| 1994 |
BMX encodes a nonreceptor tyrosine kinase containing PH, SH3, SH2, and catalytic domains; immunoprecipitates of COS cells transfected with BMX and NIH3T3 cells expressing a BMX retrovirus contained a tyrosyl-phosphorylated BMX polypeptide, demonstrating intrinsic kinase activity. |
Transfection, immunoprecipitation, tyrosine phosphorylation assay |
Oncogene |
Medium |
7970727
|
| 1997 |
BMX induces tyrosine phosphorylation and DNA-binding activity of STAT1, STAT3, and STAT5, and activates STAT1- and STAT5-dependent transcriptional reporter genes, independent of JAK kinase activation; this BMX-mediated STAT activation is specifically inhibited by PKCδ but not PKCβ1, PKCε, or PKCζ. |
Transient transfection in mammalian and insect cells, EMSA, reporter gene assay, co-expression with PKC isoforms |
Blood |
High |
9373245
|
| 1998 |
BMX (Etk) is an effector of PI3-kinase: wortmannin blocked IL-6-induced Etk activation, constitutively active p110 activated Etk in absence of IL-6, and dominant-negative p85 blocked IL-6-induced activation; IL-6-induced neuroendocrine differentiation of LNCaP prostate cancer cells was abrogated by dominant-negative Etk. |
Pharmacological inhibition (wortmannin), dominant-negative/constitutively active PI3K subunit overexpression, cellular differentiation assay |
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 manner (C3-sensitive); kinase and TH domains of BMX are required for SRF activation; kinase-deficient Bmx inhibits Gα12/13- and thrombin-induced SRF activation. |
Transient transfection, reporter gene assay, C3 toxin treatment, dominant-negative mutant expression |
The EMBO journal |
High |
9755164
|
| 1999 |
BMX reconstituted PLCγ2-dependent signaling (calcium mobilization, ERK/MAPK activation, apoptosis) in Btk-deficient DT40 B cells, demonstrating a common Tec-kinase role as amplifier of PLCγ2-dependent signal transduction. |
Genetic reconstitution in Btk-deficient DT40 cells, calcium flux assay, ERK activation assay |
The Journal of biological chemistry |
High |
10224128
|
| 1999 |
Etk/BMX protects prostate cancer cells from apoptosis induced by PDT or thapsigargin; PI3K inhibitor LY294002 abolished Etk activity and increased apoptosis; dominant-negative Etk increased apoptosis, while Etk overexpression reduced it. |
Overexpression/dominant-negative Etk in LNCaP cells, pharmacological PI3K inhibition, PARP cleavage assay, DNA fragmentation |
Oncogene |
Medium |
10362360
|
| 2000 |
BMX is catalytically activated by IL-3 and G-CSF receptors in a PI3K-dependent manner; GFP-tagged Bmx translocated to cellular membranes upon co-expression of constitutively active PI3K; overexpression of wild-type Bmx in 32D cells induced apoptosis with G-CSF, while kinase-dead Bmx allowed granulocytic differentiation. |
Kinase activity assay, GFP-live cell imaging/membrane translocation, PI3K inhibitors, overexpression of WT vs. kinase-dead Bmx in myeloid progenitor cells |
Oncogene |
High |
10962576
|
| 2001 |
Etk/BMX directly associates with Pak1 via its N-terminal PH domain and phosphorylates Pak1 on tyrosine residues; this interaction was demonstrated by coimmunoprecipitation and GST-pulldown; Etk expression increased proliferation and anchorage-independent growth in breast cancer cells. |
Transient transfection, co-immunoprecipitation, GST-pulldown, in vitro kinase assay, anchorage-independent growth assay |
The Journal of biological chemistry |
High |
11382770
|
| 2001 |
Etk/BMX is required for neuropeptide (bombesin/neurotensin)-induced androgen-independent growth of LNCaP prostate cancer cells; Etk activation requires FAK and Src but not PI3K; dominant-negative Etk blocks bombesin-induced growth and AR activation. |
Dominant-negative kinase overexpression, reporter gene assay (PSA promoter/ARE), AR transactivation assay |
Molecular and cellular biology |
Medium |
11713275
|
| 2001 |
Native BMX associates with endogenous caveolin-1 in primary human umbilical vein endothelial cells; caveolin-1 expression reduces tyrosine phosphorylation of BMX/Btk family members; caveolin-1 scaffolding peptide suppresses the autokinase activity of purified recombinant Btk (functional model for BMX). |
Co-immunoprecipitation of endogenous proteins in HUVECs, transient transfection, in vitro kinase assay with caveolin-1 scaffolding peptide |
The Journal of biological chemistry |
Medium |
11751885
|
| 2001 |
Bmx is expressed downstream of Tie-2 and VEGFR-1 in arterial endothelial cells; activated Tie-2 induced tyrosyl phosphorylation of Bmx protein and both Tie-2 and VEGFR-1 stimulated Bmx tyrosine kinase activity; Bmx knockout mice were viable without obvious phenotype, indicating a redundant role. |
Bmx knock-in/knockout mice (lacZ reporter), receptor activation assays, kinase activity assay |
Molecular and cellular biology |
High |
11416142
|
| 2001 |
Etk/BMX is proteolytically cleaved by caspases during apoptosis, generating a C-terminal fragment (containing SH2 and kinase domains) with ~4-fold higher kinase activity than full-length Etk; ectopic expression of this fragment sensitized PC3 cells to apoptosis. |
In vitro translation with [35S]-methionine, incubation with recombinant caspases/apoptotic extracts, in vitro kinase assay, ectopic expression in PC3 cells |
The Journal of biological chemistry |
High |
11278797
|
| 2002 |
Etk/BMX forms a preexisting complex with TNFR2 in a ligand-independent manner through multiple Etk domains (PH, TH, SH2) and the C-terminal 16 amino acids of TNFR2; TNF activates Etk specifically through TNFR2 (not TNFR1); constitutively active Etk enhanced TNF-induced EC migration and tube formation while dominant-negative Etk blocked these. |
Co-immunoprecipitation, TNFR2-specific agonist, TNFR2-deficient cells, domain-deletion mutants, cell migration/tube formation assay |
Molecular and cellular biology |
High |
12370298
|
| 2002 |
Etk activation alone is sufficient to transcriptionally induce VEGF expression independent of HRE under normoxia; Etk utilizes both MEK/ERK and PI3K/Pak1 pathways to activate VEGF transcription; exogenous VEGF stimulates Etk tyrosine phosphorylation, forming a reciprocal Etk-VEGF autoregulatory loop. |
Northern/Western analysis, transient transfection with reporter genes, pharmacological pathway inhibition, antisense oligonucleotides |
Oncogene |
Medium |
12483534
|
| 2003 |
TNF induces reciprocal activation between Etk and VEGFR2 (transactivation complex); Etk phosphorylation at Tyr566 directly mediates recruitment of the p85 subunit of PI3K; TNF-induced EC migration requires VEGFR2-Etk-PI3K-Akt signaling, and is abolished in Etk-deficient ECs. |
Co-immunoprecipitation, VEGFR2-specific inhibitors, Etk-deficient ECs (genetic deletion), Akt/PI3K inhibitors, EC migration assay |
The Journal of biological chemistry |
High |
14532277
|
| 2003 |
Bmx interacts with p130Cas at membrane ruffles, phosphorylates Cas on tyrosine residues, and promotes Cas-Crk complex formation; a Bmx mutant failing to interact with Cas fails to induce cell migration; dominant-negative Cas blocks Bmx-induced membrane ruffling and cell migration. |
Co-immunoprecipitation, colocalization (membrane ruffles), tyrosine phosphorylation assay, haptotactic migration assay, dominant-negative Cas expression |
The Journal of biological chemistry |
High |
12832404
|
| 2004 |
Etk/BMX physically associates with p53 through its SH3 domain and the proline-rich domain of p53; DNA damage-induced p53 inhibits Etk activity; Etk-p53 interaction (primarily cytoplasmic) leads to bidirectional inhibition of both proteins' activities; Etk inhibition of p53 prevents BAK interaction with mitochondria and confers doxorubicin resistance. |
SH3 domain array screening, co-immunoprecipitation, kinase activity assay, siRNA knockdown, reporter gene assay (p53 transcriptional activity) |
The Journal of biological chemistry |
High |
15355990
|
| 2004 |
EGF treatment induces Etk tyrosine phosphorylation; Etk overexpression potentiates EGF-induced apoptosis associated with STAT1 activation; kinase-domain deletion mutant EtkΔK blocks EGF-induced STAT1 activation and apoptosis; conditionally activated Etk alone (independent of EGF) stimulates STAT1 and induces apoptosis. |
Adenovirus-mediated overexpression, dominant-negative mutant, conditional activation system (ΔEtk:ER fusion), EMSA, reporter gene assay, flow cytometry |
Oncogene |
Medium |
14676838
|
| 2004 |
Bmx is identified as a component of PKC-ε signaling complexes in cardiac tissue (functional proteomic analysis); Bmx is activated by nitric oxide in the heart concomitant with the late phase of cardioprotection; NO donor-induced Bmx expression is blocked by PKC inhibitor chelerythrine. |
Functional proteomics of PKC-ε complexes, in vivo NO donor treatment in rabbits, PKC inhibitor chelerythrine |
American journal of physiology. Heart and circulatory physiology |
Medium |
15191890
|
| 2006 |
Pim-1 44 kDa isoform directly binds the SH3 domain of Etk/BMX via its N-terminal proline-rich motif, activating Etk kinase activity possibly by competing with p53; this interaction confers resistance to chemotherapeutic drugs in prostate cancer cells. |
Co-immunoprecipitation, GST-pulldown, kinase activity assay, drug resistance assay |
Oncogene |
Medium |
16186805
|
| 2006 |
Bmx is required for ischemia-mediated arteriogenesis and angiogenesis in vivo; Bmx-KO mice showed markedly reduced recovery after hindlimb ischemia while constitutively active Bmx transgenic mice showed enhanced recovery; bone marrow transplantation showed Bmx in bone marrow-derived cells plays a critical role in early ischemic tissue remodeling. |
Bmx genetic knockout and transgenic mice, hindlimb ischemia model, bone marrow transplantation, histological quantification of vessels |
The Journal of clinical investigation |
High |
16932810
|
| 2007 |
Bmx is activated by tyrosine phosphorylation downstream of Src and PI3K in PTEN-deficient prostate cancer cells; Bmx associates with ErbB3 in LNCaP cells and heregulin-β1 enhances this interaction and Bmx activity; EGF stimulates a Bmx-EGFR interaction and rapidly increases Bmx kinase activity in a Src-dependent but PI3K-independent manner. |
Co-immunoprecipitation, siRNA knockdown, kinase activity assay, pharmacological inhibitors (Src, PI3K) |
The Journal of biological chemistry |
Medium |
17823122
|
| 2007 |
Bmx regulates TLR4-induced IL-6 production in human macrophages by targeting the IL-6 3' UTR to increase mRNA stabilization via a p38 MAPK-independent pathway; Btk knockdown reduced TNF-α but not IL-6 production, demonstrating distinct roles. |
RNA interference, LPS stimulation, cytokine ELISA, mRNA stability assay |
Blood |
Medium |
18025155
|
| 2008 |
BMX is required for TNF-, IL-1β-, and TLR agonist-induced IL-8 secretion; BMX acts downstream of or at the TAK1-TAB complex level; BMX membrane localization (via its PH domain) is required for IL-8 promoter regulation; genetic deletion of BMX protects from K/BxN serum-transfer arthritis, but kinase-inactive BMX knock-in did not protect, revealing a kinase-independent in vivo function. |
Transient depletion (siRNA), epistasis analysis with TAK1-TAB, PH domain mutants, myristylation rescue, Bmx KO mice and kinase-inactive knock-in, passive K/BxN arthritis model |
Journal of immunology |
High |
21471444
|
| 2008 |
BMX is associated with MyD88, FAK, and Mal in fibroblast-like synoviocytes (by co-immunoprecipitation); LPS and protein I/II induce phosphorylation of Etk/BMX and Mal via a FAK-dependent pathway; knockdown of Bmx or Mal inhibits IL-6 synthesis in response to LPS. |
Co-immunoprecipitation, siRNA knockdown, phosphorylation assays |
Journal of immunology |
Medium |
18292575
|
| 2008 |
BMX is activated by RGD integrin stimulation in adult cardiomyocytes and co-distributes with STAT3 in detergent-insoluble fractions in pressure-overloaded myocardium; BMX and STAT3 form a complex and are co-phosphorylated in vivo without accompanying JAK2 activation; dominant-negative c-Src failed to block RGD-stimulated STAT3 or BMX changes. |
In vivo pressure overload model (feline RVPO), RGD peptide stimulation of cardiomyocytes, subcellular fractionation, co-immunoprecipitation, dominant-negative adenovirus |
International journal of biological sciences |
Medium |
18612371
|
| 2008 |
Loss of Bmx prevents pressure overload-induced cardiac hypertrophy in mice; Bmx-KO mice were resistant to TAC-induced cardiac growth and preserved ejection fraction, establishing Bmx as a necessary mediator of pressure overload hypertrophic signaling. |
Bmx knockout mice, transverse aortic constriction (TAC) model, echocardiography, organ/cell-level hypertrophy quantification |
Circulation research |
High |
18988895
|
| 2008 |
Clinical-stage irreversible EGFR inhibitors (e.g., CI-1033) potently and covalently inhibit Bmx by modifying Cys496 within the ATP-binding pocket. |
Biochemical kinase inhibition assay, sequence alignment, covalent modification analysis |
Bioorganic & medicinal chemistry letters |
Medium |
18667312
|
| 2010 |
Etk/BMX directly interacts with the 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 in prostate cancer cells. |
Co-immunoprecipitation, SH2 domain mapping, phosphorylation assay, androgen-depleted culture, siRNA knockdown |
Cancer research |
Medium |
20570899
|
| 2010 |
Etk/BMX binds PAR1 via its PH domain to a seven-residue region (C378–S384) in the PAR1 C-tail; this binding enables subsequent Shc association; hPar1-7A mutant incapable of Etk binding is unable to drive invasion; Etk knockdown inhibits PAR1-induced cell migration. |
Antibody array, co-immunoprecipitation, domain-deletion and point mutants (Y/A PAR1), Matrigel invasion assay, siRNA knockdown |
PloS one |
Medium |
20559570
|
| 2011 |
BMX activates STAT3 in glioblastoma stem cells (GSCs) to maintain self-renewal and tumorigenic potential; BMX knockdown inhibits STAT3 activation and GSC transcription factor expression; constitutively active STAT3 rescues the effects of BMX knockdown, placing BMX upstream of STAT3. |
shRNA knockdown, constitutively active STAT3 rescue, intracranial tumor growth assay, neurosphere formation |
Cancer cell |
High |
21481791
|
| 2013 |
BMX preferentially phosphorylates substrates with a priming phosphotyrosine at the -1 position (pYY motif); BMX phosphorylates FAK at Tyr577 subsequent to Src-mediated phosphorylation at Tyr576; BMX deficiency (RNAi or genetic KO in MEFs) markedly impairs FAK and insulin receptor kinase domain activation (pYY), as well as downstream Akt Thr308 phosphorylation. |
Positional scanning peptide library screening, in vitro kinase assay, RNAi, Bmx KO MEFs, Bmx KO mouse liver, phospho-specific antibodies |
Science signaling |
High |
23716717
|
| 2013 |
BMX covalently modifies Cys496 in a selective and irreversible manner; structure-based drug design yielded BMX-IN-1 (irreversible inhibitor) with nanomolar potency against Tel-BMX-transformed cells; kinome profiling confirms selectivity. |
Structure-based drug design, kinome profiling, covalent modification assay, cell proliferation assay |
ACS chemical biology |
Medium |
23594111
|
| 2015 |
BMX associates with BAK in viable cells and phosphorylates a key tyrosine residue on BAK needed to maintain it in an inactive conformation; elevated BMX prevents BAK activation upon chemotherapy treatment; BMX silencing potentiates BAK activation and renders tumor cells hypersensitive to chemotherapeutic agents. |
Co-immunoprecipitation, kinase assay (BAK phosphorylation), siRNA knockdown, BAK activation assay, drug sensitivity assay |
Cancer research |
High |
25649765
|
| 2015 |
Angiotensin II-induced cardiac hypertrophy is significantly reduced in Bmx KO and kinase-inactive Bmx knock-in mice; Ang II increases Bmx phosphorylation in endothelial cells; Bmx silencing inhibits downstream STAT3 signaling in endothelial cells; Bmx inactivation suppresses mTORC1 pathway activation by Ang II; human cardiac endothelial cells but not cardiomyocytes express abundant Bmx, indicating an endothelial-cardiomyocyte cross-talk mechanism. |
Bmx KO and kinase-inactive knock-in mice, Ang II infusion, genome-wide transcriptomics, Bmx siRNA in endothelial cells, mTORC1/STAT3 phosphorylation assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
26430242
|
| 2016 |
Phosphorylation of tyrosine 566 of the caspase-generated C-terminal BMX fragment relatively inhibits its proteasomal degradation via the N-end rule pathway; the cleaved BMX fragment has an N-terminal tryptophan that targets it for N-end rule degradation; pY566 is required for the pro-apoptotic function of the fragment. |
Metabolic stability assay, proteasome inhibitors, site-directed mutagenesis (Y566), caspase cleavage in PC3 cells, N-end rule reporter assays |
The Journal of biological chemistry |
Medium |
27601470
|
| 2018 |
BMX bypasses SOCS3-mediated inhibition of JAK2 to maintain STAT3 activation in GSCs; ibrutinib disrupts BMX-mediated STAT3 activation in GSCs but not in neural progenitor cells (which lack BMX and dampen JAK2/STAT3 via SOCS3); ibrutinib inhibits GBM growth and potentiates radiotherapy. |
Ibrutinib pharmacological inhibition, SOCS3 expression analysis, JAK2/STAT3 phosphorylation assays, GSC vs. NPC comparison, intracranial tumor models |
Science translational medicine |
High |
29848664
|
| 2018 |
AR directly suppresses BMX gene expression by binding to the BMX gene; BMX expression rapidly increases following androgen deprivation; BMX contributes to CRPC by phosphorylating the pYY activation loop motif of multiple receptor tyrosine kinases; a BMX substrate-specific anti-pYpY antibody confirmed in vivo pYY substrate phosphorylation correlated with BMX expression. |
AR ChIP, androgen deprivation/castration models, cell line and xenograft CRPC models, BMX-IN-1 and ibrutinib treatment, phospho-specific antibody (anti-pYpY) |
Cancer research |
High |
30012673
|
| 2019 |
BMX localizes to the nucleus of endothelial cells via its SH3 domain; nuclear BMX (but not cytoplasm-targeted BMX) promotes Vegfr2 promoter activity by associating with and potentially phosphorylating transcription factor Sp1, increasing Sp1 binding to the Vegfr2 promoter; kinase-inactive BMX-K445R fails to promote Vegfr2 transcription. |
siRNA knockdown, luciferase reporter assay, chromatin immunoprecipitation (ChIP), nuclear/cytoplasmic fractionation, NLS- and NES-tagged BMX constructs, kinase-inactive mutant |
Journal of cellular and molecular medicine |
High |
31642192
|
| 2020 |
BMX directly phosphorylates PAR1 and promotes its internalization and deactivation in endothelial cells; BMX loss increases thrombin-PAR1-mediated endothelial permeability 2- to 3-fold; PAR1 antagonist SCH79797 rescues BMX-KO-mediated vascular leakage in sepsis. |
BMX global KO mice, cecal ligation and puncture sepsis model, electric cell-substrate impedance sensing (ECIS), Miles assay, PAR1 phosphorylation and internalization assays, pharmacological PAR1 antagonist rescue |
Circulation research |
High |
31910739
|
| 2020 |
X-ray crystal structure of BMX covalently inhibited at Cys496 was determined; the structure reveals key interactions with Lys445 (critical for ATP catalysis) and a DFG-out-like inactive conformation. |
X-ray crystallography, covalent inhibitor design, kinase selectivity profiling, molecular dynamics simulations |
RSC chemical biology |
High |
34458764
|
| 2023 |
BMX directly interacts with 3βHSD1 and phosphorylates it at Tyr344; this Y344 phosphorylation is required for 3βHSD1 cellular activity and generation of androgen/estrogen biosynthetic intermediates; in vivo blockade of 3βHSD1 Y344 phosphorylation inhibits CRPC. |
Co-immunoprecipitation of BMX and 3βHSD1, phospho-specific assay for pY344, in vitro kinase assay, patient tissue analysis, in vivo CRPC mouse model |
The Journal of clinical investigation |
High |
36647826
|
| 2021 |
Fas interacts with BMX in adipocytes via the Tyr189 site of Fas and the SH2 domain of BMX; this Fas/BMX complex mediates TNF-α-induced NF-κB and MAPK pathway activation and inflammatory cytokine release in adipocytes. |
Co-immunoprecipitation, site-directed mutagenesis (Fas Tyr189, BMX SH2), cytokine ELISA, NF-κB/MAPK activation assays |
Cancer letters |
Medium |
34536556
|
| 2022 |
In FLT3-ITD+ AML, hypoxia upregulates BMX in an HIF-dependent manner; BMX promotes AKT/mTOR and pSTAT5 signaling as a compensatory survival mechanism during FLT3 inhibition; pharmacological BMX inhibition or genetic KO reduces chemokine secretion and restores gilteritinib sensitivity. |
RNA-Seq of patient samples, murine FLT3-ITD model, in vitro hypoxia experiments, pharmacological BMX inhibition, CRISPR KO, signaling pathway assays (pSTAT5, pAKT) |
Blood advances |
Medium |
35797240
|
| 2022 |
VEGF-A signals through BMX to induce VCAM-1 expression in human aortic endothelial cells; ibrutinib blocks BMX activation by VEGF-A and eliminates VEGF-A-stimulated VCAM-1 expression; ibrutinib inhibits endothelial VCAM-1 and platelet deposition in atherosclerosis-prone nonhuman primate carotid arteries in vivo. |
Ibrutinib and pharmacologically distinct BMX inhibitors in HAECs, flow cytometry, contrast-enhanced ultrasound molecular imaging in vivo (nonhuman primate) |
Cellular and molecular bioengineering |
Medium |
35611166
|