English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Structure of a hexameric RNA packaging motor in a viral polymerase complex

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Huiskonen, J. T., Jaalinoja, H. T., Briggs, J. A. G., Fuller, S. D., & Butcher, S. J. (2007). Structure of a hexameric RNA packaging motor in a viral polymerase complex. Journal of Structural Biology, 158(2), 156-164. doi:10.1016/j.jsb.2006.08.021.


Cite as: https://hdl.handle.net/21.11116/0000-0009-709B-A
Abstract
Packaging of the Cystovirus phi 8 genome into the polymerase complex is catalysed by the hexameric P4 packaging motor. The motor is located at the fivefold vertices of the icosahedrally symmetric polymerase complex, and the symmetry mismatch between them may be critical for function. We have developed a novel image-processing approach for the analysis of symmetry-mismatched structures and applied it to cryo-electron microscopy images of P4 bound to the polymerase complex. This approach allowed us to solve the three-dimensional structure of the P4 in situ to 15-angstrom resolution. The C-terminal face of P4 was observed to interact with the polymerase complex, supporting the current view on RNA translocation. We suggest that the symmetry mismatch between the two components may facilitate the ring opening required for RNA loading prior to its translocation. (c) 2006 Elsevier Inc. All rights reserved.