國家衛生研究院 NHRI:Item 3990099045/2267

NHRI > Institute of Molecular and Genomic Medicine > Chi-Ying F. Huang(1998-2005) > Periodical Articles > Item 3990099045/2267

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/2267

Title:	Molecular characterization of human ninein protein: two distinct subdomains required for centrosomal targeting and regulating signals in cell cycle
Authors:	Chen, CH;Howng, SL;Cheng, TS;Chou, MH;Huang, CY;Hong, YR
Contributors:	Division of Molecular and Genomic Medicine
Abstract:	The centrosomal protein ninein has been identified as a microtubules minus end capping, centriole position, and anchoring protein, but the true physiological function remains to be determined. In this report, using immunofluorescence analysis and GFP-fusions we show that coiled-coil II domain (CCII domain, 1303-2096) co-localized with gamma-tubulin and centrin at the centrosome. We further narrow down within 83 amino acids and classify a new centrosomal targeting signal. Interestingly, antibodies raised against CCII domain reveal that ninein protein declines from spindle poles during mitosis, but reaccumulates at centrosomes at the end of cell division. Moreover, the data also suggest that fragment 1783-1866 may be attributed to declined signal of ninein. In kinase assay, we show that CCII domain could readily be phosphorylated by AIK and PKA. Taken together, our results suggest that ninein protein contains two distinct subdomains which are required for targeting and regulating asymmetry centrosomes. Importantly, the decline of ninein during mitosis implies that this centrosomal protein may play a role to regulate the process of chromosome segregation without discrimination. The model we propose here will foster a clearer picture of how two asymmetric centrosomes could direct and ensure the correct segregation of chromosomes during the mitotic stage. (C) 2003 Elsevier Inc. All rights reserved.
Keywords:	Biochemistry & Molecular Biology;Biophysics
Date:	2003-09-05
Relation:	Biochemical and Biophysical Research Communications. 2003 Sep;308(4):975-983.
Link to:	http://dx.doi.org/10.1016/S0006-291X(03)01510-9
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0006-291X&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000185168200045
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0042661000
Appears in Collections:	[Chi-Ying F. Huang(1998-2005)] Periodical Articles

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