Defining The Specificity of Cotranslationally Acting Chaperones by Systematic Analysis of mRNAs Associated with Ribosome-Nascent Chain Complexes
2011
Understanding How Proteins Are Directed in Cells
publication
Evidence: moderate
Author Information
Author(s): Marta del Alamo, Judith Frydman, others
Hypothesis
How are nascent proteins sorted and shepherded to the proper site for folding?
Conclusion
The study reveals that SRP and NAC play crucial roles in directing nascent proteins to their correct cellular locations.
Supporting Evidence
- SRP is mostly associated with proteins that have a transmembrane domain or a signal sequence.
- Some secretory proteins do not associate with SRP, indicating more complexity in protein targeting.
- NAC is associated with practically every translating ribosome in the cell.
Takeaway
When proteins are made in cells, they need help to get to the right place to work. This study shows how two helpers, SRP and NAC, guide them.
Methodology
The researchers used immunoprecipitation of ribosomes and SRP to identify mRNAs associated with nascent proteins in yeast cells.
Limitations
The study primarily focuses on yeast cells, which may limit the generalizability of the findings to other organisms.
Participant Demographics
Yeast cells were used as the model organism.
Digital Object Identifier (DOI)
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