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TitleThe structure of avian polyomavirus reveals variably sized capsids, non-conserved inter-capsomere interactions, and a possible location of the minor capsid protein VP4.
Journal, issue, pagesVirology, Vol. 411, Issue 1, Page 142-152, Year 2011
Publish dateMar 1, 2011
AuthorsPeter S Shen / Dirk Enderlein / Christian D S Nelson / Weston S Carter / Masaaki Kawano / Li Xing / Robert D Swenson / Norman H Olson / Timothy S Baker / R Holland Cheng / Walter J Atwood / Reimar Johne / David M Belnap /
PubMed AbstractAvian polyomavirus (APV) causes a fatal, multi-organ disease among several bird species. Using cryogenic electron microscopy and other biochemical techniques, we investigated the structure of APV and ...Avian polyomavirus (APV) causes a fatal, multi-organ disease among several bird species. Using cryogenic electron microscopy and other biochemical techniques, we investigated the structure of APV and compared it to that of mammalian polyomaviruses, particularly JC polyomavirus and simian virus 40. The structure of the pentameric major capsid protein (VP1) is mostly conserved; however, APV VP1 has a unique, truncated C-terminus that eliminates an intercapsomere-connecting β-hairpin observed in other polyomaviruses. We postulate that the terminal β-hairpin locks other polyomavirus capsids in a stable conformation and that absence of the hairpin leads to the observed capsid size variation in APV. Plug-like density features were observed at the base of the VP1 pentamers, consistent with the known location of minor capsid proteins VP2 and VP3. However, the plug density is more prominent in APV and may include VP4, a minor capsid protein unique to bird polyomaviruses.
External linksVirology / PubMed:21239031 / PubMed Central
MethodsEM (single particle)
Resolution11.3 - 23.0 Å
Structure data

5180

3iys

EMDB-5180: The structure of avian polyomavirus treated with 250 mM L-arginine
PDB-3iys: Homology model of avian polyomavirus asymmetric unit
Method: EM (single particle) / Resolution: 11.4 Å

EMDB-5181:
The structure of avian polyomavirus (empty capsids) treated with 250 mM L-arginine
Method: EM (single particle) / Resolution: 17.3 Å

EMDB-5182:
The structure of simian virus 40 virus-like particles
Method: EM (single particle) / Resolution: 13.8 Å

EMDB-5183:
The structure of JC polyomavirus (pH 7.4)
Method: EM (single particle) / Resolution: 19.0 Å

EMDB-5184:
The structure of JC polyomavirus treated with 250 mM L-arginine (pH 10.7)
Method: EM (single particle) / Resolution: 17.6 Å

EMDB-5187:
Cryo-EM of SV40 Virion
Method: EM (single particle) / Resolution: 23.0 Å

Source
  • budgerigar fledgling disease polyomavirus
KeywordsVIRUS / avian / polyomavirus / APV / icosahedral virus

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