| 2007 |
siRNA depletion of Cep192 in human cells causes complete loss of functional centrosomes in mitotic (but not interphase) cells, with loss of γ-tubulin, pericentrin, and other PCM proteins from centrosomes, establishing Cep192 as an essential component of centrosome maturation machinery and PCM scaffold assembly during mitosis. |
siRNA knockdown with immunofluorescence readout of γ-tubulin, pericentrin, and spindle assembly; overexpression studies showing ectopic γ-tubulin/pericentrin foci |
Current biology : CB |
High |
17980596
|
| 2008 |
Cep192 (human homolog of C. elegans SPD-2) is a major regulator of PCM recruitment, centrosome maturation, and centriole duplication in mammalian cells; Cep192 and Pericentrin are mutually dependent for localization to mitotic centrosomes, and both are required for NEDD-1 (GCP-WD) recruitment and subsequent γ-TuRC assembly. |
siRNA knockdown, reciprocal co-immunoprecipitation, immunofluorescence |
Current biology : CB |
High |
18207742
|
| 2010 |
Cep192 directly interacts with Aurora A (AurA), targets AurA to mitotic centrosomes, and promotes AurA dimerization/oligomerization that triggers potent kinase activation driving microtubule assembly. This Cep192-mediated activation mechanism is distinct from TPX2-mediated AurA activation on microtubules. Depletion of Cep192 or interference with AurA–Cep192 binding abolishes centrosomal AurA activity and microtubule assembly. |
Co-immunoprecipitation, in vitro kinase assay, siRNA depletion, antibody-induced dimerization, dominant-negative interference |
Proceedings of the National Academy of Sciences of the United States of America |
High |
21097701
|
| 2012 |
CEP192 interacts with the K63-deubiquitinase CYLD (identified by mass spectrometry) and NEDD1; co-depletion of CYLD alleviates the bipolar spindle assembly defects caused by CEP192 depletion, placing CYLD downstream of CEP192 in regulating the spindle microtubule landscape. |
Mass spectrometry interactome, co-immunoprecipitation, double siRNA knockdown with spindle assembly phenotype readout |
Cell cycle (Georgetown, Tex.) |
Medium |
22895009
|
| 2013 |
Cep192 plays a key role in centrosome recruitment of both Cep152 and Plk4; Cep192 directly binds Plk4 through an N-terminal extension specific to its largest isoform (binding region rich in negatively charged residues interacting with the positively charged polo-box domain of Plk4); double-depletion of Cep192 and Cep152 completely abolishes Plk4 binding to centrioles and centriole duplication. |
siRNA depletion (single and double), co-immunoprecipitation, domain mapping, immunofluorescence |
Journal of cell science |
High |
23641073
|
| 2013 |
Cep192 and Cep152 serve as two distinct, hierarchically ordered scaffolds that recruit Plk4 to centrosomes; both proteins competitively interact with the cryptic polo box of Plk4 through homologous N-terminal sequences containing acidic-α-helix and N/Q-rich motifs; loss of either Cep192- or Cep152-dependent Plk4 interaction impairs centriole duplication. |
Co-immunoprecipitation, domain competition assays, siRNA depletion, immunofluorescence, proximity ligation |
Proceedings of the National Academy of Sciences of the United States of America |
High |
24277814
|
| 2013 |
PHD1 prolyl-4-hydroxylase hydroxylates Cep192 on proline residue 1717; this hydroxylation is required for binding of the SCF(Skp2) E3 ubiquitin ligase, which ubiquitinates Cep192 and targets it for proteasomal degradation. By modulating Cep192 protein levels, PHD1 connects oxygen/metabolic sensing to centriole duplication and centrosome maturation. |
Mass spectrometry to identify hydroxylation site, site-directed mutagenesis (P1717), co-immunoprecipitation with SCF(Skp2), ubiquitination assay, siRNA depletion, proteasomal inhibitor treatment |
Developmental cell |
High |
23932902
|
| 2014 |
In interphase cells, Cep192 promotes centrosomal microtubule nucleation by recruiting γ-tubulin; however, Cep192 maintains an antagonistic relationship with Pericentrin at interphase centrosomes (depletion of Cep192 increases centrosomal Pericentrin, and vice versa). Depletion of Cep192 impairs cell motility and alters cell polarization. |
siRNA knockdown, overexpression, immunofluorescence quantification of γ-tubulin and Pericentrin, microtubule regrowth assay, cell motility assay |
PloS one |
Medium |
24971877
|
| 2015 |
Plk1 interacts with Cep192 through two distinct phosphorylated motifs: p-T44 (analogous to Xenopus p-T46) via its polo-box domain, which is preferred when AurA is bound to Cep192, and a newly identified p-S995 motif preferred in the absence of AurA. Loss of both Cep192–Plk1 interactions additively impairs Plk1 and γ-tubulin recruitment to centrosomes and bipolar spindle formation. |
Co-immunoprecipitation with phospho-specific motif analysis, site-directed mutagenesis, siRNA depletion, immunofluorescence, in vitro binding assay |
Molecular and cellular biology |
High |
26012549
|
| 2015 |
SPD-2/CEP192 and CDK activity from mitotic cells are rate-limiting for MTOC function at the centrosome; cell fusion experiments in live C. elegans embryos show that the centrosome MTOC state is dominant and reactivated by SPD-2/CEP192 and CDK from a mitotic partner cell. |
Cell fusion experiments in live C. elegans embryos, fluorescence live imaging, genetic analysis |
Current biology : CB |
Medium |
26119750
|
| 2017 |
CEP192 recruits protein phosphatase 1 (PP1) via a highly conserved KHVTF docking motif; the threonine in this motif is phosphorylated during mitosis in a PLK1-dependent manner. |
Peptide pull-down, co-immunoprecipitation, phospho-site identification, kinase inhibitor studies |
Biochemical and biophysical research communications |
Medium |
28188792
|
| 2017 |
CIP2A is reciprocally associated with CEP192 and acts as a scaffold promoting CEP192-mediated MTOC assembly by recruiting Aurora A and Plk1 at spindle poles during mouse oocyte meiotic maturation; CIP2A is phosphorylated by Plk1 at S904, which targets CIP2A to MTOCs. |
Co-immunoprecipitation, microinjection-based depletion (morpholino/antibody), immunofluorescence, site-directed mutagenesis |
Development (Cambridge, England) |
Medium |
28935709
|
| 2018 |
FBXL13 (SCF-family F-box protein) interacts with CEP192 at centrosomes and specifically targets CEP192 for proteasomal degradation; FBXL13-induced CEP192 degradation downregulates centrosomal γ-tubulin and disrupts centrosomal microtubule arrays, while FBXL13 depletion causes CEP192 and γ-tubulin accumulation with cell motility defects. |
Co-immunoprecipitation, ubiquitination assay, inducible overexpression, siRNA depletion, immunofluorescence |
EMBO reports |
Medium |
29348145
|
| 2018 |
In mouse oocytes lacking centrioles, Cep192 is required for MTOC integrity; Cep192 depletion ablates MTOCs, delays spindle formation, and causes abnormal chromosomal alignment. CDK1 activity regulates Cep152 exclusion from MTOCs (but not Cep192 removal), establishing distinct regulatory mechanisms for the two proteins. |
Microinjection-based depletion (morpholino), immunofluorescence, CDK1 inhibitor treatment, live imaging |
FASEB journal |
Medium |
28970258
|
| 2020 |
Cep215 (CDK5RAP2) contains a mitosis-specific centrosome-targeting domain (215N) that directly interacts with Cep192 and phosphorylated Aurora A; Cep192 is essential for targeting 215N to centrosomes, and centrosomal localization of 215N and phospho-AurA is mutually dependent. |
Co-immunoprecipitation, domain deletion/truncation analysis, siRNA depletion, immunofluorescence, rescue experiments |
Journal of cell science |
Medium |
33376154
|
| 2021 |
CEP192 recruitment to spindle poles during mitosis requires cooperative input from the centriole wall and PCM scaffold proteins pericentrin and CDK5RAP2; CEP192 remaining at centriole walls is sufficient for bipolar spindle formation when PCM scaffolds are absent, but pericentrin and CDK5RAP2 can recruit CEP192 at acentriolar spindle poles, with PLK1 activity required for this PCM-based pathway. |
Systematic siRNA double and triple depletions, centriole removal by Plk4 inhibition, immunofluorescence, multiple cell line validation (HeLa, RPE1, A549) |
The Journal of cell biology |
High |
33443571
|
| 2023 |
Crystal structure of a conserved helix (Helix-1) of CEP192 bound to Aurora A (AURKA) revealed a distinct binding site different from the TPX2 binding site; disrupting the Helix-1–AURKA interaction in cells prevented centrosomal accumulation of AURKA, reduced activation-loop phosphorylation of AURKA, and caused mitotic defects. |
Crystal structure (X-ray crystallography), quantitative binding studies, cell-based interference (Helix-1 domain deletion), immunofluorescence for AURKA localization |
Science advances |
High |
37083534
|
| 2024 |
CEP192 wraps around Aurora A and occupies binding sites used by spindle-associated partners, competing with them. CEP192 interaction with Aurora A modifies kinase activity through the same site used for TPX2-mediated activation. Deleting the Aurora A-binding interface in CEP192 prevents centrosomal Aurora A accumulation, reduces activation-loop phosphorylation, and decreases spindle-bound TPX2:Aurora A complexes, resulting in error-prone mitosis. CEP192 thereby supplies the pool of phosphorylated Aurora A required for TPX2 binding on spindles. |
Crystal structure/cryo-EM structural comparison, mutagenesis of CEP192 Aurora A-binding interface, immunofluorescence, cell-based spindle phenotype analysis |
The EMBO journal |
High |
39327527
|
| 2025 |
Crystal structures of the human and honeybee Spd-2 domain (SP2D) of CEP192 revealed an unusual 'extended cradle' structure formed by two closely spaced ASH domains with a conserved interaction interface. The SP2D does not target CEP192 to centrosomes but promotes PCM scaffold assembly; PLK1-dependent phosphorylation of Drosophila SP2D drives higher-order oligomerization, and mutations at the oligomerization interface perturb PCM scaffold assembly in vivo. |
X-ray crystallography (human and honeybee SP2D), in vitro phosphorylation by PLK1, SEC-MALS oligomerization assay, Drosophila in vivo functional rescue with interface mutants, AlphaFold predictions |
Science advances |
High |
40106572
|
| 2025 |
CEP192 loss by auxin-inducible degron in live mice decreased γ-tubulin recruitment to centrosomes, impaired mitotic spindle assembly, and caused cell division failure and cell death in proliferative tissues, but did not affect centriole duplication. |
AID2 auxin-inducible degron system in vivo, immunofluorescence for γ-tubulin and spindle markers, histological analysis of proliferative tissues |
Science advances |
High |
40020058
|
| 2025 |
In C. elegans, SPD-2 (CEP192 ortholog) is a substrate of APC/C(FZR-1); SPD-2 physically associates with FZR-1 in vivo, and canonical D-box motifs (D-box1, D-box2, D-box3) each contribute to SPD-2 degradation with distinct functional consequences for centrosomal localization and centriole duplication. |
In vivo co-immunoprecipitation (SPD-2 with FZR-1), D-box mutagenesis, genetic epistasis with zyg-1 mutants, fluorescence quantification of centrosomal SPD-2 levels |
bioRxivpreprint |
Medium |
bio_10.1101_2025.10.14.682142
|
| 2025 |
CEP192 (through its centrosomal localization) is a key activator of Plk1 specifically for the centriole disengagement step of the centrosome cycle; Bora drives Plk1 activation for mitotic entry and centrosome maturation whereas CEP192 and Cenexin control a distinct Plk1 pool governing centriole disengagement. Additionally, Plk1 and CEP192 promote replication origin firing during S-phase. |
Selective depletion of Plk1 coactivators (Bora, Cep192, Cenexin) with cell-cycle stage-specific phenotype readouts, DNA replication assays |
bioRxivpreprint |
Medium |
bio_10.1101_2025.09.30.679461
|
| 2026 |
Nur77 phosphorylated at Thr143 by Cdk1 accumulates at the centrosome during mitosis and directly binds CEP192; this interaction maintains centrosome integrity in tumor cells and facilitates PLK1 recruitment to centrosomes. Disruption of the Nur77–CEP192 interaction (by siRNA or the small molecule NMA39) causes mitotic arrest. |
Co-immunoprecipitation, site-directed mutagenesis (T143), immunofluorescence, small-molecule inhibitor (NMA39), siRNA depletion |
Cell death & disease |
Medium |
42236697
|