| 2001 |
CED-12/ELMO1 binds directly to CED-5/Dock180, and this evolutionarily conserved complex stimulates Rac GEF activity, leading to Rac1 activation and cytoskeletal rearrangements required for phagocytosis of apoptotic cells and cell migration. |
Direct binding demonstrated by pulldown/Co-IP; functional cooperation shown by phagocytosis and cell shape change assays in mammalian cells; genetic epistasis in C. elegans |
Cell |
High |
11595183
|
| 2001 |
CED-12/ELMO1 contains a pleckstrin homology (PH) domain and an SH3-binding motif, both required for function; CED-12 physically interacts with CED-5 (Dock180) via the CED-5 SH3 domain, and the complex acts upstream of CED-10/Rac1 to regulate Rho/Rac GTPase-dependent cytoskeletal reorganization. |
Yeast two-hybrid and Co-IP for interaction; domain deletion/mutation analysis; epistasis in C. elegans; expression in Swiss 3T3 fibroblasts to induce actin filament bundles |
Developmental cell |
High |
11703939 11703940
|
| 2003 |
ELMO1 forms a bipartite Rac1 GEF complex with Dock180, and specific regions of each protein are required for complex formation and Rac activation during cell migration; the N-terminal 330 amino acids of ELMO1 are required for localization to lamellipodia and migration but not for Rac activation per se, indicating that proper subcellular localization of the complex is critical. |
Transwell migration assay with ELMO1/Dock180 deletion mutants; C. elegans transgenic rescue; Co-IP; Rac activation assays |
The Journal of biological chemistry |
High |
14638695
|
| 2003 |
The phosphatidylserine receptor PSR-1 (C. elegans) acts upstream of CED-2/CED-5/CED-12(ELMO) pathway in apoptotic cell engulfment, directly interacting with CED-5 and CED-12, linking extracellular PS recognition to intracellular Rac signaling. |
In vitro PS binding assay; genetic epistasis in C. elegans; Co-IP of PSR-1 with CED-5 and CED-12 |
Science (New York, N.Y.) |
High |
14645848
|
| 2003 |
DOCK2 associates with ELMO1 through its SH3 domain; this association is required for DOCK2-mediated Rac activation and actin polymerization in T cells, as a DOCK2 mutant lacking the ELMO1-binding region fails to activate Rac. |
Co-IP; Rac activation assay; functional rescue with ELMO1 expression in DOCK2-expressing but ELMO1-deficient plasmacytoma cells |
Blood |
High |
12829596
|
| 2004 |
ELMO/CED-12 contains evolutionarily conserved Armadillo (ARM) repeats that mediate direct interaction with activated RhoG/MIG-2; this links the upstream TRIO/UNC-73 → RhoG/MIG-2 signaling module to ELMO-Dock180-dependent Rac activation during phagocytosis. |
Domain identification by sequence analysis; direct binding assay of ELMO ARM repeats with activated RhoG; genetic epistasis in C. elegans; Rac activation assays |
Current biology : CB |
High |
15620647
|
| 2004 |
HIV-1 Nef binds the DOCK2-ELMO1 complex in T cells, activating Rac, inhibiting lymphocyte chemotaxis, and promoting T cell activation in the absence of antigenic stimuli. |
Proteomic purification of Nef-associated complex from T cells; mass spectrometry identification of DOCK2-ELMO1-Rac complex; Rac activation assays; chemotaxis assays |
PLoS biology |
High |
14737186
|
| 2002 |
ELMO1 interacts directly with the SH3 domain of the Src-family kinase Hck via a polyproline motif, and is heavily tyrosine-phosphorylated by Hck in intact cells, suggesting it is an Hck substrate. |
Mass spectrometry pulldown from U937 monocytes; in vitro direct binding with purified proteins; co-immunoprecipitation in intact cells; phosphorylation detected by anti-phosphotyrosine immunoblot |
The Journal of biological chemistry |
High |
12029088
|
| 2005 |
Hck phosphorylates ELMO1 at Tyr18, Tyr216, Tyr395, Tyr511, and Tyr720; mutants lacking these sites are defective in promoting phagocytosis and cell migration, with Tyr511 being particularly important; phospho-ELMO1 mutants retain Dock180 and Crk binding but show reduced Rac activation. |
Mass spectrometry identification of phosphorylation sites; site-directed mutagenesis; phagocytosis and migration assays; Rac activation assays; Co-IP |
Biochemistry |
High |
15952790
|
| 2006 |
ELMO1 inhibits ubiquitylation of Dock180, preventing its proteasomal degradation; Dock180 is ubiquitylated on the plasma membrane and ELMO1 binding protects it from this modification, thereby increasing Dock180 protein levels and local Rac activation. |
In vivo ubiquitylation assay; proteasome inhibitor treatment; immunofluorescence; co-expression studies; membrane fractionation |
Journal of cell science |
High |
16495483
|
| 2005 |
ELMO1 directly binds ERM proteins (e.g., radixin) via its N-terminal 280 amino acids; ELMO1 can simultaneously bind both radixin and Dock180; ELMO1-ERM binding is independent of radixin C-terminal phosphorylation state; a trimeric complex of active RhoG-ELMO1-radixin can be detected and they colocalize at the plasma membrane. |
In vitro pulldown with purified recombinant proteins; endogenous Co-IP; domain mapping; colocalization by immunofluorescence |
The Journal of biological chemistry |
High |
16377631
|
| 2007 |
Drosophila ELMO/CED-12 forms a complex with Myoblast city (MBC, the Dock180 homolog) via the MBC SH3 domain; the complex is present in embryonic musculature during myoblast fusion; loss of ELMO causes myoblast fusion defects; overexpression of MBC and ELMO together causes fusion and ommatidial defects suppressed by Rac1/Rac2 mutations, genetically confirming that MBC-ELMO activates Rac GTPases. |
Yeast two-hybrid; mass spectrometry confirmation of endogenous MBC/ELMO complex; genetic loss-of-function and overexpression; suppressor genetics with Rac1/Rac2 mutants |
Developmental biology |
High |
18163987
|
| 2008 |
The ELMO1-Dock180 interaction is mediated by two interfaces: the C-terminal ~200 aa of ELMO1 (including the PH domain plus an N-terminal amphipathic alpha-helix) binding to the N-terminal 200 aa of Dock180, and a secondary interaction between the Dock180 SH3 domain and C-terminal proline-rich motifs of ELMO1. The ELMO1 PH domain structurally resembles FERM domains and cannot bind phospholipids. Disruption of both interfaces is needed to abrogate Rac signaling in vivo, although Dock180 GEF catalytic activity is retained. |
Crystal structure of ELMO1 PH domain; biochemical mapping of interaction interfaces; site-directed mutagenesis of hydrophobic helix residues; Rac signaling assays |
Molecular biology of the cell |
High |
18768751
|
| 2010 |
ELMO1 functions downstream of the phagocytic receptor BAI1 and upstream of RAC1 in Sertoli-cell-mediated phagocytic clearance of apoptotic germ cells in the testis; ELMO1-deficient mice show disrupted seminiferous epithelium, uncleared apoptotic germ cells, and decreased sperm output. |
ELMO1-knockout mouse generation; histological analysis; in vitro engulfment assays; genetic epistasis with BAI1 and RAC1 |
Nature |
High |
20844538
|
| 2010 |
Netrin-1 and its receptor Unc5B act as upstream activators of the ELMO1/DOCK180 complex in endothelial cells, regulating ELMO1/DOCK180 functional interaction and Rac1 activation to drive vascular morphogenesis in zebrafish. |
Morpholino knockdown in zebrafish; transgenic vascular imaging; epistasis between Netrin-1/Unc5B and ELMO1/DOCK180; Rac1 activation assay |
Circulation research |
High |
20466982
|
| 2012 |
The crystal structure of the DOCK2-ELMO1 interaction complex at 2.1 Å resolution reveals that the ELMO1 C-terminal Pro-rich tail winds around the DOCK2 SH3 domain, forming an intermolecular five-helix bundle. DOCK2 and ELMO1 mutually relieve each other's autoinhibitory states upon complex formation: DOCK2-ELMO1 assembly weakens the intramolecular autoinhibitory interaction within DOCK2 (DHR2-N-terminal region), and ELMO1 autoinhibitory residues are buried in the hydrophobic core of the helix bundle. |
Crystal structure determination (2.1-Å resolution); mutagenesis; biochemical autoinhibition assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
22331897
|
| 2012 |
Elmo1 is required for directed macrophage engulfment of apoptotic cells in living zebrafish brain; in elmo1-deficient macrophages, directed engulfment is rare and may be replaced by macropinocytosis. |
Real-time live imaging in zebrafish; elmo1 morpholino knockdown; tracking of apoptotic cells |
Current biology : CB |
High |
22503503
|
| 2012 |
ELMO1 binds the Mediator complex subunit Med31; during Salmonella infection in macrophages, ELMO1 increases the cytoplasmic localization of Med31 and enhances Med31 monoubiquitination, specifically affecting expression of cytokine genes Il10 and Il33. |
Co-IP; subcellular fractionation; ubiquitination assay; cytokine gene expression analysis in primary macrophages |
Current biology : CB |
Medium |
23273896
|
| 2013 |
CXCL12 stimulation promotes interaction between Gαi2 and ELMO1; Gi signaling and ELMO1 are both required for CXCL12-mediated actin polymerization and migration; CXCL12 triggers a Gαi2-dependent membrane translocation of ELMO1, which then associates with Dock180 to activate Rac1 and Rac2 for breast cancer cell invasion and metastasis. |
Co-IP of Gαi2-ELMO1 after CXCL12 stimulation; siRNA knockdown; Rac activation assays; membrane translocation by fractionation; in vivo metastasis assays |
Nature communications |
High |
23591873
|
| 2014 |
Elmo1, but not Elmo2, constitutively interacts with Dock2 in primary T lymphocytes and is essential for Dock2-dependent CCR7/CXCR4-mediated Rac activation and T cell chemotaxis; Elmo1 protects Dock2 from polyubiquitylation and proteasomal degradation, as Dock2 levels drop ~4-fold in Elmo1−/− T cells and are partially rescued by proteasome inhibitors. |
Co-IP from primary T cells; Elmo1 knockout mice; chemotaxis assays; Rac activation assay; ubiquitination assay; rescue with Elmo1 mutants |
Journal of immunology (Baltimore, Md. : 1950) |
High |
24821968
|
| 2014 |
Arhgef16 interacts with Elmo1 in mammalian cells and promotes engulfment of apoptotic cells synergistically with Elmo1 in a RhoG-dependent, Dock1-independent manner. |
Yeast two-hybrid screen with Elmo1 as bait; co-immunoprecipitation; engulfment assays with Elmo1 depletion |
Biochimica et biophysica acta |
Medium |
25063526
|
| 2011 |
The phosphoinositide phosphatase MTM-1 acts upstream of the CED-2/CED-5/CED-12 ternary GEF complex in C. elegans apoptotic cell clearance; the CED-12 PH domain binds PtdIns(3,5)P2 (a MTM-1 substrate), suggesting MTM-1 regulates CED-12/ELMO1 recruitment to the plasma membrane. |
Epistasis analysis in C. elegans; lipid-binding assay of CED-12 PH domain |
Development (Cambridge, England) |
Medium |
21490059
|
| 2011 |
The RhoG/ELMO1/Dock180 signaling module is required for dendritic spine morphogenesis in hippocampal neurons; Dock180 depletion inhibits spine formation, overexpression promotes it; ELMO1 cooperates with Dock180 through Rac activation; RhoG acts upstream of the ELMO1/Dock180 complex in this context. |
RNAi screen of 70 rat Rho GEFs in cultured hippocampal neurons; overexpression and knockdown of Dock180, ELMO1, and RhoG; spine morphology quantification |
The Journal of biological chemistry |
Medium |
21900250
|
| 2015 |
Src phosphorylates ELMO1 at Tyr724 (and Tyr720); Y724F mutation abolishes Src-triggered Rac1 activation and impairs cell spreading on fibronectin and cell migration, without affecting Dock180 binding; Fyn also phosphorylates ELMO1 in vivo. |
In vivo and in vitro phosphorylation assays; site-directed mutagenesis; Rac1 activation assay; cell spreading and migration assays in stable NIH3T3 lines |
Cell communication and signaling : CCS |
High |
26205662
|
| 2016 |
ELMO1 directly interacts with Gβγ subunits of heterotrimeric G proteins via the ELMO1 N-terminus; chemoattractant GPCR activation promotes Gβγ-ELMO1 interaction, which is required for membrane translocation of ELMO1 and subsequent Rac1 activation during chemotaxis. |
Co-IP of ELMO1 with Gβγ after chemoattractant stimulation; domain mapping; membrane translocation assays; Rac1 activation assay; chemotaxis assay with siRNA knockdown |
Journal of Cancer |
Medium |
27313788
|
| 2015 |
ELMO1/Dock180 protect endothelial cells from apoptosis by activating the Rac1/PAK/AKT signaling cascade; overexpression reduces caspase-3/7 activity and promotes blood vessel formation in zebrafish embryos. |
Overexpression in human ECs; caspase-3/7 activity assay; annexin V staining; zebrafish overexpression with apoptosis quantification; Rac1/PAK/AKT pathway activation assays |
The Journal of biological chemistry |
Medium |
25586182
|
| 2018 |
FE65 neuronal adaptor interacts with ELMO1 via its N-terminal region, relieves ELMO1 intramolecular autoinhibitory interaction, and promotes targeting of ELMO1 to the plasma membrane, thereby activating Rac1-mediated neurite outgrowth; FE65, ELMO1, and DOCK180 form a tripartite complex. |
Co-IP; domain mapping; ELMO1 autoinhibition assay; plasma membrane localization by fractionation; Rac1 activation assay; neurite outgrowth assay with knockdown and rescue |
The Journal of biological chemistry |
High |
29615491
|
| 2010 |
ELMO1 interacts with COX-2 in human mesangial cells; this interaction increases COX-2 cyclooxygenase activity and, consequently, fibronectin promoter activity and fibronectin expression, independent of Rac1 signaling. |
Co-IP; COX-2 cyclooxygenase activity assay; fibronectin promoter reporter assay; dominant-negative ELMO1 (lacking Rac1 activity) retains COX-2 interaction and fibronectin upregulation |
Cellular signalling |
Medium |
20732417
|
| 2019 |
ELMO1 has a noncanonical role in neutrophils: it associates with neutrophil-specific receptors, regulates neutrophil activation, and promotes early neutrophil recruitment to joints in arthritis models; Elmo1-deficient mice show reduced joint inflammation in arthritis without general suppression of inflammatory responses. |
Elmo1-knockout mice in acute and chronic arthritis models; cell biology studies of ELMO1 association with neutrophil receptors; migration assays with human donor neutrophils |
Nature immunology |
High |
30643265
|
| 2020 |
The cryo-EM structures of DOCK2-ELMO1 alone (closed/autoinhibited) and as a ternary complex with RAC1 (open/active), plus the crystal structure of RHOG-ELMO2-RBD, reveal that the binary complex adopts a closed autoinhibited conformation; transition to an active open state involves conformational change of the ELMO1 subunit that exposes RAC1-binding sites on DOCK2-DHR2 and binding sites for RHOG and BAI GPCRs on ELMO1. DOCK2/ELMO1 phosphorylation destabilizes the autoinhibited state. |
Cryo-EM structure of DOCK2-ELMO1 and DOCK2-ELMO1-RAC1; crystal structure of RHOG-ELMO2-RBD; mutagenesis |
Nature communications |
High |
32651375
|
| 2021 |
Cryo-EM structure of the active ELMO1-DOCK5 complex bound to Rac1 at 3.8-Å resolution shows that the C-terminal region of ELMO1 including the PH domain aids DOCK5-DHR2 binding to nucleotide-free Rac1; a complex α-helical scaffold between ELMO1 and DOCK5 stabilizes Rac1 binding. Mutagenesis confirms the ELMO1 PH domain enhances GEF activity of DOCK5 through specific Rac1 interactions. |
Cryo-EM structure determination; mutagenesis; GEF activity assays |
Science advances |
High |
34290093
|
| 2021 |
ELMO1 functions as a signaling hub in osteoclasts; ELMO1 deletion reduces bone loss in four in vivo models; ELMO1 contributes to osteoclast sealing zone formation and distribution of osteoclast-specific proteases (cathepsin G, myeloperoxidase identified by transcriptomics/CRISPR); the ELMO1 interactome in osteoclasts (defined by proteomics) includes proteins required for bone degradation; a 3D structure-based ELMO1 inhibitory peptide reduces bone resorption. |
ELMO1 knockout mice in four bone-loss models; CRISPR/Cas9 deletion of Elmo1-associated genes; proteomics of ELMO1 interactome; osteoclast sealing zone imaging; inhibitory peptide functional assay |
Nature communications |
High |
34404802
|
| 2017 |
ELMO1 is required for macrophage internalization of Salmonella Typhimurium via Rac1 activation; ELMO1-dependent internalization is essential for TNF-α and MCP-1 production and activation of NF-κB, ERK1/2 and p38 MAP kinases; ELMO1-deficient mice show 90% reduction in bacterial burden. |
siRNA knockdown of ELMO1 in macrophages; Rac1 pulldown assay; cytokine array; NF-κB/ERK/p38 activation by immunoblot; ELMO1 knockout mice infected with Salmonella |
Cellular and molecular gastroenterology and hepatology |
High |
26878033
|
| 2017 |
ELMO1 regulates LC3-associated phagocytosis (not canonical ULK1-dependent autophagy) after Salmonella infection; ELMO1 is present in intracellular vesicles/phagosomes and is required for lysosomal acidification and cathepsin B activity for bacterial clearance. |
siRNA depletion; LC3B accumulation assay; ATG5/ULK1 co-depletion epistasis; lysosomal pH measurement; cathepsin B activity assay; bacterial survival assay |
The Journal of infectious diseases |
High |
29029244
|
| 2017 |
Elmo1 intermolecular interaction with Ephexin4: Elmo1 associates with both the SH3 domain and the N20 region of Ephexin4, competing with the Ephexin4 SH3 domain for the N20 region, thereby relieving autoinhibitory steric hindrance and promoting RhoG access to Ephexin4 for RhoG activation and apoptotic cell engulfment. |
Domain binding assays; Co-IP; RhoG activation assays; engulfment assays |
Scientific reports |
Medium |
28667327
|
| 2019 |
ELMO1 negatively regulates GPVI-mediated platelet activation and thrombus formation; ELMO1-deficient platelets show enhanced Rac-independent, RhoG-dependent signaling downstream of GPVI; ELMO1 interacts with active RhoG in platelets (identified as a PIP3-interacting protein by proteomics). |
Proteomics screen for PIP3-binding proteins; ELMO1−/− mice; platelet aggregation, granule secretion, integrin activation, and spreading assays; in vivo thrombosis models; RhoG activity assay |
Blood advances |
High |
30787021
|
| 2014 |
Nck-1 interacts with ELMO1 via its SH2 domain binding to phosphotyrosines at positions 18, 216, 395, and 511 of ELMO1; this interaction promotes ELMO1 binding to active RhoG and enhances Rac1 activation and cell motility. |
GST pulldown; Co-IP; SH2 domain mutant (R308K) and ELMO1 phosphotyrosine mutant (4YF); Rac1 activation assay; cell motility assay |
The Journal of biological chemistry |
Medium |
24928514
|
| 2020 |
FE65 potentiates ARF6-Rac1 signaling by linking ARF6 to ELMO1; FE65 promotes ELMO1 trafficking via the endosomal recycling pathway to the plasma membrane; knockout of FE65 decreases ELMO1 in recycling endosomes and attenuates ELMO1/DOCK180-mediated Rac1 activation and neurite outgrowth. |
Co-IP; FE65-binding-defective mutants; siRNA; subcellular fractionation; Rac1 activation assay; neurite outgrowth assay |
FASEB journal |
Medium |
33047393
|
| 2019 |
Elmo1 regulates peripheral neuronal numbers and Schwann cell myelination in zebrafish PLL system through Rac1 activation; cell-autonomous expression of Elmo1 and Rac1 in Schwann cells rescues myelination defects in elmo1 mutants. |
Zebrafish elmo1 mutant; Rac1 activation rescue; macrophage inhibition; Schwann cell-specific rescue experiment; myelination imaging |
Cellular and molecular life sciences : CMLS |
High |
31161284
|
| 2021 |
TNF-α leads to increased ELMO1 expression in mesenchymal stem cells via METTL14-dependent m6A modification of the ELMO1 3'UTR, promoting directional migration of AS-MSC; inhibiting ELMO1 reduces spondyloarthritis pathology in SKG mice. |
m6A modification assay; METTL14 knockdown; in vitro and in vivo migration assays; ELMO1 expression in AS patient samples; SKG mouse therapeutic inhibition |
Nature communications |
High |
34508078
|
| 2024 |
Cryo-EM structures of DOCK5/ELMO1 alone (closed, autoinhibited) and in complex with RhoG and Rac1 (open, active) reveal that RhoG binds both ELMO1 and DOCK5 in the open state, facilitating a closed-to-open conformational change; SPR and biochemical assays confirm RhoG enhances DOCK5/ELMO1 GEF activity and increases Rac1 binding affinity; RhoG and DOCK5 membrane-targeting sequences may enable simultaneous plasma membrane binding. |
Cryo-EM structure determination; SPR binding assays; GEF activity assays; structural comparison of apo vs. RhoG-bound states |
The Journal of biological chemistry |
High |
38857861
|
| 2023 |
ELMO1 RBD structure was determined alone and in complex with RhoG; a computationally designed nanobody (Nb29) blocks the ELMO1-RBD/RhoG interaction, providing structural validation that ELMO1-RBD is targetable. |
Crystal/cryo structure of ELMO1-RBD; computational nanobody design; SPR binding assays; mutagenesis; inhibition of ELMO1-RBD/RhoG interaction by Nb29 |
Communications biology |
High |
36932164
|
| 2024 |
ELMO1 K505 is acetylated by p300 (acetyltransferase) and deacetylated by SIRT2; K505 acetylation does not affect ELMO1 localization or stability but mediates the ELMO1-Dock180 interaction, thereby influencing Rac1 activation and colorectal cancer cell behavior. |
Immunoprecipitation and mass spectrometry identification of K505 acetylation; p300 and SIRT2 identified as writer/eraser; mutagenesis; Rac1 activation assay; Co-IP of ELMO1-Dock180 |
Experimental cell research |
Medium |
38750717
|
| 2016 |
Loss of TGFβ receptor II (Tgfbr2) de-represses ELMO1 expression in cancer stem cells; restoration of Tgfbr2 blocks ELMO1 expression in vivo; knockdown of Elmo1 impairs metastasis to the lung in a mouse squamous cell carcinoma model, identifying ELMO1 as a target of TGFβ signaling. |
Mouse model of Tgfbr2-deficient squamous carcinoma; Tgfbr2 restoration experiment; Elmo1 knockdown; in vivo lung metastasis assay |
eLife |
Medium |
28219480
|
| 2023 |
ELMO1 interacts with NOD2; overexpression of ELMO1 with mutant NOD2 (L1007fs, Crohn's disease-associated) fails to clear adherent invasive E. coli; depletion of both ELMO1 and NOD2 impairs bacterial clearance and pro-inflammatory responses in macrophages. |
Co-IP; ELMO1/NOD2 KO enteroid-derived monolayers; macrophage depletion experiments; bacterial load and cytokine/ROS assays |
Virulence |
Medium |
36694274
|