The Structure of an RNAi Polymerase Links RNA Silencing and Transcription
Author Information
Author(s): Paula S. Salgado, Minni R. L. Koivunen, Eugene V. Makeyev, Dennis H. Bamford, David I. Stuart, Jonathan M. Grimes
Primary Institution: Oxford University, United Kingdom
Hypothesis
How does the structure of the RNAi polymerase QDE-1 from Neurospora crassa relate to RNA silencing and transcription mechanisms?
Conclusion
The study reveals that the structure of the RNAi polymerase QDE-1 is similar to DNA-dependent RNA polymerases, suggesting an evolutionary link between RNA silencing and transcription.
Supporting Evidence
- The crystal structure of QDE-1 was solved to a resolution of 2.3 Å.
- QDE-1 forms a dimeric structure with two subunits that are closely related.
- The active site of QDE-1 shows significant similarity to that of DNA-dependent RNA polymerases.
Takeaway
Scientists studied a protein that helps silence genes in certain organisms and found that it looks a lot like another protein that helps make genes work, showing they might be related.
Methodology
The high-resolution crystal structure of QDE-1 was determined using multiwavelength anomalous diffraction (MAD) analysis.
Digital Object Identifier (DOI)
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