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-Structure paper
Title | Architecture of the baculovirus nucleocapsid revealed by cryo-EM. |
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Journal, issue, pages | Nat Commun, Vol. 14, Issue 1, Page 7481, Year 2023 |
Publish date | Nov 18, 2023 |
Authors | Xudong Jia / Yuanzhu Gao / Yuxuan Huang / Linjun Sun / Siduo Li / Hongmei Li / Xueqing Zhang / Yinyin Li / Jian He / Wenbi Wu / Harikanth Venkannagari / Kai Yang / Matthew L Baker / Qinfen Zhang / |
PubMed Abstract | Baculovirus Autographa californica multiple nucleopolyhedrovirus (AcMNPV) has been widely used as a bioinsecticide and a protein expression vector. Despite their importance, very little is known ...Baculovirus Autographa californica multiple nucleopolyhedrovirus (AcMNPV) has been widely used as a bioinsecticide and a protein expression vector. Despite their importance, very little is known about the structure of most baculovirus proteins. Here, we show a 3.2 Å resolution structure of helical cylindrical body of the AcMNPV nucleocapsid, composed of VP39, as well as 4.3 Å resolution structures of both the head and the base of the nucleocapsid composed of over 100 protein subunits. AcMNPV VP39 demonstrates some features of the HK97-like fold and utilizes disulfide-bonds and a set of interactions at its C-termini to mediate nucleocapsid assembly and stability. At both ends of the nucleocapsid, the VP39 cylinder is constricted by an outer shell ring composed of proteins AC104, AC142 and AC109. AC101(BV/ODV-C42) and AC144(ODV-EC27) form a C14 symmetric inner layer at both capsid head and base. In the base, these proteins interact with a 7-fold symmetric capsid plug, while a portal-like structure is seen in the central portion of head. Additionally, we propose an application of AlphaFold2 for model building in intermediate resolution density. |
External links | Nat Commun / PubMed:37980340 / PubMed Central |
Methods | EM (helical sym.) / EM (single particle) |
Resolution | 3.21 - 7.41 Å |
Structure data | EMDB-35242: The helical cylinder of Autographa californica multiple nucleopolyhedrovirus (AcMNPV) nucleocapsid EMDB-35243: The apical part of Autographa californica multiple nucleopolyhedrovirus (AcMNPV) EMDB-35244: The basal body of Autographa californica multiple nucleopolyhedrovirus (AcMNPV) EMDB-35245, PDB-8i8a: EMDB-35246, PDB-8i8b: EMDB-35247, PDB-8i8c: |
Source |
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Keywords | VIRAL PROTEIN / virus / capsid protein |