- EMDB-27822: EM map of the human UBR5 HECT-type E3 ubiquitin ligase in a C2 sy... -
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基本情報
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データベース: EMDB / ID: EMD-27822
タイトル
EM map of the human UBR5 HECT-type E3 ubiquitin ligase in a C2 symmetric dimeric form
マップデータ
Final composite map
試料
複合体: Homodimer of human E3 ligase UBR5
タンパク質・ペプチド: E3 ubiquitin-protein ligase UBR5
リガンド: ZINC ION
キーワード
HECT / E3 ligase / Dimer / LIGASE
機能・相同性
機能・相同性情報
cytoplasm protein quality control / heterochromatin boundary formation / cytoplasm protein quality control by the ubiquitin-proteasome system / protein K29-linked ubiquitination / nuclear protein quality control by the ubiquitin-proteasome system / HECT-type E3 ubiquitin transferase / protein K11-linked ubiquitination / DNA repair-dependent chromatin remodeling / ubiquitin-ubiquitin ligase activity / progesterone receptor signaling pathway ...cytoplasm protein quality control / heterochromatin boundary formation / cytoplasm protein quality control by the ubiquitin-proteasome system / protein K29-linked ubiquitination / nuclear protein quality control by the ubiquitin-proteasome system / HECT-type E3 ubiquitin transferase / protein K11-linked ubiquitination / DNA repair-dependent chromatin remodeling / ubiquitin-ubiquitin ligase activity / progesterone receptor signaling pathway / protein K48-linked ubiquitination / negative regulation of smoothened signaling pathway / ubiquitin binding / positive regulation of protein import into nucleus / protein polyubiquitination / positive regulation of canonical Wnt signaling pathway / ubiquitin protein ligase activity / proteasome-mediated ubiquitin-dependent protein catabolic process / DNA repair / DNA damage response / positive regulation of gene expression / chromatin / perinuclear region of cytoplasm / protein-containing complex / RNA binding / zinc ion binding / nucleoplasm / membrane / nucleus / cytoplasm / cytosol 類似検索 - 分子機能
: / E3 ubiquitin ligase EDD, ubiquitin-associated domain / E3 ubiquitin ligase EDD / Polyadenylate-binding protein/Hyperplastic disc protein / Poly-adenylate binding protein, unique domain / Poly(A)-binding protein C-terminal (PABC) domain profile. / C-terminal domain of Poly(A)-binding protein. Present also in Drosophila hyperplastics discs protein. / PABC (PABP) domain / Zinc finger, UBR-type / Zinc finger UBR-type profile. ...: / E3 ubiquitin ligase EDD, ubiquitin-associated domain / E3 ubiquitin ligase EDD / Polyadenylate-binding protein/Hyperplastic disc protein / Poly-adenylate binding protein, unique domain / Poly(A)-binding protein C-terminal (PABC) domain profile. / C-terminal domain of Poly(A)-binding protein. Present also in Drosophila hyperplastics discs protein. / PABC (PABP) domain / Zinc finger, UBR-type / Zinc finger UBR-type profile. / Putative zinc finger in N-recognin, a recognition component of the N-end rule pathway / Regulator of chromosome condensation 1/beta-lactamase-inhibitor protein II / HECT domain / HECT, E3 ligase catalytic domain / HECT-domain (ubiquitin-transferase) / HECT domain profile. / Domain Homologous to E6-AP Carboxyl Terminus with 類似検索 - ドメイン・相同性
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM131754
米国
引用
ジャーナル: Structure / 年: 2023 タイトル: Structure of the human UBR5 E3 ubiquitin ligase. 著者: Feng Wang / Qing He / Wenhu Zhan / Ziqi Yu / Efrat Finkin-Groner / Xiaojing Ma / Gang Lin / Huilin Li / 要旨: The human UBR5 is a single polypeptide chain homology to E6AP C terminus (HECT)-type E3 ubiquitin ligase essential for embryonic development in mammals. Dysregulated UBR5 functions like an ...The human UBR5 is a single polypeptide chain homology to E6AP C terminus (HECT)-type E3 ubiquitin ligase essential for embryonic development in mammals. Dysregulated UBR5 functions like an oncoprotein to promote cancer growth and metastasis. Here, we report that UBR5 assembles into a dimer and a tetramer. Our cryoelectron microscopy (cryo-EM) structures reveal that two crescent-shaped UBR5 monomers assemble head to tail to form the dimer, and two dimers bind face to face to form the cage-like tetramer with all four catalytic HECT domains facing the central cavity. Importantly, the N-terminal region of one subunit and the HECT of the other form an "intermolecular jaw" in the dimer. We show the jaw-lining residues are important for function, suggesting that the intermolecular jaw functions to recruit ubiquitin-loaded E2 to UBR5. Further work is needed to understand how oligomerization regulates UBR5 ligase activity. This work provides a framework for structure-based anticancer drug development and contributes to a growing appreciation of E3 ligase diversity.