| 1992 |
MacMARCKS (MARCKSL1) is a PKC substrate that binds calmodulin in a phosphorylation-regulated manner; phosphorylation by PKC disrupts calmodulin binding. It also binds actin and shares structural homology with MARCKS including an amino-terminal myristoylation sequence and a central effector/calmodulin-binding/PKC phosphorylation domain. |
Protein purification, cDNA cloning, calmodulin binding assays, PKC phosphorylation assays |
Cell |
High |
1516135 1618855
|
| 1992 |
The F52/MARCKSL1 protein is myristoylated at its N-terminus; it is a PKC substrate with high-affinity calmodulin binding (Kd <3 nM) that is disrupted upon PKC phosphorylation. A 24-amino acid peptide from the effector domain recapitulated these properties (S0.5 for PKC = 173 nM, KH = 5.4). |
E. coli expression, co-expression with N-myristoyltransferase, PKC phosphorylation assay, calmodulin binding assay, peptide substrate kinetics |
The Journal of biological chemistry |
High |
1618855
|
| 1996 |
Deletion of the MacMARCKS gene in mice prevents cranial neural tube closure, resulting in anencephaly, demonstrating an essential role for MARCKSL1 in PKC-dependent actin-based morphogenic movement of the anterior neural plate. |
Gene knockout (homologous recombination), developmental phenotypic analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
8692805
|
| 1996 |
F52/MARCKSL1-deficient mice develop neural tube defects (exencephaly and spina bifida) with partial penetrance (~60% homozygous), and ~10% of heterozygotes also show defects, establishing MARCKSL1 as haploinsufficient for neural tube closure. |
Gene targeting/knockout in mice, developmental phenotype analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
8700893
|
| 1995 |
MacMARCKS concentrates around nascent phagosomes in macrophages during zymosan phagocytosis; expression of effector-domain deletion mutants reduced phagocytic capacity by ~90% without affecting receptor-mediated endocytosis of acetylated LDL, implicating the effector domain in phagocytosis. |
Immunofluorescence microscopy, stable transfection of effector-domain deletion mutants, phagocytosis assay, endocytosis assay |
The Journal of biological chemistry |
Medium |
7629059
|
| 1998 |
MacMARCKS null macrophages phagocytose and spread normally, indicating that MacMARCKS is recruited to phagosomes but is not absolutely required for phagocytosis, contradicting findings from dominant-negative mutant studies. |
MacMARCKS null mouse macrophages (KO), phagocytosis assay, cell spreading assay |
The Journal of biological chemistry |
High |
9837946
|
| 1996 |
MacMARCKS participates in integrin-dependent macrophage spreading and phorbol ester-stimulated spreading requiring multiple integrins; dominant-negative effector-domain mutant blocks macrophage binding to iC3b-opsonized targets (complement receptor 3/beta2 integrin), integrin-dependent paxillin tyrosine phosphorylation, and colocalizes with paxillin at leading-edge membrane ruffles. |
Dominant-negative mutant expression, cell spreading assay, rosette formation assay, immunofluorescence colocalization, paxillin phosphorylation assay |
The Journal of biological chemistry |
Medium |
8662782
|
| 1996 |
MacMARCKS is phosphorylated in a Ca2+-dependent manner upon depolarization in PC12 cells and synaptosomes; it colocalizes with synaptophysin at neurite tips and associates with synaptic vesicles by subcellular fractionation, consistent with a role in integrating Ca2+/calmodulin and PKC signals in neurosecretion. |
Immunoprecipitation, immunofluorescence microscopy, subcellular fractionation, Percoll-purified synaptosomes, KCl depolarization, phorbol ester stimulation |
The Journal of biological chemistry |
Medium |
8557647
|
| 1998 |
MacMARCKS is targeted specifically to the basolateral membrane domain of polarized MDCK cells; the effector domain (24-amino acid basic region with PKC phosphorylation and calmodulin/actin-binding sites) combined with a myristoyl moiety is sufficient for basolateral targeting, and PKC activation displaces it from this location. |
Transfection into polarized MDCK cells, immunofluorescence microscopy, GFP-fusion domain targeting experiments, PKC activation |
Current biology : CB |
Medium |
9637918
|
| 1999 |
Phosphorylated MacMARCKS is required for LFA-1 (beta2 integrin)-mediated cell-cell adhesion in U937 monocytic cells; phosphomimetic (phosphorylated) MacMARCKS enhances adhesion while unphosphorylatable mutant inhibits it, demonstrating that PKC-mediated phosphorylation state determines integrin activation. |
Transfection of wild-type and phosphorylation-site mutants, PMA stimulation, cell-cell adhesion assay, okadaic acid phosphatase inhibition |
Journal of cellular physiology |
Medium |
10497314
|
| 2001 |
MacMARCKS interacts with dynamitin (a dynactin complex subunit) in living cells; interaction is concentrated at the cell periphery in resting macrophages and is lost upon PMA stimulation as both proteins redistribute to perinuclear regions, linking MacMARCKS to microtubule motor-dependent functions. |
FRET (CFP/YFP fusion proteins), in vitro pulldown, live-cell imaging in RAW macrophages and HEK293 cells |
The Journal of biological chemistry |
Medium |
11278693
|
| 2002 |
MacMARCKS interacts with the C-terminal cytoplasmic tail of the serotonin transporter (SERT) as identified by yeast two-hybrid and confirmed by co-transfection; MacMARCKS co-expression reduces maximal 5-HT uptake rate and attenuates PKC-induced SERT downregulation. |
Yeast two-hybrid screen, co-transfection in HEK293 cells, [3H]serotonin uptake assay |
Biochemical and biophysical research communications |
Medium |
12051706
|
| 2006 |
MacMARCKS binds to the cytoplasmic C-terminal tail of metabotropic glutamate receptor 7 (mGluR7); binding is antagonized by Ca2+/calmodulin. Co-transfection of MacMARCKS with mGluR7 reduces G-protein-mediated tonic inhibition of voltage-sensitive Ca2+ channels (VSCCs), an effect dependent on MacMARCKS–mGluR7 interaction. |
Yeast two-hybrid, in vitro pulldown, co-immunoprecipitation, colocalization in transfected HEK293 and cerebellar granule cells, electrophysiology (VSCC inhibition) |
Journal of neurochemistry |
High |
16987251
|
| 2012 |
JNK directly phosphorylates MARCKSL1 on C-terminal residues S120, T148, and T183. Phosphorylation by JNK enables MARCKSL1 to bundle and stabilize F-actin, increase filopodium numbers/dynamics, and retard cell migration. Conversely, non-phosphorylatable MARCKSL1 enhances lamellipodia formation and cell migration while reducing filopodia. This mechanism operates in neurons and prostate cancer cells. |
In vitro kinase assay (JNK phosphorylation), site-directed mutagenesis (S120A/T148A/T183A and S120D/T148D/T183D), F-actin bundling/stabilization assay, live-cell imaging of filopodia/lamellipodia, migration assay (neurons and prostate cancer cells), siRNA knockdown |
Molecular and cellular biology |
High |
22751924
|
| 2014 |
LOXL2 interacts with MARCKSL1 via its scavenger-receptor domain binding to the N-terminal domain of MARCKSL1; LOXL2 promotes cell proliferation by inhibiting MARCKSL1-induced apoptosis, and MARCKSL1 suppresses LOXL2-induced oncogenesis and reduces luciferase reporter activity in a dose-dependent manner. |
Co-immunoprecipitation, domain-mapping pulldown assays, luciferase reporter assay, flow cytometry (cell cycle/apoptosis), siRNA knockdown |
Cellular signalling |
Medium |
24863880
|
| 2015 |
MARCKSL1 suppresses angiogenesis by interacting with VEGFR-2 and inhibiting VEGF-induced phosphorylation of VEGFR-2 and downstream PI3K/Akt/PDK-1/mTOR signaling; it reduces VEGF-induced HUVEC proliferation and tubular structure formation in vitro, and decreases HIF-1α and VEGF expression. |
HUVEC proliferation assay, tube formation assay, Western blot for VEGFR-2 phosphorylation and downstream kinase phosphorylation, MARCKSL1 overexpression |
Oncology reports |
Medium |
26555156
|
| 2018 |
MARCKSL1 overexpression in the amygdala increases dendritic spine formation in the central amygdala and elevates HPA axis activity and anxiety-like behaviors; knockdown of MARCKSL1 specifically in the amygdala normalizes both HPA axis activity and anxiety behaviors in transgenic mice. |
MARCKSL1 transgenic mice, site-specific knockdown in amygdala, behavioral assays (anxiety), spine morphology analysis, corticotropin-releasing hormone dependence assay |
EBioMedicine |
Medium |
29580842
|
| 2019 |
VPA-induced transcriptional downregulation of MARCKSL1 (an actin-stabilizing protein) underlies impairment of dendritic morphology and functional properties in developing but not mature human neurons; these effects are mediated through HDAC and GSK-3 pathway inhibition. |
Direct reprogramming of human neurons, VPA treatment, RNA sequencing, dendritic morphology quantification, functional electrophysiology, pathway inhibitor experiments |
Cell stem cell |
Medium |
31155484
|
| 2020 |
Marcksl1 modulates the mechanical properties of the endothelial cell cortex to regulate cell shape and vessel diameter during angiogenesis. Overexpression increases EC size, microvessel diameter, and induces ectopic blebbing suppressed by reduced blood flow; Marcksl1 promotes formation of linear actin bundles and decreases branched actin density at the cortex. |
In vivo overexpression/depletion in zebrafish, high-resolution live imaging, actin network analysis, microvessel diameter quantification, blood flow manipulation |
Nature communications |
High |
33127887
|
| 2022 |
MARCKSL1 promotes esophageal squamous cell carcinoma cell migration and invasion by interacting with F-actin and cortactin to regulate invadopodia formation and extracellular matrix degradation. |
siRNA knockdown and overexpression, immunofluorescence colocalization of F-actin and cortactin, gelatin degradation assay, Transwell/wound-healing assays, RNA sequencing |
Cancer medicine |
Medium |
35894387
|
| 2023 |
Endothelial JNK1 (but not JNK2) is activated by neutrophil adhesion and phosphorylates MARCKSL1 to promote formation of apical filopodia; these filopodia facilitate adhesion of secondary neutrophils and establish transmigration hotspots. Chemical JNK inhibition prevents neutrophil adhesion. |
Kinase translocation reporters, FRET-based Cdc42 biosensors, JNK1/JNK2 specific inhibition/knockdown, MARCKSL1 knockdown, live-cell imaging of filopodia, neutrophil adhesion assay |
iScience |
Medium |
37559902
|
| 2025 |
MARCKSL1 promotes EV secretion from the plasma membrane (in part at the expense of late endosome-PM fusion); MARCKSL1 collaborates with PM-bridging cytoskeletal components (e.g., Radixin) and SNARE-associated proteins (e.g., STXBP3) in this process, as identified by CRISPR activation screen and genomic activation/ablation with microscopic and proteomic follow-up. |
Genome-wide CRISPR activation screen (CD63 surface levels), genomic activation/ablation, electron microscopy, proteomics, co-immunoprecipitation/interaction studies with Radixin and STXBP3 |
bioRxivpreprint |
Medium |
bio_10.1101_2025.07.24.665424
|
| 2026 |
MARCKSL1 expression in dendritic cells is upregulated by TGF-β1 and is required for dendritic cell-mediated promotion of fibroblast differentiation into myofibroblasts during wound healing; MARCKSL1 shRNA knockdown in dendritic cells diminishes their ability to induce myofibroblast differentiation, and systemic MANS peptide inhibition attenuates scar formation in vivo. |
TGF-β1 stimulation of mouse dendritic cells, MARCKSL1 shRNA knockdown, co-culture with fibroblasts, myofibroblast differentiation assay, MANS peptide treatment in mouse wound model, single-cell RNA sequencing |
Wound repair and regeneration |
Medium |
41782175
|