Reference: de Bruyn Kops A and Guthrie C (2018) Identification of the Novel Nup188-brr7 Allele in a Screen for Cold-Sensitive mRNA Export Mutants in Saccharomyces cerevisiae. G3 (Bethesda) 8(9):2991-3003

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Abstract


The maturation and export of mRNA from the nucleus through the nuclear pore complex is critical for maintaining an appropriate proteome in all eukaryotic cells. Here we summarize a previously unpublished screen in S. cerevisiae that utilized an established dT50 in situ hybridization assay to identify cold-sensitive mutants that accumulated bulk poly A RNA in the nucleus. The screen identified seven mutants in six complementation groups, including the brr6-1 strain that we described previously. In addition to brr6-1, we identified novel alleles of the key transport gene GLE1 and NUP188, a component of the NIC96 nucleoporin complex. Notably, we show that the nup188-brr7 allele causes defects in select protein import pathways as well as mRNA export. Given recent structural and functional evidence linking the NIC96 complex to transport components, this mutant may be particularly useful to the transport community.

Reference Type
Journal Article | Research Support, N.I.H., Extramural | Research Support, Non-U.S. Gov't
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de Bruyn Kops A, Guthrie C
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