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Updated: Sep 27, 2025

Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle
Published on: February 1, 2017
Spacer Domain in Hepatitis B Virus Polymerase: Plugging a Hole or Performing a Role?
Caitlin Pley1,2, José Lourenço3,4, Anna L McNaughton5,6
1School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom.
Abstract:
Hepatitis B virus (HBV) polymerase is divided into terminal protein, spacer, reverse transcriptase, and RNase domains. Spacer has previously been considered dispensable, merely acting as a tether between other domains or providing plasticity to accommodate deletions and mutations. We explore evidence for the role of spacer sequence, structure, and function in HBV evolution and lineage, consider its associations with escape from drugs, vaccines, and immune responses, and review its potential impacts on disease outcomes.
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