Evidence map›Paper›PMID 21282648›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2011

Enhanced T-cell signaling in cells bearing linker for activation of T-cell (LAT) molecules resistant to ubiquitylation.

Lakshmi Balagopalan, Benjamin A Ashwell, Kelsie M Bernot, Itoro O Akpan, Naeha Quasba, Valarie A Barr, Lawrence E Samelson

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 42 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
42citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 12% 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

42 citing papers in PubMed, 1 synthesis or guideline pooled it, 59 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Proteostasis of immune checkpoint receptors.The Biochemical journal · 2025
    Review
  6. Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Review
  13. LRCH1 deficiency enhances LAT signalosome formation and CD8Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  14. Review
  15. Microclusters as T Cell Signaling Hubs: Structure, Kinetics, and Regulation.Frontiers in cell and developmental biology · 2020
    Review
  16. Review
  17. Article
  18. Article
  19. Orchestration of Immunological Synapse Assembly by Vesicular Trafficking.Frontiers in cell and developmental biology · 2019
    Review
  20. Article
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 4 institutions in 1 country.

Lakshmi BalagopalanLaboratory of Cellular and Molecular Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
Benjamin A Ashwell
Kelsie M Bernot
Itoro O Akpan
Naeha Quasba
Valarie A Barr
Lawrence E Samelson
National Cancer Institute · USHarvard University · USCenter for Cancer Research · USNational Institutes of Health · US

Funding

Biochemical Basis of T Cell ActivationZIABC010304 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI SAMELSON, LAWRENCE · 2009 to 2025
$36.3M
Confocal Core for the Laboratory of Cellular and Molecular BiologyZICBC010978 · NCI · DIVISION OF BASIC SCIENCES - NCI · PI PALLIKKUTH, SANDEEP · 2009 to 2025
$7.6M
Intramural NIH HHS
6 · The paper itself

Abstract

Linker for activation of T cells (LAT) plays a central role in T-cell activation by nucleating signaling complexes that are critical for the propagation of T-cell signals from the plasma membrane to the cellular interior. The role of phosphorylation and palmitoylation in LAT function has been well studied, but not much is known about other strategies by which the cell modulates LAT activity. We have focused on LAT ubiquitylation and have mapped the sites on which LAT is ubiquitylated. To elucidate the biological role of this process, we substituted LAT lysines with arginines. This resulted in a dramatic decrease in overall LAT ubiquitylation. Ubiquitylation-resistant mutants of LAT were internalized at rates comparable to wild-type LAT in a mechanism that required Cbl family proteins. However, these mutants displayed a defect in protein turnover rates. T-cell signaling was elevated in cells reconstituted with LAT mutants resistant to ubiquitylation, indicating that inhibition of LAT ubiquitylation enhances T-cell potency. These results support LAT ubiquitylation as a molecular checkpoint for attenuation of T-cell signaling.

Indexed as

Adaptor Proteins, Signal TransducingAnimalsAntibodies, MonoclonalChlorocebus aethiopsCOS CellsDNA PrimersFlow CytometryFluorescenceHumansImmunoblottingImmunoprecipitationJurkat CellsLymphocyte ActivationMembrane ProteinsMicroscopy, ConfocalMutationAdaptor Proteins, Signal TransducingAntibodies, MonoclonalDNA PrimersLAT protein, humanMembrane ProteinsRNA, Small Interfering

Identifiers

PMID21282648
PMCPMC3041139
OpenAlexW2094338475

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.