Evidence map›Paper›PMID 18669444›Full record

ArticleRNA (New York, N.Y.)2008

Sequence-specific binding of a chloroplast pentatricopeptide repeat protein to its native group II intron ligand.

Rosalind Williams-Carrier, Tiffany Kroeger, Alice Barkan

Open access · hybridAbstract read
In one paragraph

Article in RNA (New York, N.Y.), 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

64 citing papers in PubMed, 113 citations in OpenAlex.

  1. Article
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4 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

3 authors at 1 institution in 1 country.

Rosalind Williams-CarrierDepartment of Biology, Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403, USA.
Tiffany Kroeger
Alice Barkan
University of Oregon · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Pentatricopeptide repeat (PPR) proteins are defined by degenerate 35-amino acid repeats that are related to the tetratricopeptide repeat (TPR). Most characterized PPR proteins mediate specific post-transcriptional steps in gene expression in mitochondria or chloroplasts. However, little is known about the structure of PPR proteins or the biochemical mechanisms through which they act. Here we establish features of PPR protein structure and nucleic acid binding activity through in vitro experiments with PPR5, which binds and stabilizes a chloroplast tRNA precursor harboring a group II intron. Recombinant PPR5 was shown to be monomeric by analytical ultracentrifugation and gel filtration. Circular dichroism spectroscopy showed that PPR5 has a high content of alpha helices, as predicted from the similarity between PPR and TPR motifs. PPR5 and another PPR protein, CRP1, bind with high affinity to single-stranded RNA, but bind poorly to single-stranded DNA or to double-stranded RNA or DNA. A specific PPR5 binding site was identified within its group II intron ligand. The minimal site spans approximately 45 nucleotides, encompasses two group II intron functional motifs, and overlaps the terminus of an in vivo RNA decay product. These results suggest mechanisms by which PPR5 influences both RNA stability and splicing.

Indexed as

Repetitive Sequences, Amino AcidBinding SitesChloroplastsDNAIntronsLigandsPlant ProteinsProtein Structure, SecondaryRecombinant ProteinsRNAZea maysDNALigandsPlant ProteinsRecombinant ProteinsRNA

Identifiers

PMID18669444
PMCPMC2525963
OpenAlexW2107945625

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.