PROTEIN TRANSPORT / nuclear import / viral replication / peptide binding / nuclear localization signal binding / NUCLEAR PROTEIN
機能・相同性
機能・相同性情報
Sensing of DNA Double Strand Breaks / entry of viral genome into host nucleus through nuclear pore complex via importin / positive regulation of viral life cycle / NLS-dependent protein nuclear import complex / postsynapse to nucleus signaling pathway / nuclear import signal receptor activity / nuclear localization sequence binding / NLS-bearing protein import into nucleus / cytoplasmic stress granule / protein import into nucleus ...Sensing of DNA Double Strand Breaks / entry of viral genome into host nucleus through nuclear pore complex via importin / positive regulation of viral life cycle / NLS-dependent protein nuclear import complex / postsynapse to nucleus signaling pathway / nuclear import signal receptor activity / nuclear localization sequence binding / NLS-bearing protein import into nucleus / cytoplasmic stress granule / protein import into nucleus / host cell / DNA-binding transcription factor binding / postsynaptic density / glutamatergic synapse / nucleoplasm / nucleus / cytosol 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
5R01GM122844-04
米国
引用
ジャーナル: Sci Adv / 年: 2024 タイトル: Structural basis for nuclear import of hepatitis B virus (HBV) nucleocapsid core. 著者: Ruoyu Yang / Ying-Hui Ko / Fenglin Li / Ravi K Lokareddy / Chun-Feng David Hou / Christine Kim / Shelby Klein / Santiago Antolínez / Juan F Marín / Carolina Pérez-Segura / Martin F Jarrold ...著者: Ruoyu Yang / Ying-Hui Ko / Fenglin Li / Ravi K Lokareddy / Chun-Feng David Hou / Christine Kim / Shelby Klein / Santiago Antolínez / Juan F Marín / Carolina Pérez-Segura / Martin F Jarrold / Adam Zlotnick / Jodi A Hadden-Perilla / Gino Cingolani / 要旨: Nuclear import of the hepatitis B virus (HBV) nucleocapsid is essential for replication that occurs in the nucleus. The ~360-angstrom HBV capsid translocates to the nuclear pore complex (NPC) as an ...Nuclear import of the hepatitis B virus (HBV) nucleocapsid is essential for replication that occurs in the nucleus. The ~360-angstrom HBV capsid translocates to the nuclear pore complex (NPC) as an intact particle, hijacking human importins in a reaction stimulated by host kinases. This paper describes the mechanisms of HBV capsid recognition by importins. We found that importin α1 binds a nuclear localization signal (NLS) at the far end of the HBV coat protein Cp183 carboxyl-terminal domain (CTD). This NLS is exposed to the capsid surface through a pore at the icosahedral quasi-sixfold vertex. Phosphorylation at serine-155, serine-162, and serine-170 promotes CTD compaction but does not affect the affinity for importin α1. The binding of 30 importin α1/β1 augments HBV capsid diameter to ~620 angstroms, close to the maximum size trafficable through the NPC. We propose that phosphorylation favors CTD externalization and prompts its compaction at the capsid surface, exposing the NLS to importins.