from Part II - Basic virology and viral gene effects on host cell functions: alphaherpesviruses
Published online by Cambridge University Press: 24 December 2009
Introduction
As in all herpesviruses, Herpes simplex nucleocapsids assembled in the nucleoplasm obtain an initial envelope by budding through the inner nuclear membrane of infected cells. This chapter will focus on the proteins responsible for nucleocapsid budding in the herpes simplex virus system. Of interest is the observation that orthologs of at least the UL31 and UL34 genes of herpes simplex virus genes likely mediate similar functions in members of both the beta- and gamma herpesvirinae (Muranyi et al., 2002; Gonnella et al., 2005). Thus, it is expected that this information will be relevant to the study of nucleocapsid envelopment of all herpesviruses.
Anatomy of the nuclear membrane: it's all connected
The nuclear envelope consists of two leaflets: the inner leaflet or inner nuclear membrane (INM) partitions the nucleoplasm from the lumen of the nuclear envelope, whereas the outer leaflet (ONM) contacts the cytoplasm. The space between the leaflets is ultimately continuous with the lumen of the endoplasmic reticulum. Both leaflets are continuous with the nuclear pore membrane that serves as an anchoring point for nuclear pore complexes (NPCs), which serve as conduits to mediate protein and RNA transport between the nucleus and cytoplasm.
The nuclear lamina lines the inner surface of the INM and is maintained in this orientation by interaction with both chromatin in the nucleoplasm, and integral membrane proteins specifically concentrated in the INM. How proteins are targeted to the INM has been the focus of active research for several years (Ellenberg et al., 1997; Ostlund et al., 1999; Soullam and Worman, 1993).
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.