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Genetic interactions of conserved regions in the DEAD-box protein Prp28p

T H Chang1, L J Latus, Z Liu

  • 1Department of Molecular Genetics, The Ohio State University, Columbus, OH 43210, USA. chang.108@osu.edu

Nucleic Acids Research
|February 28, 1998
PubMed

Insights

Investigating the yeast PRP28 gene revealed insights into RNA splicing. Many mutations in conserved DEAD-box protein motifs suggest close structural proximity within Prp28p, aiding spliceosome assembly.

Area of Science:

  • Molecular Biology
  • RNA Biology
  • Biochemistry

Background:

  • The yeast PRP28 gene is crucial for nuclear precursor messenger RNA (pre-mRNA) splicing.
  • Prp28p, a DEAD-box protein (DBP), is involved in various RNA processing events.
  • DBPs are thought to function via RNA helicase activity, potentially in spliceosome activation.

Purpose of the Study:

  • To elucidate the function of Prp28p in RNA splicing.
  • To understand Prp28p's interactions within the splicing machinery.
  • To characterize conditional mutants of the PRP28 gene.

Main Methods:

  • Isolation and characterization of numerous conditional prp28 mutants.
  • Analysis of mutation localization within conserved DBP motifs.
  • Intragenic reversion analysis to infer protein structure.

Main Results:

  • Many prp28 mutations were found in highly conserved DBP motifs.
  • Intragenic reversion data suggest close spatial arrangement of motifs I, II, III, IV, and V in Prp28p.
  • This provides initial structural information about Prp28p.

Conclusions:

  • The study offers the first structural insights into Prp28p.
  • These findings may extend to the structural understanding of other DEAD-box proteins.
  • Understanding Prp28p structure is key to its role in spliceosome function.

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