First published online December 21, 2005
Journal of Cell Science 119, 105e (2006)
© The Company of Biologists Limited
Nuclear pores: tight squeeze for viral DNA
Before eukaryotic DNA viruses can replicate, they must enter the host nucleus through nuclear pore complexes (NPCs) in the nuclear envelope. Human herpes simplex virus type 1 (HSV-1), like other large viruses, docks onto NPCs before releasing its genome from the viral capsid, but how the bulky genome gets through NPCs is a mystery. Victor Shahin and colleagues now report that the HSV-1 genome translocates through the NPCs of Xenopus oocytes as a condensed, rod-like structure (see p. 23). By using atomic force microscopy, the authors show that, in addition to capsids, subviral structures 30-40 nm wide and 130-160 nm long stick to the cytoplasmic side of NPCs in Xenopus oocytes. These subviral structures, which probably consist mainly of the viral genome, are the only viral structures to be translocated through the central channels of the NPCs, which widen considerably to allow their passage.

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Related articles in JCS:
- The genome of HSV-1 translocates through the nuclear pore as a condensed rod-like structure
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JCS 2006 119: 23-30.
[Abstract]
[Full Text]