| 2017 |
PKMYT1 is a dual-specificity kinase that phosphorylates CDK1 at both Thr14 and Tyr15 (whereas WEE1 exclusively phosphorylates Tyr15), thereby acting as a negative regulator of CDK1/Cyclin B and restraining G2/M transition. |
Biochemical characterization and review of cell cycle regulation mechanisms; in vitro kinase assays with Thr14/Tyr15 phospho-specific readouts |
Molecules (Basel, Switzerland) |
High |
29168755
|
| 2011 |
PKMYT1 (human Myt1 kinase) phosphorylates only protein substrates, not peptide substrates, indicating a requirement for protein-level substrate recognition for both its Thr and Tyr kinase activities. PKMYT1 is insensitive to staurosporine in a kinase binding assay. |
Fluorescence polarization immunoassay, immunoblotting, in vitro kinase assays with peptide and protein substrates, molecular dynamics simulations |
Bioorganic & medicinal chemistry letters |
Medium |
22189141
|
| 2015 |
PKMYT1 acts redundantly with WEE1 to inhibit Cyclin B-CDK1 activity via CDK1-Y15 phosphorylation and to promote timely completion of mitosis in normal neural stem cells (NSCs). In glioblastoma stem-like cells (GSCs), this redundancy is lost, likely due to oncogenic signaling, causing GBM-specific lethality upon PKMYT1 loss. |
Genome-wide CRISPR-Cas9 knockout screens in GSCs vs NSCs, in vitro and in vivo validation, CDK1-Y15 phosphorylation measurement |
Cell reports |
High |
26673326
|
| 2022 |
CCNE1 amplification creates a synthetic lethal dependency on PKMYT1 kinase activity. PKMYT1 inhibition (with RP-6306) causes unscheduled CDK1 activation selectively in CCNE1-overexpressing cells, promoting early mitosis during DNA synthesis. CCNE1 overexpression disrupts CDK1 homeostasis at least in part through early activation of the MMB-FOXM1 mitotic transcriptional program. |
Genome-scale CRISPR-Cas9 synthetic lethality screens in CCNE1-amplified cell models, selective PKMYT1 inhibitor RP-6306 (orally bioavailable), CDK1 phosphorylation assays, xenograft models, transcriptional program analysis |
Nature |
High |
35444283
|
| 2022 |
RP-6306 is an orally bioavailable and selective PKMYT1 inhibitor identified through structure-based drug design. Crystal structure analysis guided optimization of inhibitor interactions with PKMYT1 active site residues, achieving selectivity over the closely related WEE1 kinase. |
Structure-based drug design, in vitro PKMYT1 kinase assays, ADME profiling, xenograft tumor models |
Journal of medicinal chemistry |
High |
35880755
|
| 2017 |
PKMYT1 promotes hepatocellular carcinoma cell growth and motility by binding to and inactivating GSK3β, thereby activating β-catenin/TCF signaling. |
Co-immunoprecipitation, western blotting, cell viability and migration assays, gene knockdown/overexpression in HCC cell lines |
Experimental cell research |
Low |
28648520
|
| 2019 |
PKMYT1 interacts with MCRS1 protein; immunoprecipitation confirmed the interaction, and immunofluorescence showed co-localization of MCRS1 and PKMYT1 in the cytoplasm of gastric cancer cells. MCRS1 overexpression suppresses PKMYT1 expression and inhibits GC cell proliferation, invasion, and migration. |
Co-immunoprecipitation, immunofluorescence co-localization, yeast two-hybrid (previous study), WEE1 inhibitor rescue experiments |
Cellular signalling |
Low |
30953699
|
| 2020 |
PKMYT1 silencing inhibits G2/M checkpoint-mediated radiation resistance in lung adenocarcinoma: knockdown of PKMYT1 abrogates IR-induced G2/M phase arrest and increases sensitivity of cancer cells to radiation. |
siRNA knockdown of PKMYT1, colony survival assay, cell cycle analysis by flow cytometry after ionizing radiation |
Frontiers in genetics |
Medium |
32411179
|
| 2021 |
PKMYT1 binds to cyclin A2 (CCNA2) as demonstrated by co-immunoprecipitation; knockdown of PKMYT1 reduces CCNA2 expression and inhibits proliferation, EMT, migration, and invasion in oral squamous cell carcinoma cells. |
Co-immunoprecipitation, shRNA knockdown, CCK-8, colony formation, wound healing, Transwell assays, western blot |
Oncology letters |
Low |
35069872
|
| 2022 |
PKMYT1 demethylation of PKMYT1 mRNA m6A sites is regulated by ALKBH5 (m6A demethylase); ALKBH5 knockdown or demethylase activity mutation upregulates PKMYT1 expression. IGF2BP3 acts as the m6A reader that stabilizes PKMYT1 mRNA via its m6A modification site. |
MeRIP-seq, MeRIP-qRT-PCR, RNA pulldown, mass spectrometry, RNA immunoprecipitation (RIP), RNA-seq, in vivo lung metastasis model |
Molecular cancer |
Medium |
35114989
|
| 2022 |
PKMYT1 directly binds AKT1 and abrogates AKT1 kinase activation in lung adenocarcinoma cells; this tumor-suppressive function depends on PKMYT1's tyrosine and threonine kinase activity. |
Co-immunoprecipitation (direct binding assay), RNA-seq, AKT pathway inhibitors, knockdown/overexpression with proliferation and invasion assays |
Cellular oncology (Dordrecht, Netherlands) |
Low |
36350496
|
| 2023 |
Combined WEE1 and PKMYT1 inhibition synergistically promotes CDK activation, exacerbates DNA replication stress and replication catastrophe, and activates inflammatory STAT1 signaling in ovarian cancer cells, demonstrating that PKMYT1 and WEE1 are synthetic lethal partners. |
Small-molecule inhibitor combinations in ovarian cancer cells and organoid models, CDK activity assays, DNA damage markers, STAT1 pathway analysis |
NAR cancer |
Medium |
37325550
|
| 2023 |
ELF3 transcription factor upregulates PKMYT1 expression by binding the PKMYT1 promoter region in gallbladder cancer cells, thereby promoting phosphorylation of CDK1 and inducing gemcitabine resistance via the ELF3/PKMYT1/CDK1 axis. |
Luciferase reporter assay, ChIP assay, western blot for CDK1 phosphorylation, shRNA knockdown, in vivo xenograft models |
Cellular oncology (Dordrecht, Netherlands) |
Medium |
36988891
|
| 2023 |
TEAD4 transcriptionally activates PKMYT1 by binding its promoter; TEAD4-driven PKMYT1 upregulation facilitates glycolysis and proliferation in gastric cancer cells. |
Dual-luciferase assay, chromatin immunoprecipitation (ChIP), JASPAR database prediction, CCK-8, colony formation, extracellular acidification rate measurement |
Molecular and cellular probes |
Medium |
37729973
|
| 2024 |
PKMYT1 inhibition in CCNE1-amplified cancers functions in addition to its canonical CDK1-phosphorylating role by regulating PLK1 expression and phosphorylation, promoting PDAC tumorigenesis. TP53 function and PRKDC activation modulate sensitivity to PKMYT1 inhibition. |
Genome-wide CRISPR screens, PLK1 expression/phosphorylation analysis, in vitro cell line models, xenograft models (CDX and PDX), pharmacological PKMYT1 inhibition |
EMBO molecular medicine |
Medium |
38570712
|
| 2024 |
Low-molecular weight cyclin E (LMW-E) specifically upregulates PKMYT1 expression and protein stability compared to full-length cyclin E, increasing CDK1 phosphorylation. PKMYT1 inhibition in this context accelerates premature mitotic entry, inhibits replication fork restart, and enhances DNA damage and apoptosis in an LMW-E-dependent manner. |
Tumor sample proteogenomics, cell line LMW-E expression, PKMYT1 inhibitor RP-6306, CDK1 phosphorylation assays, replication fork assays, DNA damage markers, LMW-E transgenic murine mammary tumor models, PDX models |
Cancer research |
High |
39186665
|
| 2024 |
X-ray co-crystal structure of PKMYT1 with inhibitor compounds confirmed that binding interactions with residues Asp251 and Tyr121 in the PKMYT1 active site are critical for potency and selectivity over WEE1. |
X-ray crystallography (co-crystal structure of PKMYT1 with inhibitors), structure-activity relationship analysis |
Journal of medicinal chemistry |
High |
39163619
|
| 2023 |
Molecular dynamics simulations and binding free energy calculations identified that the non-conserved gatekeeper residue Thr187 in PKMYT1 (vs Asn376 in WEE1) is a critical determinant of binding selectivity for RP-6306 toward PKMYT1 over WEE1. A water-mediated hydrogen bond between RP-6306 and Gly191 at the PKMYT1 hinge domain is absent in the WEE1 complex. |
Molecular docking, multiple microsecond-length molecular dynamics simulations, end-point free energy calculations (MM-PBSA/GBSA), per-residue free energy decomposition |
Journal of biomolecular structure & dynamics |
Low |
37345529
|
| 2025 |
PKMYT1 phosphorylates nucleophosmin 1 (NPM1) at the S260 site in osteosarcoma cells. This phosphorylation competitively impairs NPM1 SUMOylation, which in turn interferes with recruitment of BRCA1, RAP80, and RAD51 to double-strand break sites, thereby impairing DSB repair and promoting chemoresistance to cisplatin. |
Kinome-wide CRISPR screen, transcriptome sequencing, phosphorylation site mapping (NPM1-S260), SUMOylation assay, co-immunoprecipitation for BRCA1/RAP80/RAD51 recruitment, in vitro functional assays, patient-derived clinical specimens |
Signal transduction and targeted therapy |
Medium |
40393983
|
| 2025 |
Meisoindigo (Mei) forms a selective and reversible covalent bond with the Cys301 residue of PKMYT1, acting as a molecular glue that enhances the interaction between PKMYT1 and the E3 ubiquitin ligase TRIM25 by approximately 30-fold. This triggers K48-linked polyubiquitination and proteasomal degradation of PKMYT1. |
Activity-based protein profiling (ABPP), covalent binding characterization, ubiquitination assays (K48-linkage), co-immunoprecipitation of PKMYT1-TRIM25 interaction, proteasome inhibitor rescue experiments, xenograft model |
Advanced science (Weinheim, Baden-Wurttemberg, Germany) |
Medium |
40279509
|
| 2025 |
USP49 deubiquitinase interacts with PKMYT1 and limits its ubiquitination and subsequent proteasomal degradation, thereby stabilizing PKMYT1 protein levels in triple-negative breast cancer cells. Overexpression of PKMYT1 rescues malignant phenotypes in USP49-deficient TNBC cells. |
Co-immunoprecipitation of USP49-PKMYT1, ubiquitination assays, siRNA knockdown, rescue overexpression, cell viability and cell cycle assays |
Biochemical and biophysical research communications |
Low |
41443044
|
| 2025 |
PKMYT1 inhibition (RP-6306) activates the cGAS-STING pathway and potentiates type I and II interferon signaling, upregulating chemokines CCL5 and CXCL10, thereby enhancing CD8+ T cell infiltration and synergizing with PD-L1 blockade in castration-resistant prostate cancer models. |
PCa cell lines and syngeneic mouse models, single-cell RNA sequencing, pharmacological PKMYT1 inhibition (RP-6306), flow cytometry for T cell infiltration, cGAS-STING pathway assays, combination with anti-PD-L1 |
Journal for immunotherapy of cancer |
Medium |
41617394
|
| 2026 |
PKMYT1 kinase activity increases during anaphase and plays a novel mitotic role distinct from WEE1: chemical inhibition of PKMYT1 induces premature anaphase leading to chromosome segregation errors (chromatin bridges and micronuclei), which activate the cGAS-STING pathway. PKMYT1 also contributes to maintaining spindle assembly checkpoint integrity, as its inhibition promotes mitotic slippage in the presence of anti-microtubule drugs. PKMYT1 thus acts alongside Cyclin B1 degradation to control CDK1-Cyclin B1 activity during metaphase-to-anaphase transition. |
Chemical inhibition of PKMYT1 with live-cell imaging, chromosome segregation error analysis, micronuclei and chromatin bridge quantification, cGAS-STING pathway activation assays, spindle assembly checkpoint assays with anti-microtubule drugs |
EMBO reports |
High |
42243523
|
| 2026 |
PKMYT1 directly activates Snail transcription in clear cell renal cell carcinoma by upregulating FoxM1, which represses E-cadherin and activates vimentin expression, thereby inducing EMT. Inhibition of the FoxM1/Snail/EMT pathway reversed PKMYT1-induced metastasis in mice. |
Exogenous PKMYT1 modulation, in vitro migration/invasion assays, EMT marker western blot, in vivo mouse metastasis model, FoxM1/Snail pathway analysis |
Cell biology international |
Low |
41693360
|
| 2026 |
Allosteric inhibitor P29 binds a previously unknown cryptic allosteric site on PKMYT1, inducing conformational rearrangement of the P-loop and inhibiting PKMYT1 through a mixed ATP-competitive and non-competitive mechanism. A closely related analogue P32 engages PKMYT1 in the ATP binding pocket despite similar structure. |
X-ray crystallography, kinetic mechanistic assays (ATP competition), cell-based engagement assays, computational structural modeling (AlphaFold2/3, MD simulations) |
Journal of the American Chemical Society |
High |
42227652
|
| 2025 |
Rb1 loss in breast cancer creates synthetic lethality with combined ATR and PKMYT1 coinhibition. Rb1 deficiency impairs double-strand DNA repair by attenuating homologous recombination and non-homologous end joining, leading to replication fork collapse. Coinhibition of ATR (S-G2 checkpoint) and PKMYT1 (G2-M checkpoint) leads to replication stress, premature mitotic entry, and DNA damage accumulation, with JNK/p38 stress response pathway activation driving apoptosis. |
In vitro coinhibition in Rb1-deficient vs proficient cell lines, genetic Rb1 knockdown/re-expression, PDX in vivo models, γH2AX/Ki67 biomarker analysis, HR and NHEJ repair assays, proteogenomic pathway analysis |
Science translational medicine |
High |
41442499
|
| 2024 |
E2F7 transcription factor directly activates PKMYT1 transcription by binding to the PKMYT1 promoter in gastric cancer cells; the E2F7/PKMYT1 axis promotes proliferation and reduces adriamycin (ADM) sensitivity through MAPK pathway activation. |
Dual-luciferase reporter assay, chromatin immunoprecipitation (ChIP), western blot (ERK/p-ERK), CCK-8 assay, IC50 determination, rescue experiments |
Revista de investigacion clinica |
Medium |
38253021
|
| 2024 |
PKMYT1 promotes SREBP2-mediated expression of cholesterol biosynthesis enzymes through activating the TNF/TRAF1/AKT pathway in triple-negative breast cancer cells. |
PKMYT1 knockdown, SREBP2 activity assays, cholesterol biosynthesis enzyme expression analysis, TNF/TRAF1/AKT pathway western blot, atorvastatin sensitivity assays |
PeerJ |
Low |
39011373
|
| 2025 |
PKMYT1 inhibition with RP-6306 induces premature mitotic entry, causing DNA damage and mitotic catastrophe that triggers PANoptosis (concurrent apoptosis, pyroptosis, and necroptosis) in pancreatic cancer cells. |
PKMYT1 inhibitor RP-6306, in vitro cell death assays, PANoptosis marker analysis (apoptosis/pyroptosis/necroptosis), in vivo xenograft models, combination with gemcitabine |
Cell death & disease |
Medium |
40664640
|