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Transcriptome-Wide Identification of Coding and Noncoding RNA-Binding Proteins Defines the Comprehensive RNA Interactome of Leishmania mexicana

Proteomic profiling of RNA-binding proteins in Leishmania is currently limited to polyadenylated mRNA-binding proteins, leaving proteins that interact with nonadenylated RNAs, including noncoding RNAs and pre-mRNAs, unidentified. Using a combination of unbiased orthogonal organic phase separation me...

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Autores principales: Kalesh, Karunakaran, Wei, Wenbin, Mantilla, Brian S., Roumeliotis, Theodoros I., Choudhary, Jyoti, Denny, Paul W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Society for Microbiology 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8826732/
https://www.ncbi.nlm.nih.gov/pubmed/35138191
http://dx.doi.org/10.1128/spectrum.02422-21
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author Kalesh, Karunakaran
Wei, Wenbin
Mantilla, Brian S.
Roumeliotis, Theodoros I.
Choudhary, Jyoti
Denny, Paul W.
author_facet Kalesh, Karunakaran
Wei, Wenbin
Mantilla, Brian S.
Roumeliotis, Theodoros I.
Choudhary, Jyoti
Denny, Paul W.
author_sort Kalesh, Karunakaran
collection PubMed
description Proteomic profiling of RNA-binding proteins in Leishmania is currently limited to polyadenylated mRNA-binding proteins, leaving proteins that interact with nonadenylated RNAs, including noncoding RNAs and pre-mRNAs, unidentified. Using a combination of unbiased orthogonal organic phase separation methodology and tandem mass tag-labeling-based high resolution quantitative proteomic mass spectrometry, we robustly identified 2,417 RNA-binding proteins, including 1289 putative novel non-poly(A)-RNA-binding proteins across the two main Leishmania life cycle stages. Eight out of 20 Leishmania deubiquitinases, including the recently characterized L. mexicana DUB2 with an elaborate RNA-binding protein interactome were exclusively identified in the non-poly(A)-RNA-interactome. Additionally, an increased representation of WD40 repeat domains were observed in the Leishmania non-poly(A)-RNA-interactome, thus uncovering potential involvement of this protein domain in RNA-protein interactions in Leishmania. We also characterize the protein-bound RNAs using RNA-sequencing and show that in addition to protein coding transcripts ncRNAs are also enriched in the protein-RNA interactome. Differential gene expression analysis revealed enrichment of 142 out of 195 total L. mexicana protein kinase genes in the protein-RNA-interactome, suggesting important role of protein-RNA interactions in the regulation of the Leishmania protein kinome. Additionally, we characterize the quantitative changes in RNA-protein interactions in hundreds of Leishmania proteins following inhibition of heat shock protein 90 (Hsp90). Our results show that the Hsp90 inhibition in Leishmania causes widespread disruption of RNA-protein interactions in ribosomal proteins, proteasomal proteins and translation factors in both life cycle stages, suggesting downstream effect of the inhibition on protein synthesis and degradation pathways in Leishmania. This study defines the comprehensive RNA interactome of Leishmania and provides in-depth insight into the widespread involvement of RNA-protein interactions in Leishmania biology. IMPORTANCE Advances in proteomics and mass spectrometry have revealed the mRNA-binding proteins in many eukaryotic organisms, including the protozoan parasites Leishmania spp., the causative agents of leishmaniasis, a major infectious disease in over 90 tropical and subtropical countries. However, in addition to mRNAs, which constitute only 2 to 5% of the total transcripts, many types of non-coding RNAs participate in crucial biological processes. In Leishmania, RNA-binding proteins serve as primary gene regulators. Therefore, transcriptome-wide identification of RNA-binding proteins is necessary for deciphering the distinctive posttranscriptional mechanisms of gene regulation in Leishmania. Using a combination of highly efficient orthogonal organic phase separation method and tandem mass tag-labeling-based quantitative proteomic mass spectrometry, we provide unprecedented comprehensive molecular definition of the total RNA interactome across the two main Leishmania life cycle stages. In addition, we characterize for the first time the quantitative changes in RNA-protein interactions in Leishmania following inhibition of heat shock protein 90, shedding light into hitherto unknown large-scale downstream molecular effect of the protein inhibition in the parasite. This work provides insight into the importance of total RNA-protein interactions in Leishmania, thus significantly expanding our knowledge of the emergence of RNA-protein interactions in Leishmania biology.
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spelling pubmed-88267322022-02-17 Transcriptome-Wide Identification of Coding and Noncoding RNA-Binding Proteins Defines the Comprehensive RNA Interactome of Leishmania mexicana Kalesh, Karunakaran Wei, Wenbin Mantilla, Brian S. Roumeliotis, Theodoros I. Choudhary, Jyoti Denny, Paul W. Microbiol Spectr Research Article Proteomic profiling of RNA-binding proteins in Leishmania is currently limited to polyadenylated mRNA-binding proteins, leaving proteins that interact with nonadenylated RNAs, including noncoding RNAs and pre-mRNAs, unidentified. Using a combination of unbiased orthogonal organic phase separation methodology and tandem mass tag-labeling-based high resolution quantitative proteomic mass spectrometry, we robustly identified 2,417 RNA-binding proteins, including 1289 putative novel non-poly(A)-RNA-binding proteins across the two main Leishmania life cycle stages. Eight out of 20 Leishmania deubiquitinases, including the recently characterized L. mexicana DUB2 with an elaborate RNA-binding protein interactome were exclusively identified in the non-poly(A)-RNA-interactome. Additionally, an increased representation of WD40 repeat domains were observed in the Leishmania non-poly(A)-RNA-interactome, thus uncovering potential involvement of this protein domain in RNA-protein interactions in Leishmania. We also characterize the protein-bound RNAs using RNA-sequencing and show that in addition to protein coding transcripts ncRNAs are also enriched in the protein-RNA interactome. Differential gene expression analysis revealed enrichment of 142 out of 195 total L. mexicana protein kinase genes in the protein-RNA-interactome, suggesting important role of protein-RNA interactions in the regulation of the Leishmania protein kinome. Additionally, we characterize the quantitative changes in RNA-protein interactions in hundreds of Leishmania proteins following inhibition of heat shock protein 90 (Hsp90). Our results show that the Hsp90 inhibition in Leishmania causes widespread disruption of RNA-protein interactions in ribosomal proteins, proteasomal proteins and translation factors in both life cycle stages, suggesting downstream effect of the inhibition on protein synthesis and degradation pathways in Leishmania. This study defines the comprehensive RNA interactome of Leishmania and provides in-depth insight into the widespread involvement of RNA-protein interactions in Leishmania biology. IMPORTANCE Advances in proteomics and mass spectrometry have revealed the mRNA-binding proteins in many eukaryotic organisms, including the protozoan parasites Leishmania spp., the causative agents of leishmaniasis, a major infectious disease in over 90 tropical and subtropical countries. However, in addition to mRNAs, which constitute only 2 to 5% of the total transcripts, many types of non-coding RNAs participate in crucial biological processes. In Leishmania, RNA-binding proteins serve as primary gene regulators. Therefore, transcriptome-wide identification of RNA-binding proteins is necessary for deciphering the distinctive posttranscriptional mechanisms of gene regulation in Leishmania. Using a combination of highly efficient orthogonal organic phase separation method and tandem mass tag-labeling-based quantitative proteomic mass spectrometry, we provide unprecedented comprehensive molecular definition of the total RNA interactome across the two main Leishmania life cycle stages. In addition, we characterize for the first time the quantitative changes in RNA-protein interactions in Leishmania following inhibition of heat shock protein 90, shedding light into hitherto unknown large-scale downstream molecular effect of the protein inhibition in the parasite. This work provides insight into the importance of total RNA-protein interactions in Leishmania, thus significantly expanding our knowledge of the emergence of RNA-protein interactions in Leishmania biology. American Society for Microbiology 2022-02-09 /pmc/articles/PMC8826732/ /pubmed/35138191 http://dx.doi.org/10.1128/spectrum.02422-21 Text en Copyright © 2022 Kalesh et al. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Research Article
Kalesh, Karunakaran
Wei, Wenbin
Mantilla, Brian S.
Roumeliotis, Theodoros I.
Choudhary, Jyoti
Denny, Paul W.
Transcriptome-Wide Identification of Coding and Noncoding RNA-Binding Proteins Defines the Comprehensive RNA Interactome of Leishmania mexicana
title Transcriptome-Wide Identification of Coding and Noncoding RNA-Binding Proteins Defines the Comprehensive RNA Interactome of Leishmania mexicana
title_full Transcriptome-Wide Identification of Coding and Noncoding RNA-Binding Proteins Defines the Comprehensive RNA Interactome of Leishmania mexicana
title_fullStr Transcriptome-Wide Identification of Coding and Noncoding RNA-Binding Proteins Defines the Comprehensive RNA Interactome of Leishmania mexicana
title_full_unstemmed Transcriptome-Wide Identification of Coding and Noncoding RNA-Binding Proteins Defines the Comprehensive RNA Interactome of Leishmania mexicana
title_short Transcriptome-Wide Identification of Coding and Noncoding RNA-Binding Proteins Defines the Comprehensive RNA Interactome of Leishmania mexicana
title_sort transcriptome-wide identification of coding and noncoding rna-binding proteins defines the comprehensive rna interactome of leishmania mexicana
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8826732/
https://www.ncbi.nlm.nih.gov/pubmed/35138191
http://dx.doi.org/10.1128/spectrum.02422-21
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