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Characteristics of Human OAS1 Isoform Proteins

The human OAS1 (hOAS1) gene produces multiple possible isoforms due to alternative splicing events and sequence variation among individuals, some of which affect splicing. The unique C-terminal sequences of the hOAS1 isoforms could differentially affect synthetase activity, protein stability, protei...

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Autores principales: Di, Han, Elbahesh, Husni, Brinton, Margo A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7077331/
https://www.ncbi.nlm.nih.gov/pubmed/32013110
http://dx.doi.org/10.3390/v12020152
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author Di, Han
Elbahesh, Husni
Brinton, Margo A.
author_facet Di, Han
Elbahesh, Husni
Brinton, Margo A.
author_sort Di, Han
collection PubMed
description The human OAS1 (hOAS1) gene produces multiple possible isoforms due to alternative splicing events and sequence variation among individuals, some of which affect splicing. The unique C-terminal sequences of the hOAS1 isoforms could differentially affect synthetase activity, protein stability, protein partner interactions and/or cellular localization. Recombinant p41, p42, p44, p46, p48, p49 and p52 hOAS1 isoform proteins expressed in bacteria were each able to synthesize trimer and higher order 2′-5′ linked oligoadenylates in vitro in response to poly(I:C). The p42, p44, p46, p48 and p52 isoform proteins were each able to induce RNase-mediated rRNA cleavage in response to poly(I:C) when overexpressed in HEK293 cells. The expressed levels of the p42 and p46 isoform proteins were higher than those of the other isoforms, suggesting increased stability in mammalian cells. In a yeast two-hybrid screen, Fibrillin1 (FBN1) was identified as a binding partner for hOAS1 p42 isoform, and Supervillin (SVIL) as a binding partner for the p44 isoform. The p44-SVIL interaction was supported by co-immunoprecipitation data from mammalian cells. The data suggest that the unique C-terminal regions of hOAS1 isoforms may mediate the recruitment of different partners, alternative functional capacities and/or different cellular localization.
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spelling pubmed-70773312020-03-20 Characteristics of Human OAS1 Isoform Proteins Di, Han Elbahesh, Husni Brinton, Margo A. Viruses Article The human OAS1 (hOAS1) gene produces multiple possible isoforms due to alternative splicing events and sequence variation among individuals, some of which affect splicing. The unique C-terminal sequences of the hOAS1 isoforms could differentially affect synthetase activity, protein stability, protein partner interactions and/or cellular localization. Recombinant p41, p42, p44, p46, p48, p49 and p52 hOAS1 isoform proteins expressed in bacteria were each able to synthesize trimer and higher order 2′-5′ linked oligoadenylates in vitro in response to poly(I:C). The p42, p44, p46, p48 and p52 isoform proteins were each able to induce RNase-mediated rRNA cleavage in response to poly(I:C) when overexpressed in HEK293 cells. The expressed levels of the p42 and p46 isoform proteins were higher than those of the other isoforms, suggesting increased stability in mammalian cells. In a yeast two-hybrid screen, Fibrillin1 (FBN1) was identified as a binding partner for hOAS1 p42 isoform, and Supervillin (SVIL) as a binding partner for the p44 isoform. The p44-SVIL interaction was supported by co-immunoprecipitation data from mammalian cells. The data suggest that the unique C-terminal regions of hOAS1 isoforms may mediate the recruitment of different partners, alternative functional capacities and/or different cellular localization. MDPI 2020-01-29 /pmc/articles/PMC7077331/ /pubmed/32013110 http://dx.doi.org/10.3390/v12020152 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Di, Han
Elbahesh, Husni
Brinton, Margo A.
Characteristics of Human OAS1 Isoform Proteins
title Characteristics of Human OAS1 Isoform Proteins
title_full Characteristics of Human OAS1 Isoform Proteins
title_fullStr Characteristics of Human OAS1 Isoform Proteins
title_full_unstemmed Characteristics of Human OAS1 Isoform Proteins
title_short Characteristics of Human OAS1 Isoform Proteins
title_sort characteristics of human oas1 isoform proteins
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7077331/
https://www.ncbi.nlm.nih.gov/pubmed/32013110
http://dx.doi.org/10.3390/v12020152
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