- EMDB-29936: CRYO-EM STRUCTURE OF IMPORTIN ALPHA1/BETA HETERODIMER -
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基本情報
登録情報
データベース: EMDB / ID: EMD-29936
タイトル
CRYO-EM STRUCTURE OF IMPORTIN ALPHA1/BETA HETERODIMER
マップデータ
試料
複合体: Importin Alpha1/Beta Heterodimer
タンパク質・ペプチド: Importin subunit beta-1
タンパク質・ペプチド: Importin subunit alpha-1
キーワード
Importins / TRANSPORT PROTEIN
機能・相同性
機能・相同性情報
RNA import into nucleus / Inhibition of nitric oxide production / mitotic chromosome movement towards spindle pole / endoplasmic reticulum tubular network / Sensing of DNA Double Strand Breaks / regulation of DNA recombination / astral microtubule organization / establishment of mitotic spindle localization / entry of viral genome into host nucleus through nuclear pore complex via importin / positive regulation of viral life cycle ...RNA import into nucleus / Inhibition of nitric oxide production / mitotic chromosome movement towards spindle pole / endoplasmic reticulum tubular network / Sensing of DNA Double Strand Breaks / regulation of DNA recombination / astral microtubule organization / establishment of mitotic spindle localization / entry of viral genome into host nucleus through nuclear pore complex via importin / positive regulation of viral life cycle / Transport of Ribonucleoproteins into the Host Nucleus / Regulation of cholesterol biosynthesis by SREBP (SREBF) / importin-alpha family protein binding / ribosomal protein import into nucleus / Initiation of Nuclear Envelope (NE) Reformation / NS1 Mediated Effects on Host Pathways / NLS-dependent protein nuclear import complex / Apoptosis induced DNA fragmentation / Nuclear import of Rev protein / Postmitotic nuclear pore complex (NPC) reformation / nuclear import signal receptor activity / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / DNA metabolic process / nuclear localization sequence binding / CaMK IV-mediated phosphorylation of CREB / mitotic metaphase chromosome alignment / NLS-bearing protein import into nucleus / positive regulation of type I interferon production / mitotic spindle assembly / nuclear pore / Assembly of the ORC complex at the origin of replication / Hsp90 protein binding / ISG15 antiviral mechanism / histone deacetylase binding / small GTPase binding / specific granule lumen / cytoplasmic stress granule / protein import into nucleus / SARS-CoV-1 activates/modulates innate immune responses / Interferon alpha/beta signaling / host cell / nuclear envelope / nuclear membrane / Estrogen-dependent gene expression / ficolin-1-rich granule lumen / protein domain specific binding / Golgi membrane / Neutrophil degranulation / endoplasmic reticulum membrane / SARS-CoV-2 activates/modulates innate and adaptive immune responses / enzyme binding / RNA binding / extracellular exosome / zinc ion binding / extracellular region / nucleoplasm / membrane / nucleus / cytosol / cytoplasm 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
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.