Evidence map›Paper›PMID 22797061›Full record

ArticleOncogene2013

Annexin A6 is a scaffold for PKCα to promote EGFR inactivation.

M Koese, C Rentero, B P Kota, M Hoque, R Cairns, P Wood, S Vilà de Muga, M Reverter, A Alvarez-Guaita, K Monastyrskaya and 6 more

Abstract read
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In one paragraph

Article in Oncogene, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed
2.1field-weighted citation impact, top 13% 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

51 citing papers in PubMed, 71 citations in OpenAlex.

  1. Article
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  4. Article
  5. Revisiting the role of Annexins in membrane trafficking.Cellular and molecular life sciences : CMLS · 2025
    Review
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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

16 authors at 5 institutions in 3 countries.

M KoeseFaculty of Pharmacy, University of Sydney, Sydney, New South Wales, Australia.
C Rentero
B P Kota
M Hoque
R Cairns
P Wood
S Vilà de Muga
M Reverter
A Alvarez-Guaita
K Monastyrskaya
W E Hughes
A Swarbrick
F Tebar
R J Daly
C Enrich
T Grewal
University of Sydney · AUConsorci Institut D'Investigacions Biomediques August Pi I Sunyer · ESGarvan Institute of Medical Research · AUUniversitat de Barcelona · ESUniversity of Bern · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Protein kinase Cα (PKCα) can phosphorylate the epidermal growth factor receptor (EGFR) at threonine 654 (T654) to inhibit EGFR tyrosine phosphorylation (pY-EGFR) and the associated activation of downstream effectors. However, upregulation of PKCα in a large variety of cancers is not associated with EGFR inactivation, and factors determining the potential of PKCα to downregulate EGFR are yet unknown. Here, we show that ectopic expression of annexin A6 (AnxA6), a member of the Ca(2+) and phospholipid-binding annexins, strongly reduces pY-EGFR levels while augmenting EGFR T654 phosphorylation in EGFR overexpressing A431, head and neck and breast cancer cell lines. Reduced EGFR activation in AnxA6 expressing A431 cells is associated with reduced EGFR internalization and degradation. RNA interference (RNAi)-mediated PKCα knockdown in AnxA6 expressing A431 cells reduces T654-EGFR phosphorylation, but restores EGFR tyrosine phosphorylation, clonogenic growth and EGFR degradation. These findings correlate with AnxA6 interacting with EGFR, and elevated AnxA6 levels promoting PKCα membrane association and interaction with EGFR. Stable expression of the cytosolic N-terminal mutant AnxA6(1-175), which cannot promote PKCα membrane recruitment, does not increase T654-EGFR phosphorylation or the association of PKCα with EGFR. AnxA6 overexpression does not inhibit tyrosine phosphorylation of the T654A EGFR mutant, which cannot be phosphorylated by PKCα. Most strikingly, stable plasma membrane anchoring of AnxA6 is sufficient to recruit PKCα even in the absence of EGF or Ca(2+). In summary, AnxA6 is a new PKCα scaffold to promote PKCα-mediated EGFR inactivation through increased membrane targeting of PKCα and EGFR/PKCα complex formation.

Indexed as

Annexin A6Cell Line, TumorCell MembraneCell ProliferationErbB ReceptorsGene Knockdown TechniquesHumansPhosphorylationProtein BindingProtein Kinase C-alphaProtein Processing, Post-TranslationalProtein TransportProteolysisRNA InterferenceSignal TransductionTyrosineAnnexin A6ErbB ReceptorsPRKCA protein, humanProtein Kinase C-alphaTyrosine

Identifiers

PMID22797061
OpenAlexW2054883111

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.