PreprintCited by 10Viral Infectious Diseases and Gene Expression in InsectsAdvanced Electron Microscopy Techniques and ApplicationsEnzyme Structure and Function

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Helical reconstruction of VP39 reveals principles for baculovirus nucleocapsid assembly

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Preprint — published as 10.1038/s41467-023-44596-y

Abstract

Baculoviruses are insect-infecting pathogens with wide applications as biological pesticides, in vitro protein production vehicles and gene therapy tools. Its cylindrical nucleocapsid, which encapsulates and protects the circular double-stranded viral DNA encoding proteins for viral replication and entry, is formed by the highly conserved major capsid protein VP39. The mechanism for VP39 assembly remains unknown. We determined a 3.2 Å electron cryomicroscopy helical reconstruction of an infectious nucleocapsid of Autographa californica multiple nucleopolyhedrovirus, revealing how dimers of VP39 assemble into a 14-stranded helical tube. We show that VP39 comprises a unique protein fold conserved across baculoviruses, which includes a Zinc finger domain and a stabilizing intra-dimer sling. Analysis of sample polymorphism revealed that VP39 assembles in several closely-related helical geometries. This VP39 reconstruction reveals general principles for baculoviral nucleocapsid assembly.

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Metadata

Authors
Benning, F. M. C., Jenni, S., Garcia, C. Y., Nguyen, T. H., Zhang, X., & Chao, L. H.
Affiliations
  • Harvard University (US)
  • Massachusetts General Hospital (US)
  • The University of Texas Southwestern Medical Center (US)
Corresponding author
Chao, Luke H.
Venue
Nature Communications
Publisher
openRxiv
Published
2023-06-15
Volume
15
Issue
1
Pages
250-250
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4390583912
Cited by
10
References
1
Citations by year
2025: 6 · 2024: 3 · 2023: 1
FWCI
1.23
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Nature Communications (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (submittedVersion, cc-by-nc-nd)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Science Foundation
  • U.S. Department of Health and Human Services (R35GM130289, R35GM142553)
  • Leona M. and Harry B. Helmsley Charitable Trust
  • Brandeis University
  • York University
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (180777)
  • National Institutes of Health
  • NYU Grossman School of Medicine
  • National Institute of General Medical Sciences (R35GM142553, R35GM130289)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Viral Infectious Diseases and Gene Expression in Insects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Advanced Electron Microscopy Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Enzyme Structure and Function
Keywords
baculovirus, nucleocapsid assembly, VP39, major capsid protein, Autographa californica nuclear polyhedrosis virus, helical reconstruction, zinc finger, protein dimerization, helical tubes

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