F97L Hepatitis B core protein capsid

Experimental Data Snapshot

  • Resolution: 2.64 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Structure of Mutant Hepatitis B Core Protein Capsids with Premature Secretion Phenotype.

Bottcher, B.Nassal, M.

(2018) J Mol Biol 430: 4941-4954

  • DOI: https://doi.org/10.1016/j.jmb.2018.10.018
  • Primary Citation of Related Structures:  
    6HTX, 6HU4, 6HU7

  • PubMed Abstract: 

    Hepatitis B virus is a major human pathogen that consists of a viral genome surrounded by an icosahedrally ordered core protein and a polymorphic, lipidic envelope that is densely packed with surface proteins. A point mutation in the core protein in which a phenylalanine at position 97 is exchanged for a smaller leucine leads to premature envelopment of the capsid before the genome maturation is fully completed. We have used electron cryo-microscopy and image processing to investigate how the point mutation affects the structure of the capsid at 2.6- to 2.8 Å-resolution. We found that in the mutant the smaller side chain at position 97 is displaced, increasing the size of an adjacent pocket in the center of the spikes of the capsid. In the mutant, this pocket is filled with an unknown density. Phosphorylation of serine residues in the unresolved C-terminal domain of the mutant leaves the structure of the ordered capsid largely unchanged. However, we were able to resolve several previously unresolved residues downstream of proline 144 that precede the phosphorylation-sites. These residues pack against the neighboring subunits and increase the inter-dimer contact suggesting that the C-termini play an important role in capsid stabilization and provide a much larger interaction interface than previously observed.

  • Organizational Affiliation

    Department of Biochemistry, Cryo Electron Microscopy, Julius Maximillian's University, Josef-Schneider Straße 2, 97080 Würzburg, Germany. Electronic address: bettina.boettcher@uni-wuerzburg.de.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid protein183Hepatitis B virusMutation(s): 1 
Find proteins for P03146 (Hepatitis B virus genotype D subtype ayw (isolate France/Tiollais/1979))
Explore P03146 
Go to UniProtKB:  P03146
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03146
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.64 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research FoundationGermanyNa154/9-4

Revision History  (Full details and data files)

  • Version 1.0: 2018-12-26
    Type: Initial release
  • Version 1.1: 2019-12-11
    Changes: Other