| 2008 |
PKM2, but not PKM1, directly binds tyrosine-phosphorylated peptides via a phosphotyrosine-binding mechanism. Binding of phosphotyrosine peptides to PKM2 releases the allosteric activator fructose-1,6-bisphosphate (FBP), thereby inhibiting PKM2 enzymatic activity and diverting glucose metabolites from energy production to anabolic biosynthesis. |
Proteomic screen for phosphotyrosine-binding proteins, in vitro binding assays, enzymatic activity measurements, metabolic flux analysis |
Nature |
High |
18337815
|
| 2009 |
Oncogenic FGFR1 directly phosphorylates PKM2 at Y105, which disrupts FBP cofactor binding and inhibits formation of active tetrameric PKM2, thereby suppressing pyruvate kinase activity, promoting aerobic glycolysis (Warburg effect), and supporting tumor growth. Y105 phosphorylation is common in human cancers. |
Phosphoproteomic analysis, in vitro kinase assays, Y105F point mutant rescue experiments, xenograft tumor growth assays |
Science Signaling |
High |
19920251
|
| 2011 |
PKM2, but not PKM1, acts as a transcriptional coactivator for HIF-1α. PKM2 interacts directly with the HIF-1α subunit, enhances HIF-1 binding and p300 recruitment to hypoxia response elements, and promotes transactivation of glycolytic target genes. This interaction is potentiated by prolyl hydroxylase PHD3, which hydroxylates PKM2 at P403/P408, enhancing PKM2 binding to HIF-1α. |
Co-immunoprecipitation, in vitro binding assays, mass spectrometry for hydroxyproline detection, anti-hydroxyproline antibody assays, PHD3 knockdown, gene reporter assays |
Cell |
High |
21620138
|
| 2011 |
EGFR activation induces nuclear translocation of PKM2 (but not PKM1), where PKM2 binds c-Src-phosphorylated Y333 of β-catenin at K433. This PKM2–β-catenin interaction is required for recruitment to the CCND1 promoter, removal of HDAC3, histone H3 acetylation, and cyclin D1 expression, thereby promoting tumor cell proliferation. |
Co-immunoprecipitation, nuclear fractionation, chromatin immunoprecipitation, site-directed mutagenesis, reporter assays, in vivo brain tumor model |
Nature |
High |
22056988
|
| 2011 |
Reactive oxygen species (ROS) oxidize PKM2 at C358, inhibiting its enzymatic activity. This inhibition diverts glucose flux from glycolysis into the pentose phosphate pathway, increasing NADPH production and antioxidant capacity. A C358S oxidation-resistant PKM2 mutant sensitizes lung cancer cells to oxidative stress and impairs tumor xenograft formation. |
In vitro enzymatic assays, Cys358Ser mutagenesis, metabolic flux analysis, xenograft tumor model |
Science |
High |
22052977
|
| 2011 |
Acetylation of PKM2 at K305 decreases its enzymatic activity and targets it for chaperone-mediated autophagy and subsequent lysosomal degradation. |
Biochemical acetylation assays, autophagy pathway analysis, lysosome inhibition experiments |
Cold Spring Harbor Symposia on Quantitative Biology |
Medium |
22096030
|
| 2012 |
PKM2 acts as a protein kinase using phosphoenolpyruvate (PEP) as the phosphate donor to phosphorylate STAT3 at Y705 in the nucleus, activating MEK5 transcription and promoting cell proliferation. The dimeric form of PKM2 possesses protein kinase activity whereas the tetrameric form functions as a pyruvate kinase. |
In vitro phosphorylation assays with [32P]-PEP, nuclear localization studies, reporter assays, dimer-locked PKM2 mutant expression |
Molecular Cell |
Medium |
22306293
|
| 2012 |
EGFR-activated ERK2 directly binds PKM2 (via Ile429/Leu431 docking groove interface) and phosphorylates PKM2 at S37. Phospho-S37 recruits PIN1 for cis-trans isomerization, which promotes PKM2 binding to importin α5 and nuclear translocation. Nuclear PKM2 then acts as a coactivator of β-catenin to induce c-Myc expression and upregulate glycolytic genes (GLUT1, LDHA, PKM2) in a positive feedback loop. |
Direct binding assays, in vitro kinase assay, PIN1 co-immunoprecipitation, S37A nuclear translocation-deficient mutant rescue, in vivo brain tumor model |
Nature Cell Biology |
High |
23178880
|
| 2012 |
Nuclear PKM2 directly binds histone H3 and phosphorylates it at T11 upon EGF receptor activation. This phosphorylation causes dissociation of HDAC3 from CCND1 and MYC promoters and subsequent H3K9 acetylation, driving cyclin D1 and c-Myc expression, cell-cycle progression, and tumorigenesis. |
Direct binding assays (Co-IP, pulldown), in vitro kinase assay with recombinant histone H3, ChIP, mutagenesis, in vivo brain tumor model |
Cell |
High |
22901803
|
| 2012 |
Serine is a natural allosteric activator of PKM2. Serine binds directly to PKM2 and activates its pyruvate kinase activity. In serine-deprived cells, PKM2 activity decreases, shifting cells to a fuel-efficient mode that diverts glucose carbon into serine biosynthesis. |
Direct binding assays, in vitro enzymatic activity measurements, metabolic flux analysis in serine-deprived cells |
Nature |
High |
23064226
|
| 2009 |
Three hnRNP proteins — PTB (hnRNPI), hnRNPA1, and hnRNPA2 — bind repressively to sequences flanking exon 9 of PKM pre-mRNA, resulting in exon 10 (PKM2) inclusion and exclusion of exon 9 (PKM1). The oncogenic transcription factor c-Myc upregulates transcription of PTB, hnRNPA1, and hnRNPA2, ensuring a high PKM2/PKM1 ratio in cancer cells. |
RNA splicing assays, RNAi knockdown, RNA immunoprecipitation, promoter reporter assays, glioma tissue analysis |
Nature |
High |
20010808
|
| 2010 |
In PKM2-expressing cells, PEP can directly phosphorylate the glycolytic enzyme PGAM1 at the catalytic histidine H11, providing an alternative glycolytic pathway that decouples ATP production from PEP-mediated phosphotransfer. This histidine-phosphorylated PGAM1 correlates with PKM2 expression in cancer cells and tumors. |
Mass spectrometry identification of phospho-His11-PGAM1, isotope-labeling metabolic flux assays, cancer cell line and tumor tissue correlations |
Science |
High |
20847263
|
| 2011 |
mTOR activates the Warburg effect by inducing PKM2 expression via HIF-1α-mediated transcription and c-Myc/hnRNP-dependent regulation of PKM2 gene splicing. Disruption of PKM2 suppresses mTOR-mediated tumorigenesis. |
mTOR knockdown/inhibitor experiments, HIF-1α reporter assays, PKM splicing RT-PCR, mouse tumor models (TSC2-deficient), xenograft assays |
PNAS |
High |
21325052
|
| 2013 |
JMJD5 directly interacts with PKM2 at the intersubunit interface region of PKM2, hindering PKM2 tetramerization and blocking pyruvate kinase activity. This JMJD5-PKM2 interaction also promotes nuclear translocation of PKM2 and enhances HIF-1α-mediated transactivation of glycolytic target genes. |
Co-immunoprecipitation, in vitro binding/tetramerization assays, pyruvate kinase activity assays, JMJD5 knockdown, ChIP, metabolic measurements |
PNAS |
High |
24344305
|
| 2013 |
PKM2 (but not PKM1) binds the spindle checkpoint protein Bub3 during mitosis and phosphorylates Bub3 at Y207. This phosphorylation is required for Bub3-Bub1 complex recruitment to kinetochores and interaction with Blinkin, essential for correct kinetochore-microtubule attachment, mitotic checkpoint function, accurate chromosome segregation, and cell survival. |
Co-immunoprecipitation, in vitro kinase assay, Y207 phosphorylation-deficient mutant, kinetochore localization studies, chromosome segregation assays, in vivo brain tumor model |
Molecular Cell |
High |
24316223
|
| 2014 |
Aurora B phosphorylates PKM2 (but not PKM1) at T45 during mitosis, which is required for PKM2 localization to the contractile ring and interaction with myosin light chain 2 (MLC2). PKM2 then phosphorylates MLC2 at Y118, priming ROCK2 binding and subsequent ROCK2-dependent S15 phosphorylation of MLC2, regulating cytokinesis. |
Co-immunoprecipitation, in vitro kinase assays, T45 and Y118 phosphorylation mutants, subcellular localization studies, cytokinesis assays, in vivo brain tumor model |
Nature Communications |
High |
25412762
|
| 2014 |
PKM2 interacts with Oct4 in glioma stem cells, and this interaction is implicated in control of glioma spheroid differentiation. Modulation of PKM2/Oct4 complexes (e.g., by DCA) inhibits Oct4-dependent gene expression. |
Co-immunoprecipitation, glioma spheroid differentiation assays, PKM2 silencing, DCA treatment |
Cell Death & Disease |
Medium |
24481450
|
| 2015 |
Using [32P]-PEP labeling with recombinant enzyme and PKM2 genetic deletion in vitro, no PKM2-dependent direct protein phosphorylation could be detected; most observed phospholabeling depended on ADP, not PKM2. This study challenges the proposed role of PKM2 as a direct protein kinase. |
[32P]-PEP phosphorylation assay, recombinant PKM2, PKM2-null cell extracts, in vitro reconstitution |
Molecular Cell |
High |
26300261
|
| 2015 |
PTBP1 upregulation in gemcitabine-resistant pancreatic cancer cells promotes PKM2 isoform expression by increased recruitment to PKM pre-mRNA. Knockdown of PTBP1 reduces PKM2 and restores gemcitabine sensitivity. Switching PKM splicing from PKM2 to PKM1 via antisense oligonucleotides also rescues drug sensitivity. |
RT-PCR splicing assays, PTBP1 RIP, antisense oligonucleotide PKM splice-switching, drug resistance assays, PTBP1 knockdown |
Oncogene |
High |
26234680
|
| 2016 |
EGFR activation triggers c-Src-mediated phosphorylation of Cdc25A at Y59, enabling Cdc25A interaction with nuclear PKM2. Cdc25A dephosphorylates PKM2 at S37, promoting PKM2-dependent β-catenin transactivation, upregulation of glycolytic genes (GLUT1, PKM2, LDHA), and CDC25A itself in a positive feedback loop driving the Warburg effect and tumorigenesis. |
Co-immunoprecipitation, in vitro phosphatase assay (Cdc25A on PKM2), mutagenesis, reporter assays, in vivo brain tumor model |
Nature Communications |
High |
27485204
|
| 2016 |
PKM2-mediated glycolysis promotes inflammasome (NLRP3 and AIM2) activation in macrophages by modulating EIF2AK2 (PKR) phosphorylation. Pharmacological or genetic inhibition of PKM2 or EIF2AK2 attenuates inflammasome activation and IL-1β/IL-18/HMGB1 release. Myeloid cell-specific PKM2 knockout protects mice from septic death. |
Myeloid-specific PKM2 conditional knockout, PKM2 inhibitor pharmacology, EIF2AK2 knockdown, inflammasome activation assays, in vivo endotoxemia/sepsis models |
Nature Communications |
High |
27779186
|
| 2019 |
PKM2 interacts with mitofusin 2 (MFN2) to promote mitochondrial fusion and oxidative phosphorylation while attenuating glycolysis. mTOR phosphorylates MFN2, increasing the PKM2:MFN2 interaction and modulating metabolic balance. Thus an mTOR-MFN2-PKM2 axis coordinates glycolysis and OXPHOS. |
Co-immunoprecipitation, mitochondrial morphology imaging, metabolic flux measurements, mTOR inhibition, MFN2 knockdown |
Protein & Cell |
Medium |
30887444
|
| 2020 |
PKM2 translocates to the nucleus in Th17 cells and interacts with STAT3, enhancing STAT3 activation (phosphorylation) and thereby increasing Th17 cell differentiation. T cell-specific PKM2 deletion impairs Th17 differentiation and ameliorates experimental autoimmune encephalomyelitis (EAE) without affecting metabolic reprogramming or proliferative capacity. |
T cell-specific conditional PKM2 knockout, nuclear fractionation, Co-immunoprecipitation of PKM2-STAT3, EAE in vivo model, flow cytometry for Th17 differentiation |
Journal of Experimental Medicine |
High |
32697823
|
| 2020 |
Pkm2 regulates the cardiomyocyte cell cycle and reduces oxidative stress through anabolic pathways and β-catenin signaling. Cardiomyocyte-specific Pkm2 deletion reduces cardiomyocyte number and myocardial size, while Pkm2 mRNA delivery after myocardial infarction increases cardiomyocyte division, cardiac function, and survival. |
Cardiomyocyte-specific knockout mice, modified mRNA delivery, myocardial infarction model, cell cycle markers, β-catenin pathway analysis |
Circulation |
High |
32078387
|
| 2020 |
Annexin A5 directly interacts with PKM2 at residues D101, L104, and R106, inhibits Y105 phosphorylation, and promotes PKM2 tetramer formation, thereby switching macrophage metabolism from glycolysis to OXPHOS and shifting macrophage polarization from M1 to M2. |
Pull-down, Co-IP, molecular docking, Y105E phosphomimetic mutant, compound 3k inhibitor, in vivo NASH mouse model |
Redox Biology |
Medium |
32863213
|
| 2021 |
PKM2 acts as a histidine kinase using PEP as phosphate donor to phosphorylate PGAM1 at H11. Monomeric and dimeric (but not tetrameric) PKM2 are the efficient forms for this reaction. EGF signaling triggers Src-catalyzed PGAM1 Y119 phosphorylation, which is a prerequisite for PKM2 binding and subsequent PGAM1 H11 phosphorylation, constituting a cancer-specific regulatory mechanism. |
In vitro kinase assays with PEP as donor, mass spectrometry for H11 phosphorylation, PKM2 oligomeric form separation, PGAM1 Y119F and H11A mutants, cell-permeable pY119 peptide disruption, tumor growth assays |
EMBO Journal |
High |
38750259
|
| 2021 |
PKM2 regulates lipid homeostasis via an ER transmembrane protein TMEM33. Loss of PKM2 upregulates TMEM33, which recruits the E3 ligase RNF5 to degrade SCAP, reducing SREBP activation and lipid synthesis. TMEM33 is transcriptionally regulated by NRF1, whose activation is controlled by PKM2 levels. |
PKM2 knockout cells and mice, TMEM33 identification by proteomics, Co-IP for RNF5-SCAP interaction, SREBP reporter assays, TEPP-46 PKM2 activation |
EMBO Journal |
Medium |
34487377
|
| 2022 |
Lactylation of PKM2 at K62 (by lactate) inhibits its tetramer-to-dimer transition, thereby promoting pyruvate kinase activity and reducing nuclear PKM2 distribution, which suppresses the Warburg effect and promotes transition from pro-inflammatory to reparative macrophage phenotype. |
Lactylation proteomics, Co-IP, K62 site mutagenesis, tetramer/dimer ratio assays, enzymatic activity measurement, nuclear fractionation, macrophage polarization assays |
International Journal of Biological Sciences |
Medium |
36439872
|
| 2022 |
FSTL1 binds directly to PKM2 via its FK domain, promotes PKM2 phosphorylation and nuclear translocation, and reduces PKM2 ubiquitination, thereby enhancing PKM2-dependent glycolysis and M1 macrophage polarization promoting liver fibrosis. |
Co-immunoprecipitation, myeloid-specific FSTL1 KO mice, PKM2 activator (DASA-58) rescue, in vitro glycolysis assays, three murine fibrosis models |
Gut |
Medium |
35140065
|
| 2022 |
PKM2 in myeloid/neutrophil cells promotes STAT3 phosphorylation to regulate post-ischemic neuroinflammation. Myeloid-specific PKM2 deletion reduces neutrophil hyperactivation, NET formation, and cerebral thromboinflammation after stroke, improving functional outcomes. Inhibiting PKM2 nuclear translocation with a small molecule recapitulates these effects. |
Myeloid cell-specific PKM2 knockout mice, stroke models, laser speckle imaging, nuclear PKM2 inhibitor, flow cytometry, STAT3 phosphorylation assays |
Blood |
High |
34529778
|
| 2022 |
Celastrol covalently binds to C424 of PKM2 (identified by ABPP, CETSA, and SPR), inhibiting its enzymatic activity and suppressing aerobic glycolysis (Warburg effect) and inflammation in sepsis models. |
Activity-based protein profiling (ABPP), CETSA, SPR, Cys424 point mutagenesis, enzymatic activity assays, in vivo endotoxemia/sepsis models |
Military Medical Research |
Medium |
35596191
|
| 2022 |
PKM2 palmitoylation at C31 (mediated by the palmitoyl acyltransferase zDHHC13) impairs PKM2 tetramerization, inhibits its pyruvate kinase activity, and reduces endothelial glycolysis. C31S mutation or endothelial AAV delivery of C31S PKM2 prevents palmitic acid-induced cardiovascular dysfunction in ApoE−/− mice. |
Palmitoyl-proteomics, C31S point mutant, palmitoylation inhibitor 2-BP, depalmitoylase inhibitor ML349, endothelial AAV gene delivery, cardiovascular function assays, zDHHC13 identification |
Advanced Science |
High |
39665133
|
| 2023 |
PHGDH physically interacts with PKM2, preventing PCAF-catalyzed K305 acetylation and subsequent autophagic degradation of PKM2. PHGDH also facilitates p300-catalyzed PKM2 K433 acetylation, which promotes PKM2 nuclear translocation and stimulates PKM2-dependent H3T11 phosphorylation to regulate transcription of senescence-associated genes, thereby preventing endothelial cell senescence. |
Co-immunoprecipitation, K305 and K433 acetylation mapping, PCAF/p300 knockdown, autophagy inhibitor experiments, H3T11 phosphorylation assays, in vivo aging mouse model |
Nature Communications |
High |
36899022
|
| 2023 |
JMJD4 hydroxylates PKM2 at K66, which facilitates Hsp70-mediated chaperone-mediated autophagy degradation of Pkm2. Loss of Jmjd4 in cardiomyocytes causes Pkm2 accumulation, impaired mitochondrial respiration, and spontaneous dilated cardiomyopathy. Enhancing PKM2 tetramer activity with TEPP-46 rescues Jmjd4-deficient DCM. |
Cardiomyocyte-specific Jmjd4 knockout mice, mass spectrometry for K66 hydroxylation, Hsp70 Co-IP, CMA assays, TEPP-46 pharmacologic rescue, cardiac function assays |
Circulation |
High |
37066795
|
| 2023 |
PKM interacts with ribosomes in a poly-ADP ribosylation (PARylation)-dependent manner and causes translational stalling near lysine- and glutamate-encoding sequences in cytosolic (ER-excluded) mRNAs. PKM-ribosome interaction is regulated by ADP levels, linking carbohydrate metabolism to mRNA translation. |
Polysome fractionation proteomics, eCLIP-seq for PKM-mRNA crosslinks, ribosome footprint protection sequencing, ADP titration experiments, PARylation inhibition |
Nucleic Acids Research |
Medium |
37224531
|
| 2024 |
Nuclear PKM2 functions as a non-canonical RNA-binding protein that specifically binds folded RNA G-quadruplex (rG4) structures in pre-mRNAs. PKM2 occupancy at rG4s prevents binding of repressive RBPs (e.g., HNRNPF) and promotes expression of rG4-containing pre-mRNAs (the 'rG4ome'), supporting epithelial-to-mesenchymal transition and cancer cell invasion. |
eCLIP-seq for nuclear PKM2-RNA interactions, rG4 structure probing, HNRNPF competition assays, PKM2 nuclear accumulation prevention, xenograft invasion model |
Molecular Cell |
High |
39153475
|
| 2024 |
SIRT1 interacts with PKM2 and deacetylates it at K135 and K206, reducing PKM2 enzyme activity and lactate production. This suppresses glial activation in the brain and alleviates Parkinson's disease-like phenotypes in mice. |
Co-immunoprecipitation, in vitro deacetylation assays, K135/K206 site-specific analysis, SIRT1 knockdown/overexpression, PKM2 overexpression/inhibition in PD mouse models |
Cell Reports Medicine |
Medium |
39128469
|
| 2024 |
PKM2 aggregates form in senescent cells and organs of aged mice, impairing its enzymatic activity and glycolytic flux, thereby driving cellular senescence. Small molecules that dissolve PKM2 aggregates alleviate senescence signatures and extend lifespan in aged mice. |
Aggregate detection in senescent cells and aged tissue, enzymatic activity assays, small molecule screen (K35, K27), senescence marker assays, mouse lifespan studies |
Nature Communications |
Medium |
38982055
|
| 2025 |
PINK1 phosphorylates PKM2 at S127, preserving its active tetrameric form, which inhibits nuclear translocation and interaction with β-catenin, resulting in a metabolic shift toward OXPHOS. SIRT3 deacetylates PINK1 to promote this mitophagy-linked PKM2 regulation, collectively protecting against osteoarthritis-associated cartilage degeneration. |
SIRT3/PINK1 conditional KO mice, in vitro kinase assays, S127 mutagenesis, Co-IP of PKM2-β-catenin, metabolic flux assays, PKM2 tetramer/dimer assays |
Bone Research |
Medium |
40087281
|
| 2025 |
March2 (E3 ubiquitin ligase) promotes K33-linked polyubiquitination of PKM2, facilitating PKM2 dimer-to-tetramer conversion. Loss of March2 in vascular smooth muscle cells reduces PKM2 tetramerization, promotes nuclear PKM2 and H3K18 lactylation, and exacerbates aortic aneurysm/dissection via p53-driven apoptosis. TEPP-46 (PKM2 tetramer activator) rescues this pathology. |
March2 smooth muscle cell-specific KO mice, Co-IP, ubiquitination assays with K33-linkage specificity, PKM2 tetramer/dimer assays, H3K18 lactylation analysis, TEPP-46 rescue, aortic dissection model |
Circulation Research |
Medium |
40079144
|