| 1994 |
BMX encodes a nonreceptor tyrosine kinase with PH, SH3, SH2, and catalytic domains; immunoprecipitates from COS cells transfected with BMX contain a tyrosyl-phosphorylated BMX polypeptide (~80 kDa), demonstrating intrinsic kinase activity. |
Molecular cloning, transfection, immunoprecipitation with phosphotyrosine detection |
Oncogene |
Medium |
7970727
|
| 1997 |
BMX (Bmx) induces tyrosine phosphorylation and DNA-binding activity of STAT1, STAT3, and STAT5, and activates STAT-dependent reporter genes independently of endogenous JAK kinases; this activity is selectively inhibited by PKCδ, which blocks STAT1 tyrosine phosphorylation downstream of Bmx. |
Transient transfection in mammalian and insect cells, reporter gene assays, dominant-negative PKC isoforms |
Blood |
High |
9373245
|
| 1998 |
Etk/BMX is an effector of PI3-kinase: PI3-kinase inhibitor wortmannin abolishes IL-6-induced Etk activation, constitutively active p110 activates Etk without IL-6, and dominant-negative p85 blocks IL-6-induced Etk activation; active Etk is required for IL-6-induced neuroendocrine differentiation of prostate cancer cells. |
Pharmacological inhibition (wortmannin), dominant-active/dominant-negative PI3K subunits, dominant-negative Etk overexpression |
Proceedings of the National Academy of Sciences of the United States of America |
High |
9520419
|
| 1998 |
Bmx and Tec activate serum response factor (SRF) in synergy with constitutively active Gα12/13, in a Rho-dependent (C3-sensitive) manner; the kinase and TH domains of Bmx are required for SRF activation; kinase-dead Bmx inhibits Gα12/13-induced and thrombin-induced SRF activation. |
Transient transfection in NIH 3T3 cells, C3 toxin treatment, domain mutants, dominant-negative kinase |
The EMBO journal |
High |
9755164
|
| 1999 |
BMX reconstitutes PLCγ2-dependent signaling (calcium mobilization, ERK/MAPK activation, and apoptosis) in Btk-deficient DT40 B cells, demonstrating functional equivalence to other Tec kinases in BCR signaling; this reconstitution requires PI3K (and implicitly the PH domain), placing BMX downstream of PI3K in B-cell signaling. |
Genetic reconstitution of Btk-deficient DT40 cells, calcium flux, ERK activation assays |
The Journal of biological chemistry |
High |
10224128
|
| 2000 |
v-Src transphosphorylates Etk/BMX at tyrosine 566, inducing subsequent autophosphorylation and increased kinase activity; activated Etk associates with STAT3 in vivo and links Src to STAT3 activation; dominant-negative Etk blocks v-Src-induced STAT3 phosphorylation and substantially reduces v-Src-induced cellular transformation. |
Co-transfection, co-immunoprecipitation, dominant-negative mutants, transformation assays in WB and NIH3T3 cells |
Molecular and cellular biology |
High |
10688651
|
| 2000 |
Bmx is catalytically activated by IL-3 and G-CSF receptors in a PI3K-dependent manner; GFP-Bmx translocates to cellular membranes upon co-expression of constitutively active PI3K; wild-type Bmx expression in 32D myeloid cells promotes apoptosis in the presence of G-CSF, while kinase-dead Bmx allows granulocyte differentiation. |
PI3K inhibitor treatment, GFP-tagged membrane translocation assay, kinase-dead mutant overexpression in myeloid cells |
Oncogene |
High |
10962576
|
| 2001 |
Etk/BMX interacts with FAK through the PH domain of Etk and the FERM domain of FAK; this interaction is required for Etk activation by extracellular matrix proteins and for cell migration; disrupting the Etk-FAK interaction or re-introducing wild-type FAK into FAK-null cells modulates Etk activation and cell migration. |
Co-immunoprecipitation, FAK-null cell complementation, domain mutants, antisense oligonucleotides, migration assays |
Nature cell biology |
High |
11331870
|
| 2001 |
Etk/BMX directly associates with Pak1 via its N-terminal PH domain and phosphorylates Pak1 on tyrosine residues, establishing Pak1 as a substrate; wild-type Etk promotes proliferation and anchorage-independent growth in MCF-7 cells, while kinase-inactive Etk-KQ suppresses these phenotypes in MDA-MB-435 cells. |
Co-immunoprecipitation, GST pulldown, in vitro kinase assay, overexpression and dominant-negative in breast cancer cell lines |
The Journal of biological chemistry |
High |
11382770
|
| 2001 |
Etk/BMX is activated by FAK and Src downstream of bombesin/neuropeptide-coupled G-protein receptors; Etk activation requires FAK and Src but not PI3K in this context; dominant-negative Etk blocks bombesin-induced LNCaP cell growth and androgen receptor transactivation, placing Etk in the FAK→Src→Etk→AR pathway for androgen-independent growth. |
Dominant-negative kinase constructs, pharmacological inhibitors, reporter gene assays, growth assays |
Molecular and cellular biology |
High |
11713275
|
| 2001 |
Native Bmx associates with endogenous caveolin-1 in human umbilical vein endothelial cells; caveolin-1 expression reduces tyrosine phosphorylation of Btk/Bmx in vivo, and the caveolin-1 scaffolding peptide (aa 82–101) suppresses the autokinase activity of purified Btk, identifying caveolin-1 as a negative regulator of Tec kinase activity. |
Co-immunoprecipitation from primary endothelial cells, in vitro kinase assay with scaffolding peptide, transient co-transfection |
The Journal of biological chemistry |
Medium |
11751885
|
| 2001 |
Bmx tyrosine kinase is expressed downstream of activated Tie-2 and VEGFR-1 receptors in arterial endothelium; activated Tie-2 induces tyrosyl phosphorylation of Bmx protein and both Tie-2 and VEGFR-1 stimulate Bmx tyrosine kinase activity; Bmx knockout mice are viable with normal life span, indicating redundancy in vascular development. |
lacZ knock-in mouse, co-expression and kinase activity assays downstream of Tie-2/VEGFR-1 |
Molecular and cellular biology |
High |
11416142
|
| 2002 |
Etk/BMX forms a preexisting complex with TNFR2 (not TNFR1) in a ligand-independent manner through multiple Etk domains (PH, TH, SH2) and the C-terminal 16 aa of TNFR2; TNF activates Etk specifically via TNFR2; TRAF2 is not involved in this activation; constitutively active Etk enhances, and dominant-negative Etk blocks, TNF-induced endothelial cell migration and tube formation. |
Co-immunoprecipitation, TNFR2-specific agonist, TNFR2-deficient cells, domain mapping, migration/tube formation assays |
Molecular and cellular biology |
High |
12370298
|
| 2002 |
Etk/BMX selectively activates RhoA (but not Cdc42 or Rac1) through its PH domain; Etk and RhoA co-translocate to the plasma membrane and form a complex upon serum stimulation; Etk disrupts RhoA–Rho-GDI interaction, promoting RhoA membrane translocation and downstream stress fiber formation. |
Co-immunoprecipitation, GFP-tagged localization, GDI dissociation assay, PH-domain mutants, stress fiber assay |
The Journal of biological chemistry |
High |
12023958
|
| 2002 |
Etk/BMX interacts with RUFY1 (a RUN/FYVE domain-containing endosomal protein) through Etk's SH3 and SH2 domains; Etk phosphorylates RUFY1 on tyrosine, and phosphorylation is required for RUFY1 endosomal localization; Etk overexpression increases plasma membrane EGFR and delays EGF-induced receptor endocytosis. |
Yeast two-hybrid, co-immunoprecipitation, in vitro kinase assay, subcellular localization (EEA1 co-localization), EGFR endocytosis assay |
The Journal of biological chemistry |
Medium |
11877430
|
| 2003 |
Bmx/Etk interacts with the docking protein p130Cas at membrane ruffles; Bmx enhances tyrosine phosphorylation of Cas and Cas–Crk complex formation; a Bmx mutant that fails to interact with Cas fails to induce cell migration; dominant-negative Cas inhibits Bmx-induced membrane ruffling and cell migration, establishing the Bmx→Cas→Crk axis in actin remodeling and motility. |
Co-immunoprecipitation, co-localization at membrane ruffles, phosphorylation assay, mutant Bmx and dominant-negative Cas, haptotactic migration assay |
The Journal of biological chemistry |
High |
12832404
|
| 2003 |
TNF induces coordinated phosphorylation and complex formation between Etk and VEGFR2, resulting in reciprocal transactivation; Etk phosphorylation at Tyr-566 directly mediates recruitment of the PI3K p85 subunit; Etk-deficient endothelial cells show blunted TNF-induced VEGFR2, Akt activation, and cell migration, independently of VEGF-induced VEGFR2 signaling. |
VEGFR2 inhibitors, co-immunoprecipitation, site-specific mutants (Tyr-566), Etk-null endothelial cells, migration assays |
The Journal of biological chemistry |
High |
14532277
|
| 2004 |
Etk/BMX is physically associated with p53 through the SH3 domain of Etk and the proline-rich domain of p53; p53 induction by DNA damage inhibits Etk activity; Etk inhibits p53 transcriptional activity and its interaction with mitochondrial BAK; the interaction is bidirectional, with each protein inhibiting the other's activity. |
SH3 domain array screening, co-immunoprecipitation, kinase activity assay, reporter gene assay, siRNA knockdown, apoptosis assay |
The Journal of biological chemistry |
High |
15355990
|
| 2001 |
Caspase cleavage of Etk/BMX generates a C-terminal fragment (containing intact SH2 and kinase domains but lacking the PH and SH3 domains) with ~4-fold higher kinase activity than full-length Etk; ectopic expression of this fragment sensitizes PC3 cells to apoptosis-inducing stimuli. |
In vitro translation with caspase incubation, recombinant caspases, kinase activity assay, ectopic fragment expression with apoptosis readout |
The Journal of biological chemistry |
High |
11278797
|
| 2006 |
The 44 kDa Pim-1 isoform directly binds the SH3 domain of Etk/BMX through its N-terminal proline-rich motif, activating Etk kinase activity, possibly by competing with tumor suppressor p53 for SH3 binding; this interaction confers resistance to chemotherapeutic drugs in prostate cancer cells. |
Co-immunoprecipitation, GST pulldown, kinase activity assay, ectopic overexpression in prostate cancer cell lines |
Oncogene |
Medium |
16186805
|
| 2006 |
Bmx/Etk is required for ischemia-mediated arteriogenesis and angiogenesis in vivo; Bmx-KO mice show markedly reduced, and Bmx-transgenic mice (constitutively active Bmx under Tie-2 promoter) show enhanced, clinical recovery and limb perfusion after ischemia; bone marrow transplantation shows Bmx in bone marrow-derived cells is critical for early ischemic tissue remodeling; Bmx mediates TNFR2/VEGFR2 angiogenic signaling. |
Bmx-KO and Bmx-transgenic mice, hindlimb ischemia model, bone marrow transplantation, immunofluorescence, signaling assays |
The Journal of clinical investigation |
High |
16932810
|
| 2007 |
Bmx regulates TLR4-induced IL-6 production in human macrophages by stabilizing IL-6 mRNA via the 3' UTR through a p38 MAPK-independent pathway; Btk knockdown reduces TNFα but not IL-6, distinguishing Bmx's specific role in IL-6 regulation. |
siRNA knockdown, cytokine ELISA, mRNA stability assay targeting the 3' UTR, p38 inhibitor treatment |
Blood |
Medium |
18025155
|
| 2008 |
BMX is required for phosphorylation of p38 MAPK and JNK, and activation of NF-κB downstream of TNF, IL-1β, and TLR agonists; BMX acts at the level of the TAK1-TAB complex; membrane association via the PH domain (replaceable by myristylation signal) and kinase activity are both required for IL-8 promoter activation; Bmx-KO mice are protected from passive K/BxN serum-transfer arthritis, but kinase-inactive knock-in mice are not protected, revealing kinase-independent scaffolding functions. |
siRNA knockdown, PH domain mutants, myristylation-signal substitution, reporter assay, Bmx-KO and kinase-inactive knock-in mouse arthritis model |
Journal of immunology |
High |
21471444
|
| 2008 |
BMX interacts with FAK and Mal (a TLR adaptor) as well as MyD88, as shown by co-immunoprecipitation in fibroblast-like synoviocytes; LPS and fibronectin-derived protein I/II-induced phosphorylation of Etk and Mal are FAK-dependent; Etk and Mal are required for IL-6 synthesis downstream of the integrin/FAK and MyD88 pathways. |
Co-immunoprecipitation, siRNA knockdown, phosphorylation assay, IL-6 ELISA in rheumatoid fibroblast-like synoviocytes |
Journal of immunology |
Medium |
18292575
|
| 2008 |
BMX forms a complex with STAT3 in pressure-overloaded cardiomyocyte myocardium (detected in detergent-insoluble fractions); RGD-integrin stimulation activates BMX and redistributes it with STAT3 in a JAK2-independent manner; c-Src dominant-negative does not block RGD-stimulated BMX or STAT3 activation, indicating BMX acts independently of Src in this context. |
In vivo pressure-overload model, fractionation, co-immunoprecipitation, dominant-negative adenovirus, in vitro cardiomyocyte RGD stimulation |
International journal of biological sciences |
Medium |
18612371
|
| 2008 |
Bmx is a member of the PKC-ε signaling complex in the heart; Bmx is activated by nitric oxide in rabbit heart concomitant with the late phase of NO-donor-induced cardioprotection; increased Bmx expression induced by NO donors is blocked by PKC inhibition with chelerythrine. |
Functional proteomic analysis of PKC-ε complexes, in vivo rabbit NO-donor treatment, PKC inhibitor (chelerythrine) |
American journal of physiology. Heart and circulatory physiology |
Medium |
15191890
|
| 2008 |
Loss of Bmx prevents pressure overload-induced cardiac hypertrophy and preserves ejection fraction in mice; Bmx-KO mice are resistant to transverse aortic constriction-induced cardiac growth at the organ and cell level, establishing Bmx as a necessary regulator of hypertrophic signaling in the heart. |
Bmx-KO mice, transverse aortic constriction model, echocardiography, histology |
Circulation research |
High |
18988895
|
| 2010 |
Etk/BMX directly interacts with androgen receptor (AR) through its SH2 domain; this interaction prevents AR-Mdm2 association, stabilizing AR under androgen-depleted conditions; Etk overexpression increases AR tyrosine phosphorylation, and Etk is upregulated in prostates in response to androgen ablation. |
Co-immunoprecipitation (domain mapping with SH2), phosphorylation assay, siRNA knockdown, tissue microarray IHC (Pearson correlation), xenograft model |
Cancer research |
High |
20570899
|
| 2011 |
BMX activates STAT3 to maintain self-renewal and tumorigenic potential of glioblastoma stem cells (GSCs); BMX knockdown inhibits STAT3 activation and GSC transcription factor expression; constitutively active STAT3 rescues BMX knockdown effects, placing BMX upstream of STAT3 in GSC maintenance. |
shRNA knockdown, constitutively active STAT3 rescue, intracranial tumor growth assay, neurosphere formation |
Cancer cell |
High |
21481791
|
| 2013 |
BMX preferentially phosphorylates substrates containing a priming phosphotyrosine (pY) at the −1 position (pYY motif); BMX phosphorylates FAK at Tyr577 subsequent to Src-mediated phosphorylation at Tyr576, generating the pYpY activation motif; BMX deficiency (RNAi or KO) impairs FAK and insulin receptor activation loop phosphorylation and downstream AKT Thr308 phosphorylation. |
Positional scanning peptide library, in vitro kinase assay, RNAi, Bmx-KO MEFs and liver tissue, phospho-specific antibodies |
Science signaling |
High |
23716717
|
| 2013 |
BMX covalently and irreversibly modifies Cys496 in the ATP-binding pocket using electrophilic inhibitors (BMX-IN-1), and clinical EGFR inhibitors (e.g., CI-1033) also irreversibly modify BMX at Cys496; this identifies Cys496 as the critical covalent modification site for BMX inhibition. |
Covalent inhibitor design, kinome profiling, structure-based drug design, cell viability assays |
ACS chemical biology |
High |
18667312 23594111
|
| 2015 |
BMX directly associates with BAK in viable cells and phosphorylates a key tyrosine on BAK to maintain it in an inactive conformation; elevated BMX prevents BAK activation in tumor cells treated with chemotherapy, and BMX silencing potentiates BAK activation and sensitizes tumor cells to chemotherapeutic agents. |
Co-immunoprecipitation, in vitro kinase assay for BAK phosphorylation, siRNA knockdown with apoptosis/BAK activation assays |
Cancer research |
High |
25649765
|
| 2015 |
Endothelial Bmx kinase activity is required for angiotensin II-induced cardiac hypertrophy; Bmx-kinase-inactive knock-in mice show significantly reduced Ang II-induced hypertrophy; Ang II stimulates Bmx phosphorylation in endothelial cells and Bmx silencing inhibits downstream STAT3 signaling; Bmx inactivation suppresses Ang II-induced mTORC1 pathway activation. |
Kinase-inactive Bmx knock-in mice, Ang II infusion, Bmx siRNA in endothelial cells, genome-wide transcriptomic profiling, phospho-signaling assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
26430242
|
| 2016 |
BMX promotes N-end rule proteasomal degradation of the pro-apoptotic caspase-generated BMX C-terminal fragment via its N-terminal tryptophan; phosphorylation of Tyr566 on this fragment inhibits its N-end rule degradation and is required for its pro-apoptotic function. |
In-cell pulse-chase/metabolic stability assay, proteasome inhibitors, N-end rule pathway analysis, phospho-mutant constructs in PC3 cells |
The Journal of biological chemistry |
Medium |
27601470
|
| 2017 |
Hypoxia induces HIF-dependent BMX upregulation in AML cells; BMX acts as a compensatory prosurvival kinase through STAT5 signaling during FLT3 inhibition with sorafenib; pharmacological inhibition or genetic knockout of BMX reverses this resistance phenotype in FLT3-ITD+ cell lines. |
RNA-Seq of patient samples, in vivo murine FLT3-ITD model, hypoxia in vitro experiments, pharmacological BMX inhibition, genetic KO, pSTAT5 signaling assay |
The Journal of clinical investigation |
High |
29227282
|
| 2018 |
BMX inhibition by ibrutinib disrupts BMX-mediated STAT3 activation in GSCs; BMX bypasses SOCS3-mediated inhibition of JAK2 to activate STAT3, whereas neural progenitor cells (lacking BMX) are regulated by SOCS3, providing the molecular basis for GSC-selective targeting. |
Ibrutinib pharmacological inhibition, shRNA, SOCS3 epistasis analysis, phospho-signaling assays, intracranial tumor models combined with radiotherapy |
Science translational medicine |
High |
29848664
|
| 2018 |
AR directly suppresses BMX gene expression by binding to the BMX gene locus; upon androgen deprivation, BMX expression increases and contributes to castration-resistant prostate cancer by phosphorylating the pYY activation loop motif of multiple receptor tyrosine kinases; ibrutinib and BMX-IN-1 inhibition markedly enhanced response to castration in xenograft models. |
AR ChIP demonstrating binding at BMX locus, anti-pYpY substrate antibody validation, RNAi KD, xenograft model with castration + BMX inhibitor |
Cancer research |
High |
30012673
|
| 2020 |
BMX specifically phosphorylates PAR1 (protease-activated receptor-1), promoting PAR1 internalization and signal deactivation in endothelial cells; BMX loss increases thrombin-mediated endothelial permeability 2–3 fold; pharmacological PAR1 antagonism rescues BMX-KO-mediated vascular leakage in sepsis models. |
BMX-KO mice, cecal ligation/puncture sepsis model, transendothelial resistance assay, biochemical PAR1 phosphorylation and internalization assays, PAR1 antagonist rescue |
Circulation research |
High |
31910739
|
| 2021 |
Fas signaling in adipocytes promotes NF-κB and MAPK pathway activation and inflammatory cytokine release (TNFα, IL-6) through a direct interaction between Fas (at Tyr189) and the SH2 domain of Bmx; disrupting this Fas–Bmx interaction attenuates adipocyte inflammation. |
Co-immunoprecipitation, site-specific Fas and Bmx SH2 mutants, cytokine ELISA, NF-κB/MAPK signaling assays |
Cancer letters |
Medium |
34536556
|
| 2023 |
BMX directly interacts with 3β-hydroxysteroid dehydrogenase-1 (3βHSD1) and phosphorylates it at tyrosine 344 (Y344); Y344 phosphorylation is required for 3βHSD1 catalytic activity and generation of androgen biosynthesis intermediates (Δ4, 3-keto substrates for 5α-reductase and aromatase); in vivo blockade of Y344 phosphorylation inhibits castration-resistant prostate cancer growth. |
Co-immunoprecipitation, site-directed mutagenesis (Y344), in vitro kinase assay, patient tissue phosphorylation analysis, in vivo CRPC model |
The Journal of clinical investigation |
High |
36647826
|
| 2010 |
Etk/BMX binds to PAR1 C-tail residues 378–384 via its PH domain, enabling subsequent Shc association; the Etk-PAR1 interaction is required for PAR1-induced invasion through Matrigel; knockdown of Etk inhibits PAR1-induced MDA-MB-435 cell migration, establishing the PAR1 C-tail as a scaffold for Etk/Shc complex assembly. |
Antibody array, co-immunoprecipitation, PAR1 C-tail Y/A and 7A mutants, Matrigel invasion assay, siRNA knockdown, in vivo xenograft |
PloS one |
High |
20559570
|
| 2004 |
Bmx is a downstream effector of Rap1 in VEGF-induced endothelial cell signaling; VEGF treatment induces formation of a Rap1/Bmx complex (confirmed by co-immunoprecipitation); VEGF promotes Bmx recruitment to CAS scaffolding protein; dominant-negative Rap1 prevents Rap1/Bmx complex formation; Bmx kinase inhibition blocks VEGF-induced cell migration. |
Antibody array, co-immunoprecipitation, dominant-negative Rap1, Bmx kinase inhibitor, migration assay |
Biochemical and biophysical research communications |
Medium |
15207703
|
| 2020 |
X-ray crystal structure of BMX covalently inhibited at Cys496 reveals key interactions with Lys445 that hamper ATP catalysis and a DFG-out-like inactive conformation; the structure guides design of potent selective BMX inhibitors. |
X-ray crystallography, covalent inhibitor design, molecular dynamics, kinome selectivity profiling, cellular target engagement assay |
RSC chemical biology |
High |
34458764
|