| 2006 |
DOCK7 is a Rac GTPase activator that is asymmetrically distributed in unpolarized hippocampal neurons and selectively expressed in the nascent axon; DOCK7 knockdown prevents axon formation while overexpression induces multiple axons; DOCK7 and Rac activation lead to phosphorylation and inactivation of the microtubule destabilizing protein stathmin/Op18 in the nascent axon, establishing a DOCK7→Rac→stathmin/Op18 pathway for axon development. |
shRNA knockdown, overexpression, immunofluorescence localization, phospho-stathmin assays in hippocampal neurons |
Neuron |
High |
16982419
|
| 2008 |
The NRG1 receptor ErbB2 directly binds and phosphorylates DOCK7 at Tyr-1118, activating DOCK7 GEF activity toward Rac1 and Cdc42, which in turn activates JNK to promote Schwann cell migration; a Y1118F mutant of DOCK7 fails to transduce NRG1 signals. |
Co-immunoprecipitation, site-directed mutagenesis (Y1118F), Rho GTPase pull-down activity assays, siRNA knockdown, Schwann cell migration assays |
The Journal of cell biology |
High |
18426980
|
| 2011 |
DOCK7 negatively regulates Schwann cell differentiation and onset of myelination: DOCK7 knockdown shortens Rac/Cdc42/JNK activation (negative regulator of myelination) and accelerates Rho/ROCK activation (positive regulator of myelination), resulting in enhanced myelin thickness in Dock7 shRNA transgenic mice. |
siRNA knockdown in primary Schwann cells, shRNA transgenic mouse generation, Rho GTPase activity assays, myelin thickness measurement |
The Journal of neuroscience |
High |
21880919
|
| 2012 |
DOCK7 interacts with the centrosome-associated protein TACC3 and antagonizes its microtubule growth-promoting function to control apically directed interkinetic nuclear migration of radial glial progenitor cells (RGCs), thereby regulating the switch from proliferative to differentiative divisions during cortical neurogenesis. |
In utero electroporation-based DOCK7 silencing/overexpression, co-immunoprecipitation of DOCK7 and TACC3, interkinetic nuclear migration assays, neuronal differentiation quantification |
Nature neuroscience |
High |
22842144
|
| 2012 |
DOCK7 binds to the cytoplasmic domain of RAGE (receptor for advanced glycation end-products) via co-immunoprecipitation/MS, and transduces RAGE signaling to Cdc42, resulting in formation of dendritic pseudopodia and promoting cancer cell migration. |
Immunoprecipitation–LC-MS/MS screen of RAGE cytoplasmic domain interactors, co-immunoprecipitation validation, Cdc42 activity assay, DOCK7 knockdown with cell migration and morphology readouts |
Oncology reports |
Medium |
23254359
|
| 2013 |
The DHR2 (GEF) domain of DOCK7 is a potent guanine nucleotide exchange factor for prenylated Cdc42 and Rac1 on membrane liposomes, but not for non-prenylated GTPases in solution; membrane localization of Cdc42/Rac1 is required for DOCK7-mediated activation. An N-terminal site within DHR2 (distinct from the catalytic active site) preferentially binds GTP-loaded Cdc42/Rac1 and recruits DHR2 to the membrane, creating positive cooperativity that accelerates nucleotide exchange. |
Liposome reconstitution assay, in vitro GEF activity assay with prenylated vs. non-prenylated GTPases, site-directed mutagenesis to identify GTPase-selectivity residues |
Biochemistry |
High |
23718289
|
| 2014 |
DOCK7 functions as a cytoplasmic activator of the ErbB4 receptor tyrosine kinase in chandelier cells (ChCs); DOCK7 modulates ErbB4 activity and is required for chandelier cell cartridge and bouton development in vivo. |
In utero electroporation-based genetic labeling and manipulation of ChCs, DOCK7 knockdown/overexpression, co-immunoprecipitation of DOCK7 and ErbB4, morphological quantification of cartridges and boutons |
Cell reports |
Medium |
24440718
|
| 2014 |
DOCK7 co-immunoprecipitates with c-Met in glioblastoma cells and this interaction is enhanced upon HGF stimulation in a manner dependent on the adaptor protein Gab1; Gab1 is required for HGF-induced DOCK7 and Rac1 activation and glioblastoma cell invasion. DOCK7 mediates serum- and HGF-induced GBM invasion via Rac activation. |
Co-immunoprecipitation (DOCK7 with c-Met, DOCK7 with Gab1), siRNA knockdown of DOCK7/Gab1, Rac1 GTPase activity assay, Matrigel and brain slice invasion assays |
British journal of cancer |
Medium |
24518591
|
| 2009 |
Loss-of-function mutations in DOCK7 (misty and moonlight alleles) that truncate the DOCK7 protein cause generalized hypopigmentation and white-spotting in mice, demonstrating a non-redundant role for DOCK7 in dermal and follicular melanocyte distribution/function. |
Forward genetic mapping, allele complementation test, sequencing of DOCK7 mutations in misty and moonlight mice, phenotypic characterization |
Proceedings of the National Academy of Sciences of the United States of America |
High |
19202056
|
| 2012 |
DOCK7 was identified as a binding partner of myosin VI (MVI) in neuronal PC12 cells by pull-down and mass spectrometry; endogenous MVI–DOCK7 interaction was confirmed by co-immunoprecipitation; the two proteins co-localize in interphase and dividing cells and in neurite outgrowths of primary hippocampal neurons. |
Pull-down + mass spectrometry, co-immunoprecipitation of endogenous proteins, co-localization by fluorescence microscopy |
Biochemistry and cell biology |
Medium |
22475431
|
| 2016 |
Myosin VI (MVI) binds DOCK7 through its cargo domain RRL motif interacting with DOCK7 C-terminal M2 and DHR2 domains; MVI knockdown reduces Rac1 activity and decreases DOCK7 phosphorylation at Tyr1118, indicating that MVI contributes to DOCK7 activation; the MVI–DOCK7 interaction is required for NGF-stimulated protrusion formation in PC12 cells. |
Domain mapping by co-immunoprecipitation, MVI knockdown with Rac1 GTPase activity assay, pY1118-DOCK7 immunoblotting, NGF-stimulated differentiation assay, GFP-tagged cargo-domain dominant-negative overexpression |
Biochimica et biophysica acta |
Medium |
27018747
|
| 2017 |
DOCK7 regulates postnatal neuroblast tangential migration along the rostral migratory stream via two distinct pathways: (1) a Rac-dependent pathway controlling leading process stability/growth likely through modulation of microtubule networks, and (2) a myosin phosphatase-RhoA-interacting protein (MYO9A/MPRIP)-dependent pathway regulating F-actin remodeling at the cell rear to promote somal translocation. |
In vivo DOCK7 knockdown by in utero electroporation, live imaging of neuroblast migration, F-actin and microtubule dynamics assays, Rac GTPase activity assays, dominant-negative pathway component expression |
The Journal of cell biology |
High |
29089377
|
| 2017 |
DOCK7 interacts with NBEAL2 (the gray platelet syndrome protein) in megakaryocytes and platelets; GPS-causing mutations in the NBEAL2 BEACH domain disrupt NBEAL2–DOCK7 interaction; DOCK7 is localized on the membrane of or in α-granules; platelets from GPS patients and Nbeal2-deficient mice are almost devoid of DOCK7, resulting in defective actin polymerization, platelet activation, and shape change. |
Co-immunoprecipitation (reverse), proximity ligation assay, subcellular fractionation/localization, GPS patient platelet analysis, Nbeal2 KO mouse platelet functional assays |
Blood |
High |
29187380
|
| 2021 |
DOCK7 acts as a replication stress regulator: it is phosphorylated by ATR kinase upon replication stress and recruited by MDC1 to chromatin and replication forks; DOCK7-mediated Rac1/Cdc42 activation leads to PAK1 activation, which phosphorylates RPA1 at S135 and T180 to stabilize chromatin-loaded RPA1 and ensure proper replication stress response; DOCK7 depletion sensitizes ovarian cancer cells to camptothecin. |
Chromatin fractionation, co-immunoprecipitation of DOCK7 with MDC1, phospho-site identification, Rac1/Cdc42 GTPase assays, PAK1 kinase assay, RPA1 phospho-mutant analysis, siRNA KD with camptothecin sensitivity assay |
Nucleic acids research |
High |
33704464
|
| 2023 |
A planar-polarized MYO6–DOCK7 axis spatially restricts RAC1 activity in mammary epithelial monolayers to drive cryptic lamellipodia extension in follower cells, thereby promoting tissue fluidification and cooperative collective motion; MYO6 activity is required upstream of DOCK7 for this polarized RAC1 activation. |
Live imaging of lamellipodia in monolayers, MYO6/DOCK7 knockdown, RAC1 activity biosensor (FRET or localization assay), collective migration tracking |
Cell reports |
Medium |
37590133
|
| 2025 |
The ErbB2–DOCK7 signaling axis mediates excessive neuronal process elongation induced by the ASD-linked Sema5A p.Arg676Cys variant; knockdown of DOCK7 or pharmacological inhibition of ErbB2 kinase reduces the aberrant process elongation and attenuates overactivation of downstream Rac1 and Cdc42 in primary cortical neurons and N1E-115 cells. |
shRNA knockdown of DOCK7, ErbB2 kinase inhibitor treatment, Rac1/Cdc42 GTPase activity assays, neuronal process length measurement in primary cortical neurons and N1E-115 cells |
International journal of molecular sciences |
Medium |
41226692
|
| 2024 |
DOCK7 packaged in tumor-associated macrophage-derived extracellular vesicles (TAM-EVs) activates RAC1 in colorectal cancer (CRC) recipient cells, leading to AKT and FOXO1 phosphorylation and upregulation of ABCA1, which increases cholesterol efflux, membrane fluidity, and CRC cell motility/metastasis. |
EV isolation and LC-MS protein identification, siRNA knockdown of DOCK7 in TAM-EVs and CRC cells, RAC1 GTPase activity assay, AKT/FOXO1 phosphorylation immunoblotting, cholesterol efflux assay, Transwell migration and liver metastasis mouse model |
Clinical and translational medicine |
Medium |
38385857
|