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XB-ART-52470
Dev Cell 2016 Sep 12;385:478-92. doi: 10.1016/j.devcel.2016.08.002.
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Congenital Heart Disease Genetics Uncovers Context-Dependent Organization and Function of Nucleoporins at Cilia.

Del Viso F, Huang F, Myers J, Chalfant M, Zhang Y, Reza N, Bewersdorf J, Lusk CP, Khokha MK.


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Human genomics is identifying candidate genes for congenital heart disease (CHD), but discovering the underlying mechanisms remains challenging. In a patient with CHD and heterotaxy (Htx), a disorder of left-right patterning, we previously identified a duplication in Nup188. However, a mechanism to explain how a component of the nuclear pore complex (NPC) could cause Htx/CHD was undefined. Here, we show that knockdown of Nup188 or its binding partner Nup93 leads to a loss of cilia during embryonic development while leaving NPC function largely intact. Many data, including the localization of endogenous Nup188/93 at cilia bases, support their direct role at cilia. Super-resolution imaging of Nup188 shows two barrel-like structures with dimensions and organization incompatible with an NPC-like ring, arguing against a proposed "ciliary pore complex." We suggest that the nanoscale organization and function of nucleoporins are context dependent in a way that is required for the structure of the heart.

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Species referenced: Xenopus tropicalis
Genes referenced: actb arl13b cep290 dand5 foxj1 nup133 nup188 nup62 nup93 pitx2 tuba4a tubg1
GO keywords: heart looping [+]
???displayArticle.antibodies??? Nuclear Pore Complex Ab1 Tuba4a Ab15 Tubg1 Ab4
???displayArticle.morpholinos??? nup133 MO1 nup188 MO1 nup62 MO1 nup93 MO1

???displayArticle.disOnts??? visceral heterotaxy [+]
Phenotypes: Xtr Wt + Hsa.NUP188(Fig. S 2 A) [+]

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References [+] :
Alber, The molecular architecture of the nuclear pore complex. 2007, Pubmed