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DHX36 resolves G-rich structures in mRNA untranslated region to allow their translation [Ribo-Seq]

ABSTRACT: DHX36 is a ATP-dependent, 3´-5´ RNA helicase of the DEAH family. Previous publications reported this helicase to associate with AU-rich elements and to specifically unwind G-quadruplex structures. Here, we performed Ribosome footprintin in triplicats of HEK293 wildtype cells and DHX36-KO-HEK293 cells to identify changes in ribosome occupancy on mRNAs upon presence or absence of this helicase. After sequencing and mapping to the human genome at nucleotide-resolution level we analysed the coverage of ribosomes on target mRNAs, identified in this study (see PAR-CLIP). Our analyses show that only minor changes upon DHX36 knockout can be observed.

ORGANISM(S): Homo sapiens

PROVIDER: GSE105172 | GEO | 2019/07/01

REPOSITORIES: GEO

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DHX36 resolves G-rich structures in mRNA untranslated region to allow their translation [ChrRNA-seq]

Project description:DHX36 is a ATP-dependent, 3´-5´ RNA helicase of the DEAH family. Previous publications reported this helicase to associate with AU-rich elements and to specifically unwind G-quadruplex structures. Here, we performed RNA-seq in triplicats of HEK293 wildtype cells and DHX36-KO-HEK293 cells to identify changes in RNA abundance upon presence or absence of this helicase. After sequencing and mapping to the human genome at nucleotide-resolution level we analysed the mRNA abundance of target mRNAs, identified in this study (see PAR-CLIP). Our analyses show that binding of DHX36 to 3´UTRS of target mRNAs significantly reduce their abundance.

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DHX36 resolves G-rich structures in mRNA untranslated region to allow their translation [cPDS-RNA-seq]

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DHX36 resolves G-rich structures in mRNA untranslated region to allow their translation [PAR-CLIP-seq]

Project description:DHX36 is a ATP-dependent, 3´-5´ RNA helicase of the DEAH family. Previous publications reported this helicase to associate with AU-rich elements and to specifically unwind G-quadruplex structures. Here, we performed PAR-CLIP in duplicates to specifically crosslink DHX36 and helicase-dead DHX36 E335A to its RNA binding targets in HEK293 cells. After sequencing and mapping to the human genome at nucleotide-resolution level we combined sequencing reads to a total of over 60000 binding clusters on more than 9000 transcripts. Distribution analyses revealed that DHX36 binds mainly to CDSs and 3´UTRS of mRNAs. Also, a G-rich binding motif for DHX36 was identified.

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DHX36 is the missing link to understand RNA G-quadruplex structures, mRNA stability, and translation [RNA-seq]

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Transcriptomic RNA structure mapping unveils the structure dynamic induced by DHX36 binding (Structure-seq)

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DHX36 binding induces RNA structurome remodeling and regulates RNA abundance via m6A/YTHDF1

Project description:RNA structure constitutes a new layer of gene regulatory mechanisms. RNA binding proteins can modulate RNA secondary structures, thus participating in post-transcriptional regulation. The DEAH-box helicase 36 (DHX36) is known to bind and unwind RNA G-quadruplex (rG4) structure but the transcriptome-wide RNA structure remodeling induced by DHX36 binding and the impact on RNA fate remain poorly understood. Here, we investigate the RNA structurome alteration induced by DHX36 depletion. Our findings reveal that DHX36 binding induces structure remodeling not only at the localized binding sites but also on the entire mRNA transcript most pronounced in3’UTR regions. DHX36 binding increase structural accessibility at 3’UTRs which is correlated with decreased post-transcriptional mRNA abundance. Further analyses and experiments uncover that DHX36 binding sites are enriched for N6-methyladenosine (m6A) modification and YTHDF1 binding; and DHX36 induced structural change may facilitate YTHDF1 binding to m6A sites leading to RNA degradation. Altogether, our findings uncover the structural remodeling effect of DHX36 binding and its impact on RNA abundance through regulating m6A dependent YTHDF1 binding.

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Project description:In this study, we deciphered the functions of Dhx36 and related molecular mechanisms in muscle stem cells and muscle regeneration. We found Dhx36 was highly induced in activated muscle stem cells during regeneration induced by injury. Conditional inactivation of Dhx36 in mouse muscle stem cells caused significant impaired regeneration, which was due to the dramatically decreased cell proliferation. Dhx36 was a well-known RNA helicase for binding/unbinding DNA/RNA G-quadruplexes and it was dominantly expressed in cytoplasm of proliferating myoblast. Therefore CLIP-seq was conducted to identify the mRNAs interacting with Dhx36 in myoblast cells.

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System-wide analysis of Dhx36 function in skeletal muscle satellite cells reveals its binding with 5’UTR G4 structure to promote Gnai2 RNA translation

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2021-04-27 | GSE151124 | GEO

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