Translation factor and RNA binding protein mRNA interactomes support broader RNA regulons for posttranscriptional...

Area of Science:

• Molecular Biology
• Cell Biology
• Genetics

Background:

• Translational control is a key mechanism for rapid proteome modulation in eukaryotes.
• The recruitment of ribosomes to mRNA relies on translation initiation factors, but mRNA selection mechanisms remain unclear.
• Previous work identified variations in mRNA-translation factor interactions, suggesting distinct translation initiation modes.

Purpose of the Study:

• To investigate how cells select specific mRNAs for translation versus other cytoplasmic fates.
• To expand the understanding of mRNA interactions with proteins involved in cytoplasmic mRNA fate.
• To define global cytoplasmic mRNA binding modules coordinating the synthesis of functionally related proteins.

Main Methods:

• Analysis of mRNA interaction profiles with 12 key proteins involved in translation and RNA binding.
• Clustering of mRNAs into distinct groups based on these interaction profiles.
• Comparison of mRNA interaction profiles with those of other RNA-binding proteins.

Main Results:

• Seven distinct mRNA clusters were identified based on their interaction profiles with 12 factors.
• These mRNA clusters exhibit shared physical and functional characteristics.
• Identified patterns in interactions suggest functionally related mRNAs are grouped together.

Conclusions:

• Defined global cytoplasmic mRNA binding modules likely coordinate the synthesis of functionally related proteins.
• This framework provides a rationale for understanding different modes of translation initiation.
• The study advances our understanding of mRNA selection and cytoplasmic fate determination.