ISG15 activating enzyme activity / ISG15 transferase activity / 合成酵素; C-S結合を形成; 酸とチオールを結合するもの / positive regulation of protein oligomerization / ISG15-protein conjugation / regulation of type II interferon production / NS1 Mediated Effects on Host Pathways / protein localization to mitochondrion / response to type I interferon / negative regulation of type I interferon-mediated signaling pathway ...ISG15 activating enzyme activity / ISG15 transferase activity / 合成酵素; C-S結合を形成; 酸とチオールを結合するもの / positive regulation of protein oligomerization / ISG15-protein conjugation / regulation of type II interferon production / NS1 Mediated Effects on Host Pathways / protein localization to mitochondrion / response to type I interferon / negative regulation of type I interferon-mediated signaling pathway / E2 ubiquitin-conjugating enzyme / negative regulation of viral genome replication / RSV-host interactions / ubiquitin conjugating enzyme activity / positive regulation of interleukin-10 production / positive regulation of bone mineralization / negative regulation of protein ubiquitination / positive regulation of interferon-beta production / positive regulation of erythrocyte differentiation / ubiquitin binding / integrin-mediated signaling pathway / Negative regulators of DDX58/IFIH1 signaling / Termination of translesion DNA synthesis / protein modification process / PKR-mediated signaling / DDX58/IFIH1-mediated induction of interferon-alpha/beta / response to virus / modification-dependent protein catabolic process / ISG15 antiviral mechanism / protein tag activity / positive regulation of type II interferon production / protein polyubiquitination / ubiquitin-protein transferase activity / Interferon alpha/beta signaling / integrin binding / Antigen processing: Ubiquitination & Proteasome degradation / ubiquitin-dependent protein catabolic process / defense response to virus / protein ubiquitination / defense response to bacterium / Amyloid fiber formation / innate immune response / ubiquitin protein ligase binding / DNA damage response / SARS-CoV-2 activates/modulates innate and adaptive immune responses / extracellular region / nucleoplasm / ATP binding / nucleus / cytosol / cytoplasm 類似検索 - 分子機能
ジャーナル: Nat Commun / 年: 2023 タイトル: Insights into the ISG15 transfer cascade by the UBE1L activating enzyme. 著者: Iona Wallace / Kheewoong Baek / J Rajan Prabu / Ronnald Vollrath / Susanne von Gronau / Brenda A Schulman / Kirby N Swatek / 要旨: The attachment of the ubiquitin-like protein ISG15 to substrates by specific E1-E2-E3 enzymes is a well-established signalling mechanism of the innate immune response. Here, we present a 3.45 Å ...The attachment of the ubiquitin-like protein ISG15 to substrates by specific E1-E2-E3 enzymes is a well-established signalling mechanism of the innate immune response. Here, we present a 3.45 Å cryo-EM structure of a chemically trapped UBE1L-UBE2L6 complex bound to activated ISG15. This structure reveals the details of the first steps of ISG15 recognition and UBE2L6 recruitment by UBE1L (also known as UBA7). Taking advantage of viral effector proteins from severe acute respiratory coronavirus 2 (SARS-CoV-2) and influenza B virus (IBV), we validate the structure and confirm the importance of the ISG15 C-terminal ubiquitin-like domain in the adenylation reaction. Moreover, biochemical characterization of the UBE1L-ISG15 and UBE1L-UBE2L6 interactions enables the design of ISG15 and UBE2L6 mutants with altered selectively for the ISG15 and ubiquitin conjugation pathways. Together, our study helps to define the molecular basis of these interactions and the specificity determinants that ensure the fidelity of ISG15 signalling during the antiviral response.
根拠: gel filtration, In addition to gel filtration, the stoichiometry of the complex was confirmed by reducing the E1-E2 disulfide linkage and analysing the sample by SDS-PAGE.