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Monitoring Protein-RNA Interaction Dynamics In Vivo at High Temporal Resolution Using χCRAC
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Crystallization of a ZRANB2-RNA complex.

Fionna E Loughlin1, Mihwa Lee, J Mitchell Guss

  • 1School of Molecular and Microbial Biosciences, University of Sydney, Sydney, NSW, Australia.

Acta Crystallographica. Section F, Structural Biology and Crystallization Communications
|December 5, 2008
PubMed
Summary

ZRANB2, a protein influencing alternative splicing, has two zinc fingers crucial for RNA recognition. Structural analysis revealed its second zinc finger binding to RNA, providing insights into splicing regulation.

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Area of Science:

  • Molecular Biology
  • Structural Biology
  • Genetics

Background:

  • ZRANB2 is a zinc-finger protein involved in alternative splice-site selection.
  • It possesses an arginine/serine-rich domain interacting with spliceosomal proteins.
  • Two N-terminal RanBP2-type zinc fingers are implicated in RNA recognition.

Purpose of the Study:

  • To elucidate the structural basis of ZRANB2's RNA recognition.
  • To understand the role of its zinc fingers in alternative splicing.

Main Methods:

  • X-ray crystallography was employed to determine the structure.
  • Synchrotron radiation was used for data collection to 1.4 A resolution.

Main Results:

  • The second zinc finger of ZRANB2 was found to bind a six-nucleotide single-stranded RNA target sequence.
  • The crystal structure was determined in the hexagonal space group P6(5)22 or P6(1)22.
  • The crystal form exhibited a solvent content of 39%.

Conclusions:

  • The study provides the first structural insights into ZRANB2-RNA interaction.
  • This structural information is vital for understanding ZRANB2's function in alternative splicing regulation.