Polaris, a protein involved in left-right axis patterning, localizes to basal bodies and cilia

被引:253
作者
Taulman, PD
Haycraft, CJ
Balkovetz, DF
Yoder, BK [1 ]
机构
[1] Univ Alabama Birmingham, Dept Cell Biol, Birmingham, AL 35294 USA
[2] Univ Alabama Birmingham, Dept Med, Birmingham, AL 35294 USA
[3] Vet Affairs Med Ctr, Birmingham, AL 35294 USA
关键词
D O I
10.1091/mbc.12.3.589
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Mutations in Tg737 cause a wide spectrum of phenotypes, including random left-right axis specification, polycystic kidney disease, liver and pancreatic defects, hydrocephalus, and skeletal patterning abnormalities. To further assess the biological function of Tg737 and its role in the mutant pathology, we identified the cell population expressing Tg737 and determined the subcellular localization of its protein product called Polaris. Tg737 expression is associated with cells possessing either motile or immotile cilia and sperm. Similarly, Polaris concentrated just below the apical membrane in the region of the basal bodies and within the cilia or flagellar axoneme. The data suggest that Polaris functions in a ciliogenic pathway or in cilia maintenance, a role supported by the loss of cilia on the ependymal cell layer in ventricles of Tg7370(orpk) brains and by the lack of node cilia in Tg737(Delta2-3 beta Gal) mutants.
引用
收藏
页码:589 / 599
页数:11
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