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A new N6-methyladenosine methyltransferase ZCCHC4 mediates rRNA methylation and mRNA interaction

ABSTRACT: N6-methyladenosine (m6A) plays critical roles in a wide range of physiological and pathological processes, and m6A methyltransferases are still being discovered for different RNA species in mammals. Here report a new m6A methyltransferase ZCCHC4 that methylates ribosomal RNA (rRNA) and interacts with messenger RNA (mRNA), ZCCHC4 has methylation activity on rRNA with a preference for AAC consensus sequence. ZCCHC4 can affect global translation through m6A methylation, mostly on 28S rRNA.

ORGANISM(S): Homo sapiens

PROVIDER: GSE102336 | GEO | 2018/09/25

REPOSITORIES: GEO

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The human methyltransferase ZCCHC4 catalyses N6-methyladenosine modification of 28S ribosomal RNA

Project description:RNA methylations are essential both for RNA structure and function, and are introduced by a number of distinct methyltransferases (MTases). In recent years, N6-methyladenosine (m6A) modification of eukaryotic mRNA has been subject to intense studies, and it has been demonstrated that m6A is a reversible modification that regulates several aspects of mRNA function. However, m6A is also found in other RNAs, such as mammalian 18S and 28S ribosomal RNAs (rRNAs), but the responsible MTases have remained elusive. 28S rRNA carries a single m6A modification, found at position A4220 (alternatively referred to as A4190) within a stem-loop structure, and here we show that the MTase ZCCHC4 is the enzyme responsible for introducing this modification. Accordingly, we found that ZCCHC4 localises to nucleoli, the site of ribosome assembly, and that proteins involved in RNA metabolism are overrepresented in the ZCCHC4 interactome. Interestingly, the absence of m6A4220 perturbs codon-specific translation dynamics and shifts gene expression at the translational level. In summary, we establish ZCCHC4 as the enzyme responsible for m6A modification of human 28S rRNA, and demonstrate its functional significance in mRNA translation.

2019-11-25 | GSE128994 | GEO

Identification of human proteins whose binding to the N6-methyladenosine-containing hairpin from 28S rRNA is modulated by methylation

Project description:We have recently found that the human methyltransferase ZCCHC4 is responsible for introducing the single m6A modification in 28S rRNA. The project is aimed at further elucidating the functional consequences of such methylation. To this end, protein mass spectrometry is utilized to identify proteins that bind preferentially to the methylated or unmethylated form of the m6A containing hairpin sequence in 28S rRNA. Specifically, this is done by incubating a HeLa cell extract with an methylated or unmethylated RNA oligonucleotide containing a biotin affinity tag, which is used to pull-down the RNA with associated proteins.

2019-11-22 | PXD013354 | Pride

The human 18S rRNA m6A methyltransferase METTL5 is stabilized by TRMT112

Project description:N6-methyladenosine (m6A) has recently been found abundantly on messenger RNA and shown to regulate most steps of mRNA metabolism. Several important m6A methyltransferases have been described functionally and structurally, but the enzymes responsible for installing one m6A residue on each subunit of human ribosomes at functionally important sites have eluded identification for over 30 years. Here we identify METTL5 as the enzyme responsible for 18S rRNA m6A modification and confirm ZCCHC4 as the 28S rRNA modification enzyme. We show that METTL5 must form a heterodimeric complex with TRMT112, a known methyltransferase activator, to gain metabolic stability in cells. We provide the first atomic resolution structure of METTL5-TRMT112, supporting that its RNA binding mode differs distinctly from that of other m6A RNA methyltransferases. On the basis of similarities with a DNA methyltransferase, we propose that METTL5-TRMT112 acts by extruding the adenosine to be modified from a double-stranded nucleic acid.

2019-07-15 | GSE128699 | GEO

RNA bisulfite sequencing of 25S rRNA (C2278) in S. cerevisiae and of 28S rRNA (C3381) in C. elegans

Project description:The RNA methyltransferase NSUN5 modulates the lifespans of yeast, worms and flies by re-programming the translation of specific subsets of mRNAs, which are associated with the cellular stress response. Here we show by RNA bisulfite sequencing that Rcm1 specifically methylates C2278 of yeast 25S rRNA and nsun-5 C3381 of C. elegans 28S rRNA.

2014-11-10 | GSE63113 | GEO

The human methyltransferase ZCCHC4 catalyses N6-methyladenosine modification of 28S ribosomal RNA

Project description:The human methyltransferase ZCCHC4 catalyses N6-methyladenosine modification of 28S ribosomal RNA

| PRJNA529661 | ENA

METTL5, an 18S rRNA-specific m6A methyltransferase, regulates the Integrated Stress Response [eCLIP]

Project description:RNA N6-methyladenosine (m6A) modification is present in different RNA molecules, including protein-coding mRNAs and non-coding RNAs such as ribosomal RNAs (rRNAs).Here, we report that mammalian METTL5, a member of a highly conserved methyltransferase family, specifically methylates adenosine 1832 (A1832) in the 18S rRNA in vivo and in vitro.

2020-09-17 | GSE138123 | GEO

ZCCHC4 Interacts with AL133467.2 and gamma H2AX to Promote Chemoresistance in Hepatocellular Carcinoma [UV-CLIP_ZCCHC4]

Project description:Purpose: We performed UV-CLIP-seq to investigate the RNAs interacting with ZCCHC4. The goal of this study is to investigate the role of ZCCHC4 in regulating the progression and prognosis of HCC. We have found that ZCCHC4 could inhibit DNA damage agent induced DNA damage and apoptosis of HCC, and promote chemoresistance. We proposed that ZCCHC4 could interact with RNAs to regulate chemoresistance.

2022-07-27 | GSE188703 | GEO

ZCCHC4 Interacts with AL133467.2 and gamma H2AX to Promote Chemoresistance in Hepatocellular Carcinoma [HepG2_ZCCHC4 KO]

Project description:Purpose: We performed RNA sequencing (RNA-seq) analysis of ZCCHC4 KO1 cells and wild type cells to find differentially expressed genes regulated by ZCCHC4 in HCC cells. The goal of this study is to investigate the biological effect of ZCCHC4 in HCC progression and prognosis.

2022-07-27 | GSE188702 | GEO

Interactome of human ZCCHC4 - Exploration of the ZCCHC4 interactome through affinity proteomics.

Project description:Exploration of the ZCCHC4 interactome through affinity proteomics.

2019-11-22 | PXD012346 | Pride

Arginine methylation of the intrinsically disordered C-terminus of METTL14 controls N6-methyladenosine function in DNA repair

Project description:The N6-methyladenosine (m6A) RNA modification serves crucial functions in RNA metabolism; however, the molecular mechanisms underlying the regulation of m6A are not well understood. Here, we establish arginine methylation of METTL14, a component of the m6A methyltransferase complex, as a novel pathway that controls the function of m6A in DNA repair. Specifically, protein arginine methyltransferase 1 (PRMT1) interacts with and methylates the intrinsically disordered C-terminus of METTL14, which promotes its interaction with RNA substrates, enhances its RNA methylation activity, and is crucial for its interaction with RNAPII. Mouse embryonic stem cells (mESCs) expressing arginine methylation-deficient METTL14 exhibit dramatically reduced global m6A levels. Transcriptome-wide m6A analysis reveals that arginine methylation-dependent m6A enhances the translation of genes essential for the repair of DNA interstrand crosslinks; thus, METTL14 arginine methylation-deficient mESCs are hypersensitive to DNA crosslinking agents. Collectively, these findings reveal important aspects of m6A regulation that could have broad implications in normal development and in diseases such as cancer.

2020-12-01 | GSE160108 | GEO

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