CEP63

Last update 08 May 2025

Basic Info

Synonyms

centrosomal protein 63, Centrosomal protein of 63 kDa, CEP63

+ [1]

Introduction

Required for normal spindle assembly (PubMed:21406398, PubMed:21983783, PubMed:26297806, PubMed:35793002). Plays a key role in mother-centriole-dependent centriole duplication; the function seems also to involve CEP152, CDK5RAP2 and WDR62 through a stepwise assembled complex at the centrosome that recruits CDK2 required for centriole duplication (PubMed:21983783, PubMed:26297806). Reported to be required for centrosomal recruitment of CEP152; however, this function has been questioned (PubMed:21983783, PubMed:26297806). Also recruits CDK1 to centrosomes (PubMed:21406398). Plays a role in DNA damage response (PubMed:21406398). Following DNA damage, such as double-strand breaks (DSBs), is removed from centrosomes; this leads to the inactivation of spindle assembly and delay in mitotic progression (PubMed:21406398). Promotes stabilization of FXR1 protein by inhibiting FXR1 ubiquitination (PubMed:35989368).

100 Clinical Results associated with CEP63

100 Translational Medicine associated with CEP63

0 Patents (Medical) associated with CEP63

Literatures (Medical) associated with CEP63

18 Jun 2024·Proceedings of the National Academy of Sciences

Cep57 regulates human centrosomes through multivalent interactions

Article

Author: Chen, Ting ; Pang, Jia Meng ; Lin, Yu-Chun ; Jeng, U-Ser ; Shih, Orion ; Lin, Shiou-Lan ; Yeh, Hung-Wei ; Wang, Lily Hui-Ching ; Cheng, Hui-Chun ; Yeh, Tzu-Chen ; Hsia, Kuo-Chiang ; Chen, Po-Pang ; Chen, Yue-Ting ; Lin, Kai-Ti ; Lin, Wan-Ping

Human Cep57 is a coiled-coil scaffold at the pericentriolar matrix (PCM), controlling centriole duplication and centrosome maturation for faithful cell division. Genetic truncation mutations of Cep57 are associated with the mosaic-variegated aneuploidy (MVA) syndrome. During interphase, Cep57 forms a complex with Cep63 and Cep152, serving as regulators for centrosome maturation. However, the molecular interplay of Cep57 with these essential scaffolding proteins remains unclear. Here, we demonstrate that Cep57 undergoes liquid–liquid phase separation (LLPS) driven by three critical domains (NTD, CTD, and polybasic LMN). In vitro Cep57 condensates catalyze microtubule nucleation via the LMN motif-mediated tubulin concentration. In cells, the LMN motif is required for centrosomal microtubule aster formation. Moreover, Cep63 restricts Cep57 assembly, expansion, and microtubule polymerization activity. Overexpression of competitive constructs for multivalent interactions, including an MVA mutation, leads to excessive centrosome duplication. In Cep57-depleted cells, self-assembly mutants failed to rescue centriole disengagement and PCM disorganization. Thus, Cep57’s multivalent interactions are pivotal for maintaining the accurate structural and functional integrity of human centrosomes.

01 Jan 2024·International Journal of Medical Sciences

What happens to the osteoporotic bone mesenchymal stem cells? Evidence from RNA sequencing

Article

Author: Fu, Qin ; Cong, Rong ; Wang, Huadong ; Ma, Chao ; Li, Mingyang ; Li, Li ; Lv, Yongwei ; Zhao, Yantao ; Zheng, Yang

Evidence presented that osteoporosis is closely related to the dysfunction of bone mesenchymal stem cells (BMSCs). But most studies are insufficient to reveal what actually happens to the osteoporotic BMSCs. In this study, BMSCs were harvested from ovariectomized and sham-operated rats. After checking the characteristics of rat models and stem cells, the BMSCs were carried out for RNA sequencing. Part of the findings were verified that seven mRNAs (Abi3bp, Aifm3, Ccl11, Cdkn1c, Chst10, Id2, Vcam1) were significantly up-regulated in osteoporotic BMSCs while seven mRNAs (Cep63, Fgfr3, Myc, Omd, Pou2f1, Smarcal1, Timm10b) were down-regulated. In addition, potential miRNA-mRNA and lncRNA-mRNA regulatory networks were illustrated. The changes in osteoporotic BMSCs covered a large set of biological processes, including cell viability, differentiation, immunoreaction, bone repairment and estrogen defect. This study enriched the pathophysiological mechanisms of BMSCs and osteporosis, as well as provided dozens of attractive RNA targets for further treatment.

04 Dec 2023·The Journal of cell biology

Centrosomal organization of Cep152 provides flexibility in Plk4 and procentriole positioning.

Article

Author: Sullenberger, Catherine ; Luvsanjav, Delgermaa ; Avazpour, Pegah ; Kong, Dong ; Loncarek, Jadranka

Centriole duplication is a high-fidelity process driven by Polo-like kinase 4 (Plk4) and a few conserved initiators. Dissecting how Plk4 and its receptors organize within centrosomes is critical to understand the centriole duplication process and biochemical and architectural differences between centrosomes of different species. Here, at nanoscale resolution, we dissect centrosomal localization of Plk4 in G1 and S phase in its catalytically active and inhibited state during centriole duplication and amplification. We build a precise distribution map of Plk4 and its receptor Cep152, as well as Cep44, Cep192, and Cep152-anchoring factors Cep57 and Cep63. We find that Cep57, Cep63, Cep44, and Cep192 localize in ninefold symmetry. However, during centriole maturation, Cep152, which we suggest is the major Plk4 receptor, develops a more complex pattern. We propose that the molecular arrangement of Cep152 creates flexibility for Plk4 and procentriole placement during centriole initiation. As a result, procentrioles form at variable positions in relation to the mother centriole microtubule triplets.

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CEP63

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