| 2006 |
AP2A1 (alpha-adaptin, component of clathrin-coated vesicles) physically associates with m-Numb in mouse testis germ cells, as demonstrated by co-immunoprecipitation, and the two proteins co-localize by confocal immunofluorescence microscopy of seminiferous tubules and isolated germ cells. |
Co-immunoprecipitation; confocal immunofluorescence microscopy |
Reproduction (Cambridge, England) |
Medium |
17127749
|
| 2010 |
AP2A1 is required for clathrin-mediated endocytosis (CME)-dependent entry of human enterovirus 71 (HEV71) into rhabdomyosarcoma cells; siRNA knockdown of AP2A1 significantly inhibited HEV71 infection in a dose-dependent manner, placing AP2A1 in the CME pathway essential for viral entry. |
siRNA knockdown; immunofluorescence co-localization; dominant-negative mutant expression; drug inhibition assays |
The Journal of biological chemistry |
Medium |
20956521
|
| 2016 |
AP2A1 (along with AP2A2 and AP2B1) shows increased protein levels associated with the EGFR interactome in erlotinib-resistant non-small cell lung cancer cells (HCC4006rERLO0.5) compared to parental cells, identified by affinity purification coupled with mass spectrometry. |
Affinity purification-mass spectrometry (AP-MS) |
European journal of pharmaceutical sciences |
Low |
27112992
|
| 2017 |
AP2A1 (alpha subunit of AP-2) is recruited to clathrin-mediated endocytosis sites concurrently with clathrin in Arabidopsis plant cells, as shown by TIRF microscopy using a departure assay; this temporal recruitment pattern differs from AP2M (mu subunit), which is not recruited in concert with clathrin. |
Total internal reflection fluorescence (TIRF) microscopy; automated departure assay |
Frontiers in plant science |
Low |
28484480
|
| 2016 |
Ap2a1 is required for hematopoietic stem/progenitor cell (HSPC) specification and development; knockdown of Ap2a1 in zebrafish impaired HSPC development in vivo, validating it as a gene essential for the endothelial-to-hematopoietic transition identified in a genome-wide RNAi screen. |
Genome-wide RNAi screen (in vitro ESC differentiation); zebrafish in vivo knockdown validation |
EMBO reports |
Medium |
27797851
|
| 2020 |
AP2A1/2 complex mediates clathrin-dependent endocytosis of IGF-1 receptor (IGF1R) in human keratinocytes; concurrent shRNA knockdown of AP2A1/2 and FLOT1/2 reduced IGF1R association with clathrin, internalization, and downstream pathway activation (phospho-IGF1R, phospho-AKT, phospho-MAPK) by >50%. AP2A1/2-mediated endocytosis routes IGF1R to Rab11-positive slow recycling endosomes, distinguishing it from the Flot-1/Rab4 fast-recycling pathway. |
shRNA knockdown; confocal/TIRF/SIM microscopy; co-immunoprecipitation; Western blot (phosphorylation assays); Rab11 association assay |
The Journal of investigative dermatology |
High |
32027876
|
| 2020 |
AP2A1 and AP2B1 subunits of AP-2 complex are upregulated by full-length IL-33 (FLIL33) overexpression in human lung fibroblasts, and siRNA-mediated knockdown of AP2A1/AP2B1 blocked FLIL33-induced Smad3 phosphorylation, while AP-2 subunit overexpression induced Smad3 phosphorylation independently of FLIL33, placing AP2A1 as a required mediator of TGFBR-dependent Smad3 activation downstream of FLIL33. |
siRNA knockdown; Western blotting; overexpression experiments |
Cellular immunology |
Medium |
32977155
|
| 2020 |
AP2A1 siRNA knockdown and pharmacological inhibition of clathrin-mediated endocytosis blocked HAdV-D37 (human adenovirus type 37) early gene expression in human corneal epithelial cells, establishing AP2A1 as required for this noncanonical clathrin-mediated viral entry pathway. |
siRNA knockdown; quantitative PCR; Western blot; chemical inhibitor assays |
Investigative ophthalmology & visual science |
Medium |
32852546
|
| 2021 |
AP2A1 (alpha-1 subunit of AP-2) associates with CLDN2 (claudin-2), clathrin, and LC3 upon starvation-induced autophagy in intestinal epithelial cells, as shown by co-immunoprecipitation; this interaction facilitates clathrin-mediated endocytosis of CLDN2 followed by lysosomal degradation, thereby reducing tight junction permeability. |
Co-immunoprecipitation; membrane fractionation; immunofluorescence; pharmacological inhibition |
Autophagy |
Medium |
34964704
|
| 2021 |
AP2A1 is recruited by MYO1F as an adaptor to α-tubulin during Dectin-1-induced signaling in macrophages; MYO1F acts as a scaffold recruiting both AP2A1 and α-tubulin N-acetyltransferase 1 (ATAT1) to α-tubulin to promote its acetylation, which in turn controls membrane-to-cytoplasm trafficking of SYK and CARD9 required for antifungal innate immune signaling. |
Co-immunoprecipitation; knockdown (Myo1f-deficient mice); in vivo infection models; Western blot |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
34301894
|
| 2021 |
AP2A1 colocalizes with tau pathology (neurofibrillary tangles) in Alzheimer's disease brains and is present in the detergent-insoluble fraction of cognitively impaired but not control brains, in an isoform-specific manner (AP2A1 but not AP2A2 labels neurofibrillary tangles), as determined by immunohistochemistry and immunofluorescence with antibody specificity validated by immunoblot after plasmid transfection. |
Immunoblot (after plasmid transfection for antibody validation); immunohistochemistry; immunofluorescence; fractionation |
Neuropathology and applied neurobiology |
Medium |
34820873
|
| 2023 |
AP2A1 binds directly to the circRNA circEIF3I and interacts with SMAD3, forming a ternary complex (circEIF3I–SMAD3–AP2A1) that facilitates recruitment of SMAD3 to TGFβRI on early endosomes, thereby promoting SMAD3 phosphorylation and activation of MMPs in pancreatic cancer cells. |
Co-immunoprecipitation; MS2-RNA affinity purification; mass spectrometry; RNA immunoprecipitation; RNA pulldown; immunofluorescence; RNA-protein interaction simulation |
Molecular cancer |
Medium |
37689715
|
| 2023 |
AP2A1 expression in the orbitofrontal cortex predicts alcohol use disorder severity; prefrontal Ap2a1 expression significantly correlates with voluntary alcohol drinking in genetically diverse mice, and recombinant inbred strains inheriting the C57BL/6J Ap2a1 allele consumed more alcohol than those inheriting the DBA/2J allele, linking AP2A1 to synaptic/presynaptic endocytosis mechanisms governing drinking behavior. |
Proteomics; machine learning; reverse genetics (mouse strains); gene expression correlation |
Molecular psychiatry |
Low |
37679472
|
| 2023 |
Radiation-induced ROS accumulation triggers excessive autophagy in NK cells, leading to increased association of the NKG2D receptor with AP2A1, AP2M1, LC3, and lysosomes, resulting in NKG2D endocytosis and lysosomal degradation that impairs NK cell function; this was demonstrated by immunoprecipitation after radiation exposure. |
Immunoprecipitation; immunofluorescence; Western blot |
Frontiers in immunology |
Low |
38077388
|
| 2025 |
AP2A1 is upregulated in replicatively senescent human fibroblasts along enlarged actin stress fibers; AP2A1 knockdown reversed senescence-associated phenotypes (rejuvenation), while overexpression in young cells accelerated senescence. AP2A1 co-localizes with integrin β1 and both move linearly along stress fibers, suggesting AP2A1 facilitates integrin β1 translocation to reinforce focal adhesion and anchorage in senescent cells. |
shRNA knockdown; overexpression; immunofluorescence co-localization; live-cell imaging; proteomics |
Cellular signalling |
Medium |
39848456
|
| 2025 |
AP2A1 physically interacts with and activates Rab7 (promotes GTP-loading) in neurons, facilitating recruitment of retrograde axonal transport proteins DIC1 and RILP, enhancing retrograde autophagosome transport, restoring autophagic flux, reducing Aβ accumulation, and improving behavioral deficits in Alzheimer's disease models. |
Co-immunoprecipitation; Rab7 pulldown activation assay; molecular docking; live-cell imaging; immunofluorescence; transmission electron microscopy; Western blot; ELISA; behavioral tests (Morris water maze, open field, object recognition, Y-maze) |
Alzheimer's research & therapy |
High |
40490761
|
| 2025 |
Ap2a1 binding to membrane μ-opioid receptors (MORs) in paraventricular thalamus (PVT) neurons regulates MOR trafficking (externalization); reduced Ap2a1–MOR binding was associated with increased membrane MOR levels after fentanyl contextual memory retrieval, and conditional knockdown of MOR in PVT demonstrated MOR's contribution to fentanyl contextual memory through modulation of PVT neuronal activity. |
Co-immunoprecipitation; Western blotting; proteomics; conditional knockdown; chemogenetic manipulation; c-Fos immunofluorescence |
Acta pharmacologica Sinica |
Medium |
41326807
|
| 2025 |
FMRP associates with AP2A1 mRNA and represses its translation; loss of FMRP in fragile X syndrome models leads to increased steady-state AP2A1 protein levels, enhanced AP-2-dependent endocytosis (including AMPA receptor endocytosis), which is rescued by shRNA downregulation of AP2B1 to wild-type levels. |
Quantitative mass spectrometry; FMRP RNA binding assay; Western blot; endocytosis functional assay; shRNA rescue |
iScience |
Medium |
40740492
|
| 2025 |
DNAJC5 interacts with AP2A1 and strengthens AP2A1's interaction with EGFR, promoting EGFR endocytosis and recycling in lung adenocarcinoma cells; knockdown of AP2A1 attenuated DNAJC5-driven EGFR endocytosis and cell proliferation/migration. |
Co-immunoprecipitation; knockdown experiments; in vitro and in vivo proliferation/migration assays |
Communications biology |
Medium |
40374748
|
| 2026 |
MDK (Midkine) activates the PI3K/AKT signaling pathway leading to increased AP2A1 expression, which in turn promotes epithelial-mesenchymal transition (EMT) in colorectal cancer cells; PI3K inhibitor LY294002 significantly reduces AP2A1 levels and inhibits MDK-induced malignant behaviors. |
Western blotting; PI3K inhibitor treatment; overexpression/knockdown; in vitro and in vivo functional assays |
Cancers |
Medium |
42073635
|