COPI transport complexes bind to specific RNAs in neuronal cells.

Abstract:

:Our fundamental understanding of how several thousand diverse RNAs are recognized in the soma, sorted, packaged, transported and localized within the cell is fragmentary. The COPa and COPb proteins of the coatomer protein I (COPI) vesicle complex were reported to interact with specific RNAs and represent a candidate RNA sorting and transport system. To determine the RNA-binding profile of Golgi-derived COPI in neuronal cells, we performed formaldehyde-linked RNA immunoprecipitation, followed by high-throughput sequencing, a process we term FLRIP-Seq (FLRIP, formaldehyde-cross-linked immunoprecipitation). We demonstrate that COPa co-immunoprecipitates a specific set of RNAs that are enriched in G-quadruplex motifs and fragile X mental retardation protein-associated RNAs and that encode factors that predominantly localize to the plasma membrane and cytoskeleton and function within signaling pathways. These data support the novel function of COPI in inter-compartmental trafficking of RNA.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Todd AG,Lin H,Ebert AD,Liu Y,Androphy EJ

doi

10.1093/hmg/dds480

subject

Has Abstract

pub_date

2013-02-15 00:00:00

pages

729-36

issue

4

eissn

0964-6906

issn

1460-2083

pii

dds480

journal_volume

22

pub_type

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