| 2006 |
Hook2 localizes to the centrosome throughout all phases of the cell cycle via its C-terminal domain, which directly binds to centriolin/CEP110. Mislocalized wild-type or mutant Hook2 perturbs endogenous centrosomal and pericentrosomal proteins. Interference with Hook2 function results in loss of radial microtubule organization and defective microtubule regrowth after nocodazole-induced depolymerization. |
Direct binding assay (C-terminal domain of Hook2 and centriolin/CEP110), immunofluorescence localization through cell cycle, dominant-negative overexpression with centrosome/microtubule phenotype readout |
Traffic (Copenhagen, Denmark) |
High |
17140400
|
| 2007 |
Hook2 overexpression promotes accumulation of the cystic fibrosis transmembrane regulator (CFTR) in aggresomes without altering its biochemical properties or steady-state level. A dominant-negative form of Hook2 lacking the centriolin-binding C-terminal domain inhibits aggresome formation, indicating Hook2 contributes to pericentrosomal localization of aggresomes by promoting microtubule-based delivery of protein aggregates. |
Overexpression and dominant-negative expression of Hook2 with CFTR aggresome formation assay; immunofluorescence |
BMC cell biology |
Medium |
17540036
|
| 2008 |
Hook2 (along with Hook1 and Hook3) forms part of a multiprotein FTS-Hook-FHIP (FHF) complex. Hook proteins associate with a conserved C-terminal motif of FTS, form homo- and heterodimers, and the ~500-kDa FHF complex interacts with components of both class B and class C of the HOPS complex to promote vesicle trafficking and/or fusion. Hook2 can interact interchangeably with other Hook proteins within this complex. |
Proteomic analysis (mass spectrometry) of purified FTS complexes from HEK293T cells, yeast two-hybrid, co-immunoprecipitation, siRNA depletion with endosomal trafficking readout |
Molecular biology of the cell |
High |
18799622
|
| 2009 |
MSUT-2 (the human ortholog of C. elegans SUT-2) binds specifically to HOOK2 among the three human HOOK paralogs (HOOK1, HOOK2, HOOK3), as demonstrated by yeast two-hybrid and in vitro protein binding assays, suggesting the SUT-2/HOOK interaction is conserved across animal phyla. |
Yeast two-hybrid screen, in vitro protein binding assay |
Human molecular genetics |
Medium |
19273536
|
| 2009 |
CENP-F binds Hook2 at the centrosome, as identified by yeast two-hybrid screen and confirmed by co-immunoprecipitation. Ablation of CENP-F eliminates microtubule repolymerization from the centrosome after nocodazole treatment but not from the Golgi. Expression of a CENP-F truncation containing only the Hook2-binding domain recapitulates the centrosome-specific microtubule nucleation defect, indicating CENP-F acts through Hook2 at the centrosome. |
Yeast two-hybrid, co-immunoprecipitation with novel immunochemical reagents, CENP-F knockout cells with MT repolymerization assay, truncation expression |
Molecular biology of the cell |
High |
19793914
|
| 2011 |
Hook2 localizes at the Golgi apparatus and centrosome/basal body in human retinal epithelial cells. Hook2 depletion disrupts ciliogenesis before formation of the ciliary vesicle at the distal tip of the mother centriole. Hook2 interacts with and stabilizes PCM1 (pericentriolar material protein 1), and co-immunoprecipitates with GFP::Rab8a and PCM1 in a complex. Overexpression of GFP::Rab8a can rescue the ciliogenesis defect caused by Hook2 depletion. |
siRNA depletion with ciliogenesis phenotype readout, yeast two-hybrid, co-immunoprecipitation, GFP::Rab8a rescue experiment, immunofluorescence localization |
Molecular biology of the cell |
High |
21998199
|
| 2015 |
LRGUK-1 binds directly to HOOK2 via its GUK-like domain, as shown by yeast two-hybrid and co-immunoprecipitation. Both proteins co-localize to the manchette during spermatogenesis. Loss of LRGUK-1 causes defects in basal body attachment, axoneme extension, and manchette microtubule organization that may be mediated in part through its interaction with HOOK2. |
Yeast two-hybrid screen of adult testis library, co-immunoprecipitation/co-localization, domain mapping (GUK-like domain essential for HOOK2 binding), LRGUK-1 knockout mouse with spermatogenesis phenotype |
PLoS genetics |
Medium |
25781171
|
| 2016 |
LRGUK1 binds to HOOK2 (as well as HOOK1 and HOOK3) specifically through its GUK-like domain, confirmed by yeast two-hybrid and validated biochemically. All three HOOK proteins localize to the manchette, and LRGUK1 functions within a multiprotein complex (including HOOK proteins, RIMBP3, and KLC3) required for manchette-based microtubule dynamics in haploid male germ cells. |
Yeast two-hybrid screen, domain mapping (GUK-like domain required for HOOK2 binding), biochemical validation, co-localization studies |
FASEB journal |
Medium |
28003339
|
| 2016 |
Hook2 interacts with PAR6α via its C-terminal domain binding to the aPKC-binding domain of PAR6α, localizing PAR6α to the centrosome during polarized cell migration. Hook2 depletion decreases PAR6α at the centrosome and disrupts Golgi reorientation toward the migration front. Overexpression of Hook2 induces aggresome formation with recruitment of PAR6α, aPKC, and PAR3. |
Co-immunoprecipitation, domain mapping, siRNA depletion with Golgi reorientation and PAR6α localization readout, overexpression phenotype analysis |
Scientific reports |
Medium |
27624926
|
| 2020 |
The FHF complex interacts with the AP-4 adaptor protein complex via direct binding of the AP-4 μ4 subunit to coiled-coil domains in Hook1 and Hook2. Knockdown of FHF subunits (including Hook2) causes dispersal of AP-4 and its cargo ATG9A from the perinuclear region, consistent with FHF coupling organelles to dynein-dynactin for retrograde microtubule transport. |
Affinity purification-mass spectrometry, direct binding assay (μ4 subunit to Hook coiled-coil domains), siRNA knockdown with AP-4/ATG9A localization readout |
Molecular biology of the cell |
High |
32073997
|
| 2021 |
FTS-FHIP2A-Hook2 complexes associate with Rab1A-tagged ER-to-Golgi cargos, and FHIP2A is involved in the motility of Rab1A tubules. These Hook2-containing FHF complexes move with dynein and dynactin in single-molecule in vitro reconstitution assays. This contrasts with FTS-FHIP1B-Hook1/Hook3 complexes that associate with Rab5-positive early endosomes, demonstrating cargo specificity through combinatorial FHF assembly. |
Proteomic interactome of each FHIP protein, live-cell imaging, single-molecule in vitro reconstitution with dynein/dynactin, siRNA knockdown of FHIP2A with Rab1A tubule motility readout |
eLife |
High |
34882091
|
| 2021 |
Mitotic phosphorylation of LIC1-CTD (dynein light intermediate chain 1 C-terminal domain) at cdk1 sites engages the prolyl isomerase Pin1 predominantly to Hook2-dynein-Nde1-Lis1 complexes but not to dynein-spindly-dynactin complexes, indicating Hook2-containing dynein complexes are selectively regulated by mitotic phosphorylation and Pin1. |
Co-immunoprecipitation of endogenous complexes, phosphomutant analysis, cell biological phenotype readouts (kinetochore loading, chromosome congression, mitotic Golgi fragmentation) |
The Journal of cell biology |
Medium |
34709360
|
| 2013 |
In the ovarian cancer cell line SKOV-3, exon 14 of HOOK2 on chromosome 19 is fused with exon 2 of ACTN3 from chromosome 11 in a der(19)t(11;19) translocation, producing a fusion protein. The breakpoint in HOOK2 introduces a frameshift in ACTN3 predicted to cause loss of ACTN3 function; the fusion protein was detected by 2D Western blotting at the calculated molecular mass. |
Array-based breakpoint mapping, PCR spanning breakpoints on genomic DNA and cDNA, sequencing, 2D Western blotting |
Genes, chromosomes & cancer |
Medium |
23362175
|
| 2019 |
Hook2 is present at the midbody and centrosome during cytokinesis in human epithelial cells. Knockdown of Hook2 causes disappearance of LSR, tricellulin, PAR3, and other molecules from the centrosome during cytokinesis, while the epithelial barrier is maintained, indicating Hook2 is required for recruitment of multiple proteins to the centrosome during cell division. |
Immunofluorescence localization, siRNA knockdown with centrosome protein localization readout during cytokinesis |
The journal of histochemistry and cytochemistry |
Medium |
31662022
|
| 2025 |
HOOK2 mRNA is significantly upregulated in second-trimester amniotic fluid from women who later develop preeclampsia, and its expression increases with higher shear stress in trophoblast cells. Knockdown of HOOK2 significantly increases trophoblast invasion while migration shows no significant change, suggesting HOOK2 negatively regulates trophoblast invasiveness under hemodynamic stress conditions. |
RNA sequencing of amniotic fluid, siRNA knockdown in HTR-8/SVneo cells with invasion and migration assays under shear stress conditions |
International journal of molecular sciences |
Low |
41226568
|