Evidence map›Paper›PMID 31431626›Full record

ArticleNature communications2019

Structures of T7 bacteriophage portal and tail suggest a viral DNA retention and ejection mechanism.

Ana Cuervo, Montserrat Fàbrega-Ferrer, Cristina Machón, José Javier Conesa, Francisco J Fernández, Rosa Pérez-Luque, Mar Pérez-Ruiz, Joan Pous, M Cristina Vega, José L Carrascosa and 1 more

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2019. 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
7.1field-weighted citation impact, top 3% 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, 99 citations in OpenAlex.

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  14. Cryo-EM structure of cyanopodophage A4 reveals a pentameric pre-ejectosome in the double-stabilized capsid.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  19. Viral Genome Delivery Across Bacterial Cell Surfaces.Annual review of microbiology · 2024
    Review
  20. Article

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

11 authors at 4 institutions in 1 country.

Ana CuervoCentro Nacional de Biotecnología, (CNB-CSIC), Darwin 3, 28049, Madrid, Spain.
Montserrat Fàbrega-FerrerInstitute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028, Barcelona, Spain.
Cristina MachónInstitute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028, Barcelona, Spain.ORCID http://orcid.org/0000-0001-5363-2958
José Javier ConesaCentro Nacional de Biotecnología, (CNB-CSIC), Darwin 3, 28049, Madrid, Spain.
Francisco J FernándezCentro de Investigaciones Biológicas (CIB-CSIC), Ramiro de Maeztu 9, 28040, Madrid, Spain.ORCID http://orcid.org/0000-0002-5015-1849
Rosa Pérez-LuqueInstitute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028, Barcelona, Spain.
Mar Pérez-RuizCentro Nacional de Biotecnología, (CNB-CSIC), Darwin 3, 28049, Madrid, Spain.
Joan PousInstitute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028, Barcelona, Spain.ORCID http://orcid.org/0000-0002-3188-7674
M Cristina VegaCentro de Investigaciones Biológicas (CIB-CSIC), Ramiro de Maeztu 9, 28040, Madrid, Spain.
José L CarrascosaCentro Nacional de Biotecnología, (CNB-CSIC), Darwin 3, 28049, Madrid, Spain. jlcarras@cnb.csic.es.
Miquel CollInstitute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac 10, 08028, Barcelona, Spain. miquel.coll@irbbarcelona.org.ORCID http://orcid.org/0000-0003-4471-8674
Institute for Research in Biomedicine · ESCentro Nacional de Biotecnología · ESCentro de Investigaciones Biológicas Margarita Salas · ESSOM Biotech (Spain) · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Double-stranded DNA bacteriophages package their genome at high pressure inside a procapsid through the portal, an oligomeric ring protein located at a unique capsid vertex. Once the DNA has been packaged, the tail components assemble on the portal to render the mature infective virion. The tail tightly seals the ejection conduit until infection, when its interaction with the host membrane triggers the opening of the channel and the viral genome is delivered to the host cell. Using high-resolution cryo-electron microscopy and X-ray crystallography, here we describe various structures of the T7 bacteriophage portal and fiber-less tail complex, which suggest a possible mechanism for DNA retention and ejection: a portal closed conformation temporarily retains the genome before the tail is assembled, whereas an open portal is found in the tail. Moreover, a fold including a seven-bladed β-propeller domain is described for the nozzle tail protein.

Indexed as

DNA PackagingModels, MolecularBacteriophage T7CapsidCapsid ProteinsCryoelectron MicroscopyCrystallography, X-RayDNA, ViralProtein DomainsCapsid ProteinsDNA, Viral

Identifiers

PMID31431626
PMCPMC6702177
OpenAlexW2969353230

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.