symbiont-mediated activation of host NF-kappaB cascade / symbiont-mediated arrest of host cell cycle during G2/M transition / positive regulation by virus of viral protein levels in host cell / spindle assembly involved in female meiosis / epigenetic programming in the zygotic pronuclei / Cul4-RING E3 ubiquitin ligase complex / UV-damage excision repair / biological process involved in interaction with symbiont / regulation of mitotic cell cycle phase transition / WD40-repeat domain binding ...symbiont-mediated activation of host NF-kappaB cascade / symbiont-mediated arrest of host cell cycle during G2/M transition / positive regulation by virus of viral protein levels in host cell / spindle assembly involved in female meiosis / epigenetic programming in the zygotic pronuclei / Cul4-RING E3 ubiquitin ligase complex / UV-damage excision repair / biological process involved in interaction with symbiont / regulation of mitotic cell cycle phase transition / WD40-repeat domain binding / Cul4A-RING E3 ubiquitin ligase complex / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / negative regulation of reproductive process / negative regulation of developmental process / cullin family protein binding / viral release from host cell / host cell mitochondrion / ectopic germ cell programmed cell death / positive regulation of viral genome replication / proteasomal protein catabolic process / positive regulation of gluconeogenesis / viral genome replication / Recognition of DNA damage by PCNA-containing replication complex / DNA Damage Recognition in GG-NER / nucleotide-excision repair / Dual Incision in GG-NER / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / Formation of Incision Complex in GG-NER / regulation of circadian rhythm / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / Wnt signaling pathway / positive regulation of protein catabolic process / cellular response to UV / rhythmic process / site of double-strand break / Neddylation / ubiquitin-dependent protein catabolic process / protein-macromolecule adaptor activity / damaged DNA binding / proteasome-mediated ubiquitin-dependent protein catabolic process / chromosome, telomeric region / protein ubiquitination / DNA repair / apoptotic process / DNA-templated transcription / DNA damage response / negative regulation of apoptotic process / protein-containing complex binding / nucleolus / host cell nucleus / protein-containing complex / extracellular space / DNA binding / extracellular exosome / nucleoplasm / nucleus / cytoplasm 類似検索 - 分子機能
Transactivation protein X / Trans-activation protein X / RSE1/DDB1/CPSF1 second beta-propeller / Cleavage/polyadenylation specificity factor, A subunit, C-terminal / Cleavage/polyadenylation specificity factor, A subunit, N-terminal / : / CPSF A subunit region / RSE1/DDB1/CPSF1 first beta-propeller / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily 類似検索 - ドメイン・相同性
DNA damage-binding protein 1 / Protein X 類似検索 - 構成要素
Japan Agency for Medical Research and Development (AMED)
JP20ae0101047
日本
Japan Agency for Medical Research and Development (AMED)
JP22ama121037
日本
Japan Agency for Medical Research and Development (AMED)
JP223fa627005
日本
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2025 タイトル: Structural basis of the hepatitis B virus X protein in complex with DDB1. 著者: Hiroki Tanaka / Joao Diogo Dias / Basile Jay / Shunsuke Kita / Mina Sasaki / Hiroyuki Takeda / Naoki Kishimoto / Shunsuke Sasaki / Shogo Misumi / Masashi Mizokami / Christine Neuveut / ...著者: Hiroki Tanaka / Joao Diogo Dias / Basile Jay / Shunsuke Kita / Mina Sasaki / Hiroyuki Takeda / Naoki Kishimoto / Shunsuke Sasaki / Shogo Misumi / Masashi Mizokami / Christine Neuveut / Takashi Sumikama / Mikihiro Shibata / Katsumi Maenaka / Shinichi Machida / 要旨: A cure for chronic hepatitis B requires eliminating or permanently silencing covalently closed circular DNA (cccDNA). A pivotal target of this approach is the hepatitis B virus (HBV) X protein (HBx), ...A cure for chronic hepatitis B requires eliminating or permanently silencing covalently closed circular DNA (cccDNA). A pivotal target of this approach is the hepatitis B virus (HBV) X protein (HBx), which is a key factor that promotes transcription from cccDNA. However, the HBx structure remains unsolved. Here, we present the cryoelectron microscopy structure of HBx in complex with DDB1, which is an essential complex for cccDNA transcription. In this structure, hydrophobic interactions within HBx were identified, and mutational analysis highlighted their importance in the HBV life cycle. Our biochemical analysis revealed that the HBx-DDB1 complex directly interacts simultaneously with NSE3, which is a component of the SMC5/6 complex, and Spindlin1. Additionally, HBx-DDB1 complex dynamics were explored via high-speed atomic force microscopy. These findings provide comprehensive insights into the structure and function of HBx in HBV replication.