Abstract:
:Adeno-associated virus (AAV) is a member of the Parvoviridae, belonging to the Dependovirus genus. Currently, several distinct isolates of AAV are in development for use in human gene therapy applications due to their ability to transduce different target cells. The need to manipulate AAV capsids for specific tissue delivery has generated interest in understanding their capsid structures. The structure of AAV type 4 (AAV4), one of the most antigenically distinct serotypes, was determined to 13-A resolution by cryo-electron microscopy and image reconstruction. A pseudoatomic model was built for the AAV4 capsid by use of a structure-based sequence alignment of its major capsid protein, VP3, with that of AAV2, to which AAV4 is 58% identical and constrained by its reconstructed density envelope. The model showed variations in the surface loops that may account for the differences in receptor binding and antigenicity between AAV2 and AAV4. The AAV4 capsid surface topology also shows an unpredicted structural similarity to that of Aleutian mink disease virus and human parvovirus B19, autonomous members of the genus, despite limited sequence homology.
journal_name
J Viroljournal_title
Journal of virologyauthors
Padron E,Bowman V,Kaludov N,Govindasamy L,Levy H,Nick P,McKenna R,Muzyczka N,Chiorini JA,Baker TS,Agbandje-McKenna Mdoi
10.1128/JVI.79.8.5047-5058.2005subject
Has Abstractpub_date
2005-04-01 00:00:00pages
5047-58issue
8eissn
0022-538Xissn
1098-5514pii
79/8/5047journal_volume
79pub_type
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