Evidence map›Paper›PMID 27748579›Full record

ArticleACS chemical biology2016

Molecular Mechanism for Isoform-Selective Inhibition of Acyl Protein Thioesterases 1 and 2 (APT1 and APT2).

Sang Joon Won, Dahvid Davda, Kristin J Labby, Sin Ye Hwang, Rachel Pricer, Jaimeen D Majmudar, Kira A Armacost, Laura A Rodriguez, Christina L Rodriguez, Fei San Chong and 7 more

Open access · greenAbstract read
In one paragraph

Article in ACS chemical biology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed
4.6field-weighted citation impact, top 4% 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

69 citing papers in PubMed, 104 citations in OpenAlex.

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  15. Palmitoylation in cardiovascular diseases: Molecular mechanism and therapeutic potential.International journal of cardiology. Heart & vasculature · 2025
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  20. Attenuating ABHD17 isoforms augments thebioRxiv : the preprint server for biology · 2025
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9 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

17 authors at 1 institution in 1 country.

Sang Joon WonProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Dahvid DavdaProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Kristin J LabbyProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Sin Ye HwangProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Rachel PricerProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Jaimeen D MajmudarProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Kira A ArmacostProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Laura A RodriguezProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Christina L RodriguezProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Fei San ChongProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Kristopher A TorossianProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Jasmine PalakurthiProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Edward S HurProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Jennifer L MeagherProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Charles L BrooksProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Jeanne A StuckeyProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
Brent R MartinProgram in Chemical Biology, ‡Department of Chemistry, §Department of Biophysics, and ∥Life Sciences Institute, University of Michigan , 930 N. University Ave., Ann Arbor, Michigan 48109, United States.
University of Michigan–Ann Arbor · US

Funding

Theoretical Studies of Receptor-Ligand InteractionsR01GM037554 · NIGMS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI BROOKS, CHARLES L · 1987 to 2018
$3.8M
Multiscale chemical approaches to map oxidative stressDP2GM114848 · NIGMS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI MARTIN, BRENT RANDALL · 2014 to 2014
$2.2M
Quantitative chemical proteomics of dynamic palmitoylation in cellsR00CA151460 · NCI · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI MARTIN, BRENT RANDALL · 2011 to 2013
$769k
NCI NIH HHS R00 CA151460NIGMS NIH HHS DP2 GM114848NIGMS NIH HHS R01 GM037554
6 · The paper itself

Abstract

Post-translational S-palmitoylation directs the trafficking and membrane localization of hundreds of cellular proteins, often involving a coordinated palmitoylation cycle that requires both protein acyl transferases (PATs) and acyl protein thioesterases (APTs) to actively redistribute S-palmitoylated proteins toward different cellular membrane compartments. This process is necessary for the trafficking and oncogenic signaling of S-palmitoylated Ras isoforms, and potentially many peripheral membrane proteins. The depalmitoylating enzymes APT1 and APT2 are separately conserved in all vertebrates, suggesting unique functional roles for each enzyme. The recent discovery of the APT isoform-selective inhibitors ML348 and ML349 has opened new possibilities to probe the function of each enzyme, yet it remains unclear how each inhibitor achieves orthogonal inhibition. Herein, we report the high-resolution structure of human APT2 in complex with ML349 (1.64 Å), as well as the complementary structure of human APT1 bound to ML348 (1.55 Å). Although the overall peptide backbone structures are nearly identical, each inhibitor adopts a distinct conformation within each active site. In APT1, the trifluoromethyl group of ML348 is positioned above the catalytic triad, but in APT2, the sulfonyl group of ML349 forms hydrogen bonds with active site resident waters to indirectly engage the catalytic triad and oxyanion hole. Reciprocal mutagenesis and activity profiling revealed several differing residues surrounding the active site that serve as critical gatekeepers for isoform accessibility and dynamics. Structural and biochemical analysis suggests the inhibitors occupy a putative acyl-binding region, establishing the mechanism for isoform-specific inhibition, hydrolysis of acyl substrates, and structural orthogonality important for future probe development.

Indexed as

Amino Acid SequenceEnzyme InhibitorsHumansModels, MolecularProtein Conformation, alpha-HelicalProtein IsoformsThiolester HydrolasesEnzyme InhibitorsLYPLA1 protein, humanLYPLA2 protein, humanProtein IsoformsThiolester Hydrolases

Identifiers

PMID27748579
PMCPMC5359770
OpenAlexW2532194044

What OpenQuestion holds

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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.