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JCS ePress online publication date 8 Dec 2005
doi: 10.1242/jcs.02705

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Research Article

The genome of HSV-1 translocates through the nuclear pore as a condensed rod-like structure


Victor Shahin*, Wali Hafezi, Hans Oberleithner, Yvonne Ludwig, Barbara Windoffer, Hermann Schillers, and Joachim E. Kühn
* Author for correspondence (e-mail: vs297{at}cam.ac.uk)

Incoming herpes simplex virus type-1 (HSV-1) capsids are known to dock to the nuclear pore complex (NPC) and release their genome. It has remained elusive, however, how the huge viral DNA translocates through the comparatively small NPC channel. In the present study, the interaction of HSV-1 with NPCs was analyzed by atomic force microscopy. In addition to capsids, smaller subviral structures - most with a diameter of 35-40 nm and a length of 130-160 nm - were visualized at the cytoplasmic side of the NPC. These components differed from capsids in their adhesion and stiffness properties, and were the sole subviral structures translocated through dilated NPCs towards the nucleus. It is presumed that they are the HSV-1 genome, and that a change in NPC conformation allows translocation of this genome as a densely packaged, rod-like structure.




© The Company of Biologists Ltd 2005