Evidence map›Paper›PMID 31984425›Full record

ArticleNucleic acids research2020

The identity and methylation status of the first transcribed nucleotide in eukaryotic mRNA 5' cap modulates protein expression in living cells.

Pawel J Sikorski, Marcin Warminski, Dorota Kubacka, Tomasz Ratajczak, Dominika Nowis, Joanna Kowalska, Jacek Jemielity

Open access · goldAbstract read
In one paragraph

Article in Nucleic acids research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 80 papers.

0numbers the graph read from it
0cells of the map it votes in
80citing papers in PubMed
6.8field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

80 citing papers in PubMed, 141 citations in OpenAlex.

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20 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 1 country.

Pawel J SikorskiCentre of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland.
Marcin WarminskiDivision of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland.
Dorota KubackaDivision of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland.
Tomasz RatajczakCentre of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland.
Dominika NowisCentre of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland.
Joanna KowalskaDivision of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland.
Jacek JemielityCentre of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland.
University of Warsaw · PLMedical University of Warsaw · PL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

7-Methylguanosine 5' cap on mRNA is necessary for efficient protein expression in vitro and in vivo. Recent studies revealed structural diversity of endogenous mRNA caps, which carry different 5'-terminal nucleotides and additional methylations (2'-O-methylation and m6A). Currently available 5'-capping methods do not address this diversity. We report trinucleotide 5' cap analogs (m7GpppN(m)pG), which are utilized by RNA polymerase T7 to initiate transcription from templates carrying Φ6.5 promoter and enable production of mRNAs differing in the identity of the first transcribed nucleotide (N = A, m6A, G, C, U) and its methylation status (±2'-O-methylation). HPLC-purified mRNAs carrying these 5' caps were used to study protein expression in three mammalian cell lines (3T3-L1, HeLa and JAWS II). The highest expression was observed for mRNAs carrying 5'-terminal A/Am and m6Am, whereas the lowest was observed for G and Gm. The mRNAs carrying 2'-O-methyl at the first transcribed nucleotide (cap 1) had significantly higher expression than unmethylated counterparts (cap 0) only in JAWS II dendritic cells. Further experiments indicated that the mRNA expression characteristic does not correlate with affinity for translation initiation factor 4E or in vitro susceptibility to decapping, but instead depends on mRNA purity and the immune state of the cells.

Indexed as

Transcription, GeneticAnimalsEukaryotaEukaryotic Initiation Factor-4EGene Expression RegulationHeLa CellsHumansMethylationNucleotidesProtein BiosynthesisProtein Processing, Post-TranslationalRNA CapsRNA, MessengerEukaryotic Initiation Factor-4ENucleotidesRNA CapsRNA, Messenger

Identifiers

PMID31984425
PMCPMC7038993
OpenAlexW3004398293

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.