARN is a multi-domain protein containing the catalytic nuclease domain, the R3H domain, the RRM domain and the C-terminal intrinsically unstructured domain (CTD). The roles of the three well-structured RNA-binding domains have been extensively studied, while little is known about CTD. In this research, the impact of CTD on PARN stability and aggregatory potency was studied by comparing the thermal inactivation and denaturation behaviors of full-length PARN with two N-terminal fragments lacking CTD. Our results showed that K(+) induced additional regular secondary structures and enhanced PARN stability against heat-induced inactivation, unfolding and aggregation. CTD prevented PARN from thermal inactivation but promoted thermal aggregation to initiate at a temperature much lower than that required for inactivation and unfolding. Blue-shift of Trp fluorescence during thermal transitions suggested that heat treatment induced rearrangements of domain organizations. CTD amplified the stabilizing effect of K(+), implying the roles of CTD was mainly achieved by electrostatic interactions. These results suggested that CTD might dynamically interact with the main body of the molecule and release of CTD promoted self-association via electrostatic interactions. Elsevier 2019-03-19 /pmc/articles/PMC6430076/ /pubmed/30949591 http://dx.doi.org/10.1016/j.bbrep.2019.100626 Text en © 2019 The Authors. Published by Elsevier B.V. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Research Article He, Guang-Jun Yan, Yong-Bin Contributions of the C-terminal domain to poly(A)-specific ribonuclease (PARN) stability and self-association |
title | Contributions of the C-terminal domain to poly(A)-specific ribonuclease (PARN) stability and self-association |
title_full | Contributions of the C-terminal domain to poly(A)-specific ribonuclease (PARN) stability and self-association |
title_fullStr | Contributions of the C-terminal domain to poly(A)-specific ribonuclease (PARN) stability and self-association |
title_full_unstemmed | Contributions of the C-terminal domain to poly(A)-specific ribonuclease (PARN) stability and self-association |
title_short | Contributions of the C-terminal domain to poly(A)-specific ribonuclease (PARN) stability and self-association |
title_sort | contributions of the c-terminal domain to poly(a)-specific ribonuclease (parn) stability and self-association |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6430076/ https://www.ncbi.nlm.nih.gov/pubmed/30949591 http://dx.doi.org/10.1016/j.bbrep.2019.100626 |
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