Evidence map›Paper›PMID 1846022›Full record

ArticleMolecular and cellular biology1991

Muscle-specific expression of the troponin I gene requires interactions between helix-loop-helix muscle regulatory factors and ubiquitous transcription factors.

H Lin, K E Yutzey, S F Konieczny

Open access · greenAbstract read
In one paragraph

Article in Molecular and cellular biology, 1991. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed
10.3field-weighted citation impact, top 1% 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

70 citing papers in PubMed, 163 citations in OpenAlex.

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  3. Loss of Prox1 in striated muscle causes slow to fast skeletal muscle fiber conversion and dilated cardiomyopathy.Proceedings of the National Academy of Sciences of the United States of America · 2014
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10 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.

H LinDepartment of Biological Sciences, Purdue University, West Lafayette, Indiana 47907.
K E Yutzey
S F Konieczny
Purdue University West Lafayette · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The quail fast skeletal troponin I (TnI) gene is a member of the contractile protein gene set and is expressed exclusively in differentiated skeletal muscle cells. TnI gene transcription is controlled by an internal regulatory element (IRE), located within the first intron, that functions as a muscle-specific enhancer. Recent studies have shown that the TnI IRE may interact directly with the muscle regulatory factors MyoD, myogenin, and Myf-5 to produce a muscle-specific expression pattern, since these factors trans-activate cotransfected TnI gene constructs in C3H10T1/2 fibroblasts. In this study, we have examined the protein-IRE interactions that are responsible for transcriptionally activating the TnI gene during skeletal muscle development. We demonstrate that the helix-loop-helix muscle regulatory factors MyoD, myogenin, Myf-5, and MRF4, when complexed with the immunoglobulin enhancer-binding protein E12, interact with identical nucleotides within a muscle regulatory factor-binding site (MRF site) located in the TnI IRE. The nuclear proteins that bind to the MRF site are restricted to skeletal muscle cells, since protein extracts from HeLa, L, and C3H10T1/2 fibroblasts do not contain similar binding activities. Importantly, the TnI MRF site alone is not sufficient to elicit the full enhancer activity associated with the IRE. Instead, two additional regions (site I and site II) are required. The proteins that interact with site I and site II are expressed in both muscle and nonmuscle cell types and by themselves are ineffective in activating TnI gene expression. However, when the MRF site is positioned upstream or downstream of site I and site II, full enhancer activity is restored. We conclude that helix-loop-helix muscle regulatory factors must interact with ubiquitously expressed proteins to generate the active TnI transcription complex that is present in differentiated muscle fibers.

Indexed as

Myogenic Regulatory FactorsRegulatory Sequences, Nucleic AcidTrans-ActivatorsAnimalsBase SequenceCoturnixDNA-Binding ProteinsEnhancer Elements, GeneticGene Expression RegulationMacromolecular SubstancesMolecular Sequence DataMuscle ProteinsMusclesMyoD ProteinMyogenic Regulatory Factor 5MyogeninDNA-Binding ProteinsMacromolecular SubstancesMuscle ProteinsMyoD Proteinmyogenic factor 6Myogenic Regulatory Factor 5Myogenic Regulatory FactorsMyogeninNuclear ProteinsOligonucleotidesTrans-ActivatorsTranscription FactorsTroponinTroponin I

Identifiers

PMID1846022
PMCPMC359617
OpenAlexW1899911036

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.