Evidence map›Paper›PMID 7512259›Full record

ArticleNucleic acids research1994

A group III twintron encoding a maturase-like gene excises through lariat intermediates.

D W Copertino, E T Hall, F W Van Hook, K P Jenkins, R B Hallick

Abstract read
In one paragraph

Article in Nucleic acids research, 1994. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
–field-weighted citation impact
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

16 citing papers in PubMed.

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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

5 authors.

D W CopertinoDepartment of Biochemistry, University of Arizona, Tucson 85721.
E T Hall
F W Van Hook
K P Jenkins
R B Hallick

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The 1605 bp intron 4 of the Euglena gracilis chloroplast psbC gene was characterized as a group III twintron composed of an internal 1503 nt group III intron with an open reading frame of 1374 nt (ycf13, 458 amino acids), and an external group III intron of 102 nt. Twintron excision proceeds by a sequential splicing pathway. The splicing of the internal and external group III introns occurs via lariat intermediates. Branch sites were mapped by primer extension RNA sequencing. The unpaired adenosines in domains VI of the internal and external introns are covalently linked to the 5' nucleotide of the intron via 2'-5' phosphodiester bonds. This bond is susceptible to hydrolysis by the debranching activity of the HeLa nuclear S100 fraction. The internal intron and presumptive ycf13 mRNA accumulates primarily as a linear RNA, although a lariat precursor can also be detected. The ycf13 gene encodes a maturase-like protein that may be involved in group III intron metabolism.

Indexed as

IntronsAnimalsBase SequenceBlotting, NorthernChloroplastsCloning, MolecularDNA, ComplementaryEuglena gracilisMolecular Sequence DataNucleic Acid ConformationOpen Reading FramesPhotosynthetic Reaction Center Complex ProteinsPolymerase Chain ReactionRibonuclease HRNARNA, MessengerDNA, ComplementaryPhotosynthetic Reaction Center Complex ProteinsRibonuclease HRNARNA, MessengerRNA Precursors

Identifiers

PMID7512259
PMCPMC307926

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.