Evidence map›Paper›PMID 30904392›Full record

ArticleMolecular cell2019

Protein Kinase C Quality Control by Phosphatase PHLPP1 Unveils Loss-of-Function Mechanism in Cancer.

Timothy R Baffi, An-Angela N Van, Wei Zhao, Gordon B Mills, Alexandra C Newton

Open access · bronzeAbstract read
In one paragraph

Article in Molecular cell, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

39 citing papers in PubMed, 59 citations in OpenAlex.

  1. Article
  2. PHLPP is neither a Phosphatase nor a Tumor Suppressor.BioEssays : news and reviews in molecular, cellular and developmental biology · 2026
    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

5 authors at 2 institutions in 1 country.

Timothy R BaffiDepartment of Pharmacology, University of California at San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California at San Diego, La Jolla, CA 92093, USA.
An-Angela N VanDepartment of Pharmacology, University of California at San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California at San Diego, La Jolla, CA 92093, USA.
Wei ZhaoDepartment of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
Gordon B MillsDepartment of Systems Biology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
Alexandra C NewtonDepartment of Pharmacology, University of California at San Diego, La Jolla, CA 92093, USA. Electronic address: anewton@ucsd.edu.
University of California, San Diego · USThe University of Texas MD Anderson Cancer Center · US

Funding

Tumor Evolution and Metastasis ProgramP30CA016672 · NCI · UNIVERSITY OF TX MD ANDERSON CAN CTR · PI Fabien Delerue · 1985 to 2026
$290.8M
GRADUATE TRAINING IN CELLULAR &MOLECULAR PHARMACOLOGYT32GM007752 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI BROWN, JOAN HELLER, HANDEL, TRACY M · 1985 to 2023
$13.5M
Molecular Mechanisms of Cell SignalingR35GM122523 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI ALEXANDRA C. NEWTON · 2017 to 2026
$6.7M
Structure, Function and Regulation of Protein Kinase CR37GM043154 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI NEWTON, ALEXANDRA C. · 2003 to 2012
$4.0M
Integrative bioinformatics and functional characterization of oncogenic driver aberrations in cancerU01CA217842 · NCI · UNIVERSITY OF TX MD ANDERSON CAN CTR · PI DENEEN, BENJAMIN, MILLS, GORDON B. · 2017 to 2021
$3.6M
STRUCTURE/FUNCTION AND REGULATION OF PROTEIN KINASE CR01GM043154 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI NEWTON, ALEXANDRA C. · 1990 to 2016
$2.5M
NCI NIH HHS P30 CA016672NCI NIH HHS U01 CA217842NIGMS NIH HHS R01 GM043154NIGMS NIH HHS R35 GM122523NIGMS NIH HHS R37 GM043154NIGMS NIH HHS T32 GM007752
6 · The paper itself

Abstract

Protein kinase C (PKC) isozymes function as tumor suppressors in increasing contexts. In contrast to oncogenic kinases, whose function is acutely regulated by transient phosphorylation, PKC is constitutively phosphorylated following biosynthesis to yield a stable, autoinhibited enzyme that is reversibly activated by second messengers. Here, we report that the phosphatase PHLPP1 opposes PKC phosphorylation during maturation, leading to the degradation of aberrantly active species that do not become autoinhibited. Cancer-associated hotspot mutations in the pseudosubstrate of PKCβ that impair autoinhibition result in dephosphorylated and unstable enzymes. Protein-level analysis reveals that PKCα is fully phosphorylated at the PHLPP site in over 5,000 patient tumors, with higher PKC levels correlating (1) inversely with PHLPP1 levels and (2) positively with improved survival in pancreatic adenocarcinoma. Thus, PHLPP1 provides a proofreading step that maintains the fidelity of PKC autoinhibition and reveals a prominent loss-of-function mechanism in cancer by suppressing the steady-state levels of PKC.

Indexed as

HumansIsoenzymesLoss of Function MutationNeoplasmsNuclear ProteinsPhosphoprotein PhosphatasesPhosphorylationProtein Kinase C-alphaProtein Kinase C betaProteolysisProto-Oncogene Proteins c-aktQuality ControlSignal TransductionIsoenzymesNuclear ProteinsPHLPP1 protein, humanPhosphoprotein PhosphatasesPRKCA protein, humanPRKCB protein, humanProtein Kinase C-alphaProtein Kinase C betaProto-Oncogene Proteins c-aktautoinhibitioncancerdegradationloss of functionpancreatic cancerPHLPP1phosphorylationprotein kinase Cquality controlreverse phase protein array

Identifiers

PMID30904392
PMCPMC6504549
OpenAlexW2923112432

What OpenQuestion holds

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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.