Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing.
The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear...
Ausführliche Beschreibung
Autor*in: |
Philip J Shaw [verfasserIn] Pavita Kaewprommal [verfasserIn] Chayaphat Wongsombat [verfasserIn] Chumpol Ngampiw [verfasserIn] Tana Taechalertpaisarn [verfasserIn] Sumalee Kamchonwongpaisan [verfasserIn] Sissades Tongsima [verfasserIn] Jittima Piriyapongsa [verfasserIn] |
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E-Artikel |
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Englisch |
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2022 |
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Übergeordnetes Werk: |
In: PLoS ONE - Public Library of Science (PLoS), 2007, 17(2022), 11, p e0276956 |
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Übergeordnetes Werk: |
volume:17 ; year:2022 ; number:11, p e0276956 |
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DOI / URN: |
10.1371/journal.pone.0276956 |
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Katalog-ID: |
DOAJ083584196 |
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520 | |a The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear-fractionated RNA from intra-erythrocytic stages and converted to cDNA library. The cDNA libraries were sequenced on PacBio and Nanopore long-read platforms. 12,495 novel isoforms were annotated from the data. Alternative 5' and 3' ends represent the majority of isoform events among the novel isoforms, with retained introns being the next most common event. The majority of alternative 5' ends correspond to genomic regions with features similar to those of the reference transcript 5' ends. However, a minority of alternative 5' ends showed markedly different features, including locations within protein-coding regions. Alternative 3' ends showed similar features to the reference transcript 3' ends, notably adenine-rich termination signals. Distinguishing features of retained introns could not be observed, except for a tendency towards shorter length and greater GC content compared with spliced introns. Expression of antisense and retained intron isoforms was detected at different intra-erythrocytic stages, suggesting developmental regulation of these isoform events. To gain insights into the possible functions of the novel isoforms, their protein-coding potential was assessed. Variants of P. falciparum proteins and novel proteins encoded by alternative open reading frames suggest that P. falciparum has a greater proteomic repertoire than the current annotation. We provide a catalog of annotated transcripts and encoded alternative proteins to support further studies on gene and protein regulation of this pathogen. | ||
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10.1371/journal.pone.0276956 doi (DE-627)DOAJ083584196 (DE-599)DOAJ43720a9730ac4faf8e4fbacb580c9ec5 DE-627 ger DE-627 rakwb eng Philip J Shaw verfasserin aut Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear-fractionated RNA from intra-erythrocytic stages and converted to cDNA library. The cDNA libraries were sequenced on PacBio and Nanopore long-read platforms. 12,495 novel isoforms were annotated from the data. Alternative 5' and 3' ends represent the majority of isoform events among the novel isoforms, with retained introns being the next most common event. The majority of alternative 5' ends correspond to genomic regions with features similar to those of the reference transcript 5' ends. However, a minority of alternative 5' ends showed markedly different features, including locations within protein-coding regions. Alternative 3' ends showed similar features to the reference transcript 3' ends, notably adenine-rich termination signals. Distinguishing features of retained introns could not be observed, except for a tendency towards shorter length and greater GC content compared with spliced introns. Expression of antisense and retained intron isoforms was detected at different intra-erythrocytic stages, suggesting developmental regulation of these isoform events. To gain insights into the possible functions of the novel isoforms, their protein-coding potential was assessed. Variants of P. falciparum proteins and novel proteins encoded by alternative open reading frames suggest that P. falciparum has a greater proteomic repertoire than the current annotation. We provide a catalog of annotated transcripts and encoded alternative proteins to support further studies on gene and protein regulation of this pathogen. Medicine R Science Q Pavita Kaewprommal verfasserin aut Chayaphat Wongsombat verfasserin aut Chumpol Ngampiw verfasserin aut Tana Taechalertpaisarn verfasserin aut Sumalee Kamchonwongpaisan verfasserin aut Sissades Tongsima verfasserin aut Jittima Piriyapongsa verfasserin aut In PLoS ONE Public Library of Science (PLoS), 2007 17(2022), 11, p e0276956 (DE-627)523574592 (DE-600)2267670-3 19326203 nnns volume:17 year:2022 number:11, p e0276956 https://doi.org/10.1371/journal.pone.0276956 kostenfrei https://doaj.org/article/43720a9730ac4faf8e4fbacb580c9ec5 kostenfrei https://doi.org/10.1371/journal.pone.0276956 kostenfrei https://doaj.org/toc/1932-6203 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_34 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_235 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 2022 11, p e0276956 |
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10.1371/journal.pone.0276956 doi (DE-627)DOAJ083584196 (DE-599)DOAJ43720a9730ac4faf8e4fbacb580c9ec5 DE-627 ger DE-627 rakwb eng Philip J Shaw verfasserin aut Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear-fractionated RNA from intra-erythrocytic stages and converted to cDNA library. The cDNA libraries were sequenced on PacBio and Nanopore long-read platforms. 12,495 novel isoforms were annotated from the data. Alternative 5' and 3' ends represent the majority of isoform events among the novel isoforms, with retained introns being the next most common event. The majority of alternative 5' ends correspond to genomic regions with features similar to those of the reference transcript 5' ends. However, a minority of alternative 5' ends showed markedly different features, including locations within protein-coding regions. Alternative 3' ends showed similar features to the reference transcript 3' ends, notably adenine-rich termination signals. Distinguishing features of retained introns could not be observed, except for a tendency towards shorter length and greater GC content compared with spliced introns. Expression of antisense and retained intron isoforms was detected at different intra-erythrocytic stages, suggesting developmental regulation of these isoform events. To gain insights into the possible functions of the novel isoforms, their protein-coding potential was assessed. Variants of P. falciparum proteins and novel proteins encoded by alternative open reading frames suggest that P. falciparum has a greater proteomic repertoire than the current annotation. We provide a catalog of annotated transcripts and encoded alternative proteins to support further studies on gene and protein regulation of this pathogen. Medicine R Science Q Pavita Kaewprommal verfasserin aut Chayaphat Wongsombat verfasserin aut Chumpol Ngampiw verfasserin aut Tana Taechalertpaisarn verfasserin aut Sumalee Kamchonwongpaisan verfasserin aut Sissades Tongsima verfasserin aut Jittima Piriyapongsa verfasserin aut In PLoS ONE Public Library of Science (PLoS), 2007 17(2022), 11, p e0276956 (DE-627)523574592 (DE-600)2267670-3 19326203 nnns volume:17 year:2022 number:11, p e0276956 https://doi.org/10.1371/journal.pone.0276956 kostenfrei https://doaj.org/article/43720a9730ac4faf8e4fbacb580c9ec5 kostenfrei https://doi.org/10.1371/journal.pone.0276956 kostenfrei https://doaj.org/toc/1932-6203 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_34 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_235 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 2022 11, p e0276956 |
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10.1371/journal.pone.0276956 doi (DE-627)DOAJ083584196 (DE-599)DOAJ43720a9730ac4faf8e4fbacb580c9ec5 DE-627 ger DE-627 rakwb eng Philip J Shaw verfasserin aut Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear-fractionated RNA from intra-erythrocytic stages and converted to cDNA library. The cDNA libraries were sequenced on PacBio and Nanopore long-read platforms. 12,495 novel isoforms were annotated from the data. Alternative 5' and 3' ends represent the majority of isoform events among the novel isoforms, with retained introns being the next most common event. The majority of alternative 5' ends correspond to genomic regions with features similar to those of the reference transcript 5' ends. However, a minority of alternative 5' ends showed markedly different features, including locations within protein-coding regions. Alternative 3' ends showed similar features to the reference transcript 3' ends, notably adenine-rich termination signals. Distinguishing features of retained introns could not be observed, except for a tendency towards shorter length and greater GC content compared with spliced introns. Expression of antisense and retained intron isoforms was detected at different intra-erythrocytic stages, suggesting developmental regulation of these isoform events. To gain insights into the possible functions of the novel isoforms, their protein-coding potential was assessed. Variants of P. falciparum proteins and novel proteins encoded by alternative open reading frames suggest that P. falciparum has a greater proteomic repertoire than the current annotation. We provide a catalog of annotated transcripts and encoded alternative proteins to support further studies on gene and protein regulation of this pathogen. Medicine R Science Q Pavita Kaewprommal verfasserin aut Chayaphat Wongsombat verfasserin aut Chumpol Ngampiw verfasserin aut Tana Taechalertpaisarn verfasserin aut Sumalee Kamchonwongpaisan verfasserin aut Sissades Tongsima verfasserin aut Jittima Piriyapongsa verfasserin aut In PLoS ONE Public Library of Science (PLoS), 2007 17(2022), 11, p e0276956 (DE-627)523574592 (DE-600)2267670-3 19326203 nnns volume:17 year:2022 number:11, p e0276956 https://doi.org/10.1371/journal.pone.0276956 kostenfrei https://doaj.org/article/43720a9730ac4faf8e4fbacb580c9ec5 kostenfrei https://doi.org/10.1371/journal.pone.0276956 kostenfrei https://doaj.org/toc/1932-6203 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_34 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_235 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 2022 11, p e0276956 |
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10.1371/journal.pone.0276956 doi (DE-627)DOAJ083584196 (DE-599)DOAJ43720a9730ac4faf8e4fbacb580c9ec5 DE-627 ger DE-627 rakwb eng Philip J Shaw verfasserin aut Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear-fractionated RNA from intra-erythrocytic stages and converted to cDNA library. The cDNA libraries were sequenced on PacBio and Nanopore long-read platforms. 12,495 novel isoforms were annotated from the data. Alternative 5' and 3' ends represent the majority of isoform events among the novel isoforms, with retained introns being the next most common event. The majority of alternative 5' ends correspond to genomic regions with features similar to those of the reference transcript 5' ends. However, a minority of alternative 5' ends showed markedly different features, including locations within protein-coding regions. Alternative 3' ends showed similar features to the reference transcript 3' ends, notably adenine-rich termination signals. Distinguishing features of retained introns could not be observed, except for a tendency towards shorter length and greater GC content compared with spliced introns. Expression of antisense and retained intron isoforms was detected at different intra-erythrocytic stages, suggesting developmental regulation of these isoform events. To gain insights into the possible functions of the novel isoforms, their protein-coding potential was assessed. Variants of P. falciparum proteins and novel proteins encoded by alternative open reading frames suggest that P. falciparum has a greater proteomic repertoire than the current annotation. We provide a catalog of annotated transcripts and encoded alternative proteins to support further studies on gene and protein regulation of this pathogen. Medicine R Science Q Pavita Kaewprommal verfasserin aut Chayaphat Wongsombat verfasserin aut Chumpol Ngampiw verfasserin aut Tana Taechalertpaisarn verfasserin aut Sumalee Kamchonwongpaisan verfasserin aut Sissades Tongsima verfasserin aut Jittima Piriyapongsa verfasserin aut In PLoS ONE Public Library of Science (PLoS), 2007 17(2022), 11, p e0276956 (DE-627)523574592 (DE-600)2267670-3 19326203 nnns volume:17 year:2022 number:11, p e0276956 https://doi.org/10.1371/journal.pone.0276956 kostenfrei https://doaj.org/article/43720a9730ac4faf8e4fbacb580c9ec5 kostenfrei https://doi.org/10.1371/journal.pone.0276956 kostenfrei https://doaj.org/toc/1932-6203 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_34 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_171 GBV_ILN_206 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_235 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_2522 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 17 2022 11, p e0276956 |
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Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing |
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Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing. |
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Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing |
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transcriptomic complexity of the human malaria parasite plasmodium falciparum revealed by long-read sequencing |
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Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing. |
abstract |
The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear-fractionated RNA from intra-erythrocytic stages and converted to cDNA library. The cDNA libraries were sequenced on PacBio and Nanopore long-read platforms. 12,495 novel isoforms were annotated from the data. Alternative 5' and 3' ends represent the majority of isoform events among the novel isoforms, with retained introns being the next most common event. The majority of alternative 5' ends correspond to genomic regions with features similar to those of the reference transcript 5' ends. However, a minority of alternative 5' ends showed markedly different features, including locations within protein-coding regions. Alternative 3' ends showed similar features to the reference transcript 3' ends, notably adenine-rich termination signals. Distinguishing features of retained introns could not be observed, except for a tendency towards shorter length and greater GC content compared with spliced introns. Expression of antisense and retained intron isoforms was detected at different intra-erythrocytic stages, suggesting developmental regulation of these isoform events. To gain insights into the possible functions of the novel isoforms, their protein-coding potential was assessed. Variants of P. falciparum proteins and novel proteins encoded by alternative open reading frames suggest that P. falciparum has a greater proteomic repertoire than the current annotation. We provide a catalog of annotated transcripts and encoded alternative proteins to support further studies on gene and protein regulation of this pathogen. |
abstractGer |
The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear-fractionated RNA from intra-erythrocytic stages and converted to cDNA library. The cDNA libraries were sequenced on PacBio and Nanopore long-read platforms. 12,495 novel isoforms were annotated from the data. Alternative 5' and 3' ends represent the majority of isoform events among the novel isoforms, with retained introns being the next most common event. The majority of alternative 5' ends correspond to genomic regions with features similar to those of the reference transcript 5' ends. However, a minority of alternative 5' ends showed markedly different features, including locations within protein-coding regions. Alternative 3' ends showed similar features to the reference transcript 3' ends, notably adenine-rich termination signals. Distinguishing features of retained introns could not be observed, except for a tendency towards shorter length and greater GC content compared with spliced introns. Expression of antisense and retained intron isoforms was detected at different intra-erythrocytic stages, suggesting developmental regulation of these isoform events. To gain insights into the possible functions of the novel isoforms, their protein-coding potential was assessed. Variants of P. falciparum proteins and novel proteins encoded by alternative open reading frames suggest that P. falciparum has a greater proteomic repertoire than the current annotation. We provide a catalog of annotated transcripts and encoded alternative proteins to support further studies on gene and protein regulation of this pathogen. |
abstract_unstemmed |
The Plasmodium falciparum human malaria parasite genome is incompletely annotated and does not accurately represent the transcriptomic diversity of this species. To address this need, we performed long-read transcriptomic sequencing. 5' capped mRNA was enriched from samples of total and nuclear-fractionated RNA from intra-erythrocytic stages and converted to cDNA library. The cDNA libraries were sequenced on PacBio and Nanopore long-read platforms. 12,495 novel isoforms were annotated from the data. Alternative 5' and 3' ends represent the majority of isoform events among the novel isoforms, with retained introns being the next most common event. The majority of alternative 5' ends correspond to genomic regions with features similar to those of the reference transcript 5' ends. However, a minority of alternative 5' ends showed markedly different features, including locations within protein-coding regions. Alternative 3' ends showed similar features to the reference transcript 3' ends, notably adenine-rich termination signals. Distinguishing features of retained introns could not be observed, except for a tendency towards shorter length and greater GC content compared with spliced introns. Expression of antisense and retained intron isoforms was detected at different intra-erythrocytic stages, suggesting developmental regulation of these isoform events. To gain insights into the possible functions of the novel isoforms, their protein-coding potential was assessed. Variants of P. falciparum proteins and novel proteins encoded by alternative open reading frames suggest that P. falciparum has a greater proteomic repertoire than the current annotation. We provide a catalog of annotated transcripts and encoded alternative proteins to support further studies on gene and protein regulation of this pathogen. |
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Transcriptomic complexity of the human malaria parasite Plasmodium falciparum revealed by long-read sequencing. |
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