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Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells
10:06

Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells

Published on: April 26, 2017

Fanconi anemia FANCD2 and FANCI proteins regulate the nuclear dynamics of splicing factors

María Moriel-Carretero1, Sara Ovejero1, Marie Gérus-Durand1

  • 1Institute of Human Genetics, Centre National de la Recherche Scientifique UMR 9002, Université de Montpellier, Montpellier, France.

The Journal of Cell Biology
|October 15, 2017
PubMed

Insights

Fanconi anemia (FA) proteins FANCI and FANCD2 associate with splicing factor SF3B1. This interaction helps maintain chromosomal stability by coordinating DNA replication and RNA splicing during replication stress.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Fanconi anemia (FA) is a cancer-prone disorder linked to chromosomal instability.
  • FA proteins are crucial for DNA replication, repair, and managing conflicts between replication and transcription.
  • The spliceosome, particularly SF3B1, is essential for RNA processing.

Purpose of the Study:

  • To investigate the interaction between FA proteins (FANCI, FANCD2) and splicing factor SF3B1.
  • To elucidate the role of this interaction in maintaining chromosomal stability during DNA replication stress.

Main Methods:

  • Immunofluorescence microscopy to assess protein localization (FANCI, SF3B1).
  • Analysis of protein association under conditions of DNA replication stress.
  • Assays to evaluate the impact on splicing factor dynamics and intron lariat accumulation.

Main Results:

  • FANCI and FANCD2 directly associate with SF3B1, a key spliceosomal component.
  • DNA replication stress triggers SF3B1 release from nuclear speckles, dependent on FANCI and ATR kinase.
  • FANCI and FANCD2 binding to SF3B1 prevents intron lariat accumulation and promotes splicing factor eviction from chromatin.

Conclusions:

  • FANCI and FANCD2 play a role in organizing chromatin functional domains.
  • These FA proteins coordinate DNA replication with cotranscriptional processes, contributing to genome stability.

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